diff --git a/docs/v1/accounting/index.html b/docs/v1/accounting/index.html
index 1fd9a6ee..d72cc1a7 100644
--- a/docs/v1/accounting/index.html
+++ b/docs/v1/accounting/index.html
@@ -6008,7 +6008,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Accounting"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="Accounting"><a href="#api-Accounting">Methods</a></li>
               <li data-group="Accounting" data-name="createAccount" class="">
                 <a href="#api-Accounting-createAccount">createAccount</a>
diff --git a/docs/v1/appstore/index.html b/docs/v1/appstore/index.html
index ef753808..b081cf9e 100644
--- a/docs/v1/appstore/index.html
+++ b/docs/v1/appstore/index.html
@@ -1133,7 +1133,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="AppStore"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="AppStore"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="AppStore"><a href="#api-AppStore">Methods</a></li>
               <li data-group="AppStore" data-name="getSubscription" class="">
                 <a href="#api-AppStore-getSubscription">getSubscription</a>
diff --git a/docs/v1/assets/index.html b/docs/v1/assets/index.html
index 9400eee0..4ee182b7 100644
--- a/docs/v1/assets/index.html
+++ b/docs/v1/assets/index.html
@@ -1392,7 +1392,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Asset"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="Asset"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="Asset"><a href="#api-Asset">Methods</a></li>
               <li data-group="Asset" data-name="createAsset" class="">
                 <a href="#api-Asset-createAsset">createAsset</a>
diff --git a/docs/v1/files/index.html b/docs/v1/files/index.html
index 64f11bfb..efc7e727 100644
--- a/docs/v1/files/index.html
+++ b/docs/v1/files/index.html
@@ -1155,7 +1155,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Files"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Files"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="Files"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="Files"><a href="#api-Files">Methods</a></li>
               <li data-group="Files" data-name="createFileAssociation" class="">
                 <a href="#api-Files-createFileAssociation">createFileAssociation</a>
diff --git a/docs/v1/finance/index.html b/docs/v1/finance/index.html
index 68800d60..f076aa0a 100644
--- a/docs/v1/finance/index.html
+++ b/docs/v1/finance/index.html
@@ -2706,7 +2706,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Finance"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="Finance"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="Finance"><a href="#api-Finance">Methods</a></li>
               <li data-group="Finance" data-name="getAccountingActivityAccountUsage" class="">
                 <a href="#api-Finance-getAccountingActivityAccountUsage">getAccountingActivityAccountUsage</a>
diff --git a/docs/v1/payroll-au/index.html b/docs/v1/payroll-au/index.html
index d7ba6bb1..15c7de46 100644
--- a/docs/v1/payroll-au/index.html
+++ b/docs/v1/payroll-au/index.html
@@ -3254,7 +3254,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollAu"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="PayrollAu"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="PayrollAu"><a href="#api-PayrollAu">Methods</a></li>
               <li data-group="PayrollAu" data-name="createEmployee" class="">
                 <a href="#api-PayrollAu-createEmployee">createEmployee</a>
diff --git a/docs/v1/payroll-nz/index.html b/docs/v1/payroll-nz/index.html
index 91c38b60..cc0655c0 100644
--- a/docs/v1/payroll-nz/index.html
+++ b/docs/v1/payroll-nz/index.html
@@ -3838,7 +3838,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollNz"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="PayrollNz"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="PayrollNz"><a href="#api-PayrollNz">Methods</a></li>
               <li data-group="PayrollNz" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollNz-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/payroll-uk/index.html b/docs/v1/payroll-uk/index.html
index 17c5bc2e..1141c4d5 100644
--- a/docs/v1/payroll-uk/index.html
+++ b/docs/v1/payroll-uk/index.html
@@ -3510,7 +3510,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="PayrollUk"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="PayrollUk"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="PayrollUk"><a href="#api-PayrollUk">Methods</a></li>
               <li data-group="PayrollUk" data-name="approveTimesheet" class="">
                 <a href="#api-PayrollUk-approveTimesheet">approveTimesheet</a>
diff --git a/docs/v1/projects/index.html b/docs/v1/projects/index.html
index 7ee75058..734fc68b 100644
--- a/docs/v1/projects/index.html
+++ b/docs/v1/projects/index.html
@@ -1468,7 +1468,7 @@
           <nav id="scrollingNav">
             <ul class="sidenav nav nav-list">
               <li class="nav-header" data-group="Project"><strong>SDK: </strong><span id='sdk-name'></span></li>
-              <li class="nav-header" data-group="Project"><strong>VSN: </strong>1.19.0</li>
+              <li class="nav-header" data-group="Project"><strong>VSN: </strong>1.20.0</li>
               <li class="nav-header" data-group="Project"><a href="#api-Project">Methods</a></li>
               <li data-group="Project" data-name="createProject" class="">
                 <a href="#api-Project-createProject">createProject</a>
diff --git a/setup.py b/setup.py
index 560f7cb5..227efbdd 100644
--- a/setup.py
+++ b/setup.py
@@ -48,5 +48,5 @@ def read_file(filename):
     keywords="xero python sdk API oAuth",
     name="xero_python",
     packages=find_packages(include=["xero_python", "xero_python.*"]),
-    version="1.19.0",
+    version="1.20.0",
 )
diff --git a/xero_python/__init__.py b/xero_python/__init__.py
index 11afdfc9..9018c9a3 100644
--- a/xero_python/__init__.py
+++ b/xero_python/__init__.py
@@ -2,4 +2,4 @@
 
 __author__ = """Xero Developer API"""
 __email__ = "api@xero.com"
-__version__ = "1.19.0"
+__version__ = "1.20.0"
diff --git a/xero_python/accounting/api/accounting_api.py b/xero_python/accounting/api/accounting_api.py
index 5d221f0d..b5dcabfc 100644
--- a/xero_python/accounting/api/accounting_api.py
+++ b/xero_python/accounting/api/accounting_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/accounting/docs/LineItem.md b/xero_python/accounting/docs/LineItem.md
index 5613e8f6..d62092ec 100644
--- a/xero_python/accounting/docs/LineItem.md
+++ b/xero_python/accounting/docs/LineItem.md
@@ -13,10 +13,10 @@ Name | Type | Description | Notes
 **tax_type** | **str** | The tax type from TaxRates | [optional] 
 **tax_amount** | **float** | The tax amount is auto calculated as a percentage of the line amount (see below) based on the tax rate. This value can be overriden if the calculated &lt;TaxAmount&gt; is not correct. | [optional] 
 **item** | [**LineItemItem**](LineItemItem.md) |  | [optional] 
-**line_amount** | **float** | If you wish to omit either of the &lt;Quantity&gt; or &lt;UnitAmount&gt; you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if a DiscountRate has been used . i.e LineAmount &#x3D; Quantity * Unit Amount * ((100 – DiscountRate)/100) | [optional] 
+**line_amount** | **float** | If you wish to omit either the Quantity or UnitAmount you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if either a DiscountRate or DiscountAmount has been used i.e. LineAmount &#x3D; Quantity * Unit Amount * ((100 - DiscountRate)/100) or LineAmount &#x3D; (Quantity * UnitAmount) - DiscountAmount | [optional] 
 **tracking** | [**list[LineItemTracking]**](LineItemTracking.md) | Optional Tracking Category – see Tracking.  Any LineItem can have a  maximum of 2 &lt;TrackingCategory&gt; elements. | [optional] 
 **discount_rate** | **float** | Percentage discount being applied to a line item (only supported on  ACCREC invoices – ACC PAY invoices and credit notes in Xero do not support discounts | [optional] 
-**discount_amount** | **float** | Discount amount being applied to a line item. Only supported on ACCREC invoices - ACCPAY invoices and credit notes in Xero do not support discounts. | [optional] 
+**discount_amount** | **float** | Discount amount being applied to a line item. Only supported on ACCREC invoices and quotes. ACCPAY invoices and credit notes in Xero do not support discounts. | [optional] 
 **repeating_invoice_id** | **str** | The Xero identifier for a Repeating Invoice | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/xero_python/accounting/models/line_item.py b/xero_python/accounting/models/line_item.py
index 335c7bac..205bf854 100644
--- a/xero_python/accounting/models/line_item.py
+++ b/xero_python/accounting/models/line_item.py
@@ -365,7 +365,7 @@ def item(self, item):
     def line_amount(self):
         """Gets the line_amount of this LineItem.  # noqa: E501
 
-        If you wish to omit either of the <Quantity> or <UnitAmount> you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if a DiscountRate has been used . i.e LineAmount = Quantity * Unit Amount * ((100 – DiscountRate)/100)  # noqa: E501
+        If you wish to omit either the Quantity or UnitAmount you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if either a DiscountRate or DiscountAmount has been used i.e. LineAmount = Quantity * Unit Amount * ((100 - DiscountRate)/100) or LineAmount = (Quantity * UnitAmount) - DiscountAmount  # noqa: E501
 
         :return: The line_amount of this LineItem.  # noqa: E501
         :rtype: float
@@ -376,7 +376,7 @@ def line_amount(self):
     def line_amount(self, line_amount):
         """Sets the line_amount of this LineItem.
 
-        If you wish to omit either of the <Quantity> or <UnitAmount> you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if a DiscountRate has been used . i.e LineAmount = Quantity * Unit Amount * ((100 – DiscountRate)/100)  # noqa: E501
+        If you wish to omit either the Quantity or UnitAmount you can provide a LineAmount and Xero will calculate the missing amount for you. The line amount reflects the discounted price if either a DiscountRate or DiscountAmount has been used i.e. LineAmount = Quantity * Unit Amount * ((100 - DiscountRate)/100) or LineAmount = (Quantity * UnitAmount) - DiscountAmount  # noqa: E501
 
         :param line_amount: The line_amount of this LineItem.  # noqa: E501
         :type: float
@@ -434,7 +434,7 @@ def discount_rate(self, discount_rate):
     def discount_amount(self):
         """Gets the discount_amount of this LineItem.  # noqa: E501
 
-        Discount amount being applied to a line item. Only supported on ACCREC invoices - ACCPAY invoices and credit notes in Xero do not support discounts.  # noqa: E501
+        Discount amount being applied to a line item. Only supported on ACCREC invoices and quotes. ACCPAY invoices and credit notes in Xero do not support discounts.  # noqa: E501
 
         :return: The discount_amount of this LineItem.  # noqa: E501
         :rtype: float
@@ -445,7 +445,7 @@ def discount_amount(self):
     def discount_amount(self, discount_amount):
         """Sets the discount_amount of this LineItem.
 
-        Discount amount being applied to a line item. Only supported on ACCREC invoices - ACCPAY invoices and credit notes in Xero do not support discounts.  # noqa: E501
+        Discount amount being applied to a line item. Only supported on ACCREC invoices and quotes. ACCPAY invoices and credit notes in Xero do not support discounts.  # noqa: E501
 
         :param discount_amount: The discount_amount of this LineItem.  # noqa: E501
         :type: float
diff --git a/xero_python/accounting/models/time_zone.py b/xero_python/accounting/models/time_zone.py
index 32191523..ccd9f969 100644
--- a/xero_python/accounting/models/time_zone.py
+++ b/xero_python/accounting/models/time_zone.py
@@ -24,112 +24,144 @@ class TimeZone(Enum):
     allowed enum values
     """
 
-    MOROCCOSTANDARDTIME = "MOROCCOSTANDARDTIME"
-    UTC = "UTC"
-    GMTSTANDARDTIME = "GMTSTANDARDTIME"
-    GREENWICHSTANDARDTIME = "GREENWICHSTANDARDTIME"
-    WEUROPESTANDARDTIME = "WEUROPESTANDARDTIME"
-    CENTRALEUROPESTANDARDTIME = "CENTRALEUROPESTANDARDTIME"
-    ROMANCESTANDARDTIME = "ROMANCESTANDARDTIME"
-    CENTRALEUROPEANSTANDARDTIME = "CENTRALEUROPEANSTANDARDTIME"
-    WCENTRALAFRICASTANDARDTIME = "WCENTRALAFRICASTANDARDTIME"
-    NAMIBIASTANDARDTIME = "NAMIBIASTANDARDTIME"
-    JORDANSTANDARDTIME = "JORDANSTANDARDTIME"
-    GTBSTANDARDTIME = "GTBSTANDARDTIME"
-    MIDDLEEASTSTANDARDTIME = "MIDDLEEASTSTANDARDTIME"
-    EGYPTSTANDARDTIME = "EGYPTSTANDARDTIME"
-    SYRIASTANDARDTIME = "SYRIASTANDARDTIME"
-    EEUROPESTANDARDTIME = "EEUROPESTANDARDTIME"
-    SOUTHAFRICASTANDARDTIME = "SOUTHAFRICASTANDARDTIME"
-    FLESTANDARDTIME = "FLESTANDARDTIME"
-    TURKEYSTANDARDTIME = "TURKEYSTANDARDTIME"
-    ISRAELSTANDARDTIME = "ISRAELSTANDARDTIME"
-    KALININGRADSTANDARDTIME = "KALININGRADSTANDARDTIME"
-    LIBYASTANDARDTIME = "LIBYASTANDARDTIME"
+    AFGHANISTANSTANDARDTIME = "AFGHANISTANSTANDARDTIME"
+    ALASKANSTANDARDTIME = "ALASKANSTANDARDTIME"
+    ALEUTIANSTANDARDTIME = "ALEUTIANSTANDARDTIME"
+    ALTAISTANDARDTIME = "ALTAISTANDARDTIME"
+    ARABIANSTANDARDTIME = "ARABIANSTANDARDTIME"
     ARABICSTANDARDTIME = "ARABICSTANDARDTIME"
     ARABSTANDARDTIME = "ARABSTANDARDTIME"
-    BELARUSSTANDARDTIME = "BELARUSSTANDARDTIME"
-    RUSSIANSTANDARDTIME = "RUSSIANSTANDARDTIME"
-    EAFRICASTANDARDTIME = "EAFRICASTANDARDTIME"
-    IRANSTANDARDTIME = "IRANSTANDARDTIME"
-    ARABIANSTANDARDTIME = "ARABIANSTANDARDTIME"
+    ARGENTINASTANDARDTIME = "ARGENTINASTANDARDTIME"
+    ASTRAKHANSTANDARDTIME = "ASTRAKHANSTANDARDTIME"
+    ATLANTICSTANDARDTIME = "ATLANTICSTANDARDTIME"
+    AUSCENTRALSTANDARDTIME = "AUSCENTRALSTANDARDTIME"
+    AUSCENTRALWSTANDARDTIME = "AUSCENTRALWSTANDARDTIME"
+    AUSEASTERNSTANDARDTIME = "AUSEASTERNSTANDARDTIME"
     AZERBAIJANSTANDARDTIME = "AZERBAIJANSTANDARDTIME"
-    RUSSIATIMEZONE3 = "RUSSIATIMEZONE3"
-    MAURITIUSSTANDARDTIME = "MAURITIUSSTANDARDTIME"
-    GEORGIANSTANDARDTIME = "GEORGIANSTANDARDTIME"
+    AZORESSTANDARDTIME = "AZORESSTANDARDTIME"
+    BAHIASTANDARDTIME = "BAHIASTANDARDTIME"
+    BANGLADESHSTANDARDTIME = "BANGLADESHSTANDARDTIME"
+    BELARUSSTANDARDTIME = "BELARUSSTANDARDTIME"
+    BOUGAINVILLESTANDARDTIME = "BOUGAINVILLESTANDARDTIME"
+    CANADACENTRALSTANDARDTIME = "CANADACENTRALSTANDARDTIME"
+    CAPEVERDESTANDARDTIME = "CAPEVERDESTANDARDTIME"
     CAUCASUSSTANDARDTIME = "CAUCASUSSTANDARDTIME"
-    AFGHANISTANSTANDARDTIME = "AFGHANISTANSTANDARDTIME"
-    WESTASIASTANDARDTIME = "WESTASIASTANDARDTIME"
-    EKATERINBURGSTANDARDTIME = "EKATERINBURGSTANDARDTIME"
-    PAKISTANSTANDARDTIME = "PAKISTANSTANDARDTIME"
-    INDIASTANDARDTIME = "INDIASTANDARDTIME"
-    SRILANKASTANDARDTIME = "SRILANKASTANDARDTIME"
-    NEPALSTANDARDTIME = "NEPALSTANDARDTIME"
+    CENAUSTRALIASTANDARDTIME = "CENAUSTRALIASTANDARDTIME"
+    CENTRALAMERICASTANDARDTIME = "CENTRALAMERICASTANDARDTIME"
     CENTRALASIASTANDARDTIME = "CENTRALASIASTANDARDTIME"
-    BANGLADESHSTANDARDTIME = "BANGLADESHSTANDARDTIME"
-    NCENTRALASIASTANDARDTIME = "NCENTRALASIASTANDARDTIME"
-    MYANMARSTANDARDTIME = "MYANMARSTANDARDTIME"
-    SEASIASTANDARDTIME = "SEASIASTANDARDTIME"
-    NORTHASIASTANDARDTIME = "NORTHASIASTANDARDTIME"
+    CENTRALBRAZILIANSTANDARDTIME = "CENTRALBRAZILIANSTANDARDTIME"
+    CENTRALEUROPEANSTANDARDTIME = "CENTRALEUROPEANSTANDARDTIME"
+    CENTRALEUROPESTANDARDTIME = "CENTRALEUROPESTANDARDTIME"
+    CENTRALPACIFICSTANDARDTIME = "CENTRALPACIFICSTANDARDTIME"
+    CENTRALSTANDARDTIME = "CENTRALSTANDARDTIME"
+    CENTRALSTANDARDTIME_MEXICO_ = "CENTRALSTANDARDTIME(MEXICO)"
+    CHATHAMISLANDSSTANDARDTIME = "CHATHAMISLANDSSTANDARDTIME"
     CHINASTANDARDTIME = "CHINASTANDARDTIME"
-    NORTHASIAEASTSTANDARDTIME = "NORTHASIAEASTSTANDARDTIME"
-    SINGAPORESTANDARDTIME = "SINGAPORESTANDARDTIME"
-    WAUSTRALIASTANDARDTIME = "WAUSTRALIASTANDARDTIME"
-    TAIPEISTANDARDTIME = "TAIPEISTANDARDTIME"
-    ULAANBAATARSTANDARDTIME = "ULAANBAATARSTANDARDTIME"
-    TOKYOSTANDARDTIME = "TOKYOSTANDARDTIME"
-    KOREASTANDARDTIME = "KOREASTANDARDTIME"
-    YAKUTSKSTANDARDTIME = "YAKUTSKSTANDARDTIME"
-    CENAUSTRALIASTANDARDTIME = "CENAUSTRALIASTANDARDTIME"
-    AUSCENTRALSTANDARDTIME = "AUSCENTRALSTANDARDTIME"
+    CUBASTANDARDTIME = "CUBASTANDARDTIME"
+    DATELINESTANDARDTIME = "DATELINESTANDARDTIME"
+    EAFRICASTANDARDTIME = "EAFRICASTANDARDTIME"
+    EASTERISLANDSTANDARDTIME = "EASTERISLANDSTANDARDTIME"
+    EASTERNSTANDARDTIME = "EASTERNSTANDARDTIME"
+    EASTERNSTANDARDTIME_MEXICO_ = "EASTERNSTANDARDTIME(MEXICO)"
     EAUSTRALIASTANDARDTIME = "EAUSTRALIASTANDARDTIME"
-    AUSEASTERNSTANDARDTIME = "AUSEASTERNSTANDARDTIME"
-    WESTPACIFICSTANDARDTIME = "WESTPACIFICSTANDARDTIME"
-    TASMANIASTANDARDTIME = "TASMANIASTANDARDTIME"
-    MAGADANSTANDARDTIME = "MAGADANSTANDARDTIME"
-    VLADIVOSTOKSTANDARDTIME = "VLADIVOSTOKSTANDARDTIME"
-    RUSSIATIMEZONE10 = "RUSSIATIMEZONE10"
-    CENTRALPACIFICSTANDARDTIME = "CENTRALPACIFICSTANDARDTIME"
-    RUSSIATIMEZONE11 = "RUSSIATIMEZONE11"
-    NEWZEALANDSTANDARDTIME = "NEWZEALANDSTANDARDTIME"
-    UTC_12 = "UTC+12"
-    UTC_13 = "UTC+13"
+    EEUROPESTANDARDTIME = "EEUROPESTANDARDTIME"
+    EGYPTSTANDARDTIME = "EGYPTSTANDARDTIME"
+    EKATERINBURGSTANDARDTIME = "EKATERINBURGSTANDARDTIME"
+    ESOUTHAMERICASTANDARDTIME = "ESOUTHAMERICASTANDARDTIME"
     FIJISTANDARDTIME = "FIJISTANDARDTIME"
+    FLESTANDARDTIME = "FLESTANDARDTIME"
+    GEORGIANSTANDARDTIME = "GEORGIANSTANDARDTIME"
+    GMTSTANDARDTIME = "GMTSTANDARDTIME"
+    GREENLANDSTANDARDTIME = "GREENLANDSTANDARDTIME"
+    GREENWICHSTANDARDTIME = "GREENWICHSTANDARDTIME"
+    GTBSTANDARDTIME = "GTBSTANDARDTIME"
+    HAITISTANDARDTIME = "HAITISTANDARDTIME"
+    HAWAIIANSTANDARDTIME = "HAWAIIANSTANDARDTIME"
+    INDIASTANDARDTIME = "INDIASTANDARDTIME"
+    IRANSTANDARDTIME = "IRANSTANDARDTIME"
+    ISRAELSTANDARDTIME = "ISRAELSTANDARDTIME"
+    JORDANSTANDARDTIME = "JORDANSTANDARDTIME"
+    KALININGRADSTANDARDTIME = "KALININGRADSTANDARDTIME"
     KAMCHATKASTANDARDTIME = "KAMCHATKASTANDARDTIME"
-    TONGASTANDARDTIME = "TONGASTANDARDTIME"
-    SAMOASTANDARDTIME = "SAMOASTANDARDTIME"
+    KOREASTANDARDTIME = "KOREASTANDARDTIME"
+    LIBYASTANDARDTIME = "LIBYASTANDARDTIME"
     LINEISLANDSSTANDARDTIME = "LINEISLANDSSTANDARDTIME"
-    AZORESSTANDARDTIME = "AZORESSTANDARDTIME"
-    CAPEVERDESTANDARDTIME = "CAPEVERDESTANDARDTIME"
-    UTC02 = "UTC02"
+    LORDHOWESTANDARDTIME = "LORDHOWESTANDARDTIME"
+    MAGADANSTANDARDTIME = "MAGADANSTANDARDTIME"
+    MAGALLANESSTANDARDTIME = "MAGALLANESSTANDARDTIME"
+    MARQUESASSTANDARDTIME = "MARQUESASSTANDARDTIME"
+    MAURITIUSSTANDARDTIME = "MAURITIUSSTANDARDTIME"
     MIDATLANTICSTANDARDTIME = "MIDATLANTICSTANDARDTIME"
-    ESOUTHAMERICASTANDARDTIME = "ESOUTHAMERICASTANDARDTIME"
-    ARGENTINASTANDARDTIME = "ARGENTINASTANDARDTIME"
-    SAEASTERNSTANDARDTIME = "SAEASTERNSTANDARDTIME"
-    GREENLANDSTANDARDTIME = "GREENLANDSTANDARDTIME"
+    MIDDLEEASTSTANDARDTIME = "MIDDLEEASTSTANDARDTIME"
     MONTEVIDEOSTANDARDTIME = "MONTEVIDEOSTANDARDTIME"
-    BAHIASTANDARDTIME = "BAHIASTANDARDTIME"
+    MOROCCOSTANDARDTIME = "MOROCCOSTANDARDTIME"
+    MOUNTAINSTANDARDTIME = "MOUNTAINSTANDARDTIME"
+    MOUNTAINSTANDARDTIME_MEXICO_ = "MOUNTAINSTANDARDTIME(MEXICO)"
+    MYANMARSTANDARDTIME = "MYANMARSTANDARDTIME"
+    NAMIBIASTANDARDTIME = "NAMIBIASTANDARDTIME"
+    NCENTRALASIASTANDARDTIME = "NCENTRALASIASTANDARDTIME"
+    NEPALSTANDARDTIME = "NEPALSTANDARDTIME"
     NEWFOUNDLANDSTANDARDTIME = "NEWFOUNDLANDSTANDARDTIME"
-    PARAGUAYSTANDARDTIME = "PARAGUAYSTANDARDTIME"
-    ATLANTICSTANDARDTIME = "ATLANTICSTANDARDTIME"
-    CENTRALBRAZILIANSTANDARDTIME = "CENTRALBRAZILIANSTANDARDTIME"
-    SAWESTERNSTANDARDTIME = "SAWESTERNSTANDARDTIME"
+    NEWZEALANDSTANDARDTIME = "NEWZEALANDSTANDARDTIME"
+    NORFOLKSTANDARDTIME = "NORFOLKSTANDARDTIME"
+    NORTHASIAEASTSTANDARDTIME = "NORTHASIAEASTSTANDARDTIME"
+    NORTHASIASTANDARDTIME = "NORTHASIASTANDARDTIME"
+    NORTHKOREASTANDARDTIME = "NORTHKOREASTANDARDTIME"
+    OMSKSTANDARDTIME = "OMSKSTANDARDTIME"
     PACIFICSASTANDARDTIME = "PACIFICSASTANDARDTIME"
-    VENEZUELASTANDARDTIME = "VENEZUELASTANDARDTIME"
+    PACIFICSTANDARDTIME = "PACIFICSTANDARDTIME"
+    PACIFICSTANDARDTIME_MEXICO_ = "PACIFICSTANDARDTIME(MEXICO)"
+    PAKISTANSTANDARDTIME = "PAKISTANSTANDARDTIME"
+    PARAGUAYSTANDARDTIME = "PARAGUAYSTANDARDTIME"
+    QYZYLORDASTANDARDTIME = "QYZYLORDASTANDARDTIME"
+    ROMANCESTANDARDTIME = "ROMANCESTANDARDTIME"
+    RUSSIANSTANDARDTIME = "RUSSIANSTANDARDTIME"
+    RUSSIATIMEZONE10 = "RUSSIATIMEZONE10"
+    RUSSIATIMEZONE11 = "RUSSIATIMEZONE11"
+    RUSSIATIMEZONE3 = "RUSSIATIMEZONE3"
+    SAEASTERNSTANDARDTIME = "SAEASTERNSTANDARDTIME"
+    SAINTPIERRESTANDARDTIME = "SAINTPIERRESTANDARDTIME"
+    SAKHALINSTANDARDTIME = "SAKHALINSTANDARDTIME"
+    SAMOASTANDARDTIME = "SAMOASTANDARDTIME"
+    SAOTOMESTANDARDTIME = "SAOTOMESTANDARDTIME"
     SAPACIFICSTANDARDTIME = "SAPACIFICSTANDARDTIME"
-    EASTERNSTANDARDTIME = "EASTERNSTANDARDTIME"
+    SARATOVSTANDARDTIME = "SARATOVSTANDARDTIME"
+    SAWESTERNSTANDARDTIME = "SAWESTERNSTANDARDTIME"
+    SEASIASTANDARDTIME = "SEASIASTANDARDTIME"
+    SINGAPORESTANDARDTIME = "SINGAPORESTANDARDTIME"
+    SOUTHAFRICASTANDARDTIME = "SOUTHAFRICASTANDARDTIME"
+    SOUTHSUDANSTANDARDTIME = "SOUTHSUDANSTANDARDTIME"
+    SRILANKASTANDARDTIME = "SRILANKASTANDARDTIME"
+    SUDANSTANDARDTIME = "SUDANSTANDARDTIME"
+    SYRIASTANDARDTIME = "SYRIASTANDARDTIME"
+    TAIPEISTANDARDTIME = "TAIPEISTANDARDTIME"
+    TASMANIASTANDARDTIME = "TASMANIASTANDARDTIME"
+    TOCANTINSSTANDARDTIME = "TOCANTINSSTANDARDTIME"
+    TOKYOSTANDARDTIME = "TOKYOSTANDARDTIME"
+    TOMSKSTANDARDTIME = "TOMSKSTANDARDTIME"
+    TONGASTANDARDTIME = "TONGASTANDARDTIME"
+    TRANSBAIKALSTANDARDTIME = "TRANSBAIKALSTANDARDTIME"
+    TURKEYSTANDARDTIME = "TURKEYSTANDARDTIME"
+    TURKSANDCAICOSSTANDARDTIME = "TURKSANDCAICOSSTANDARDTIME"
+    ULAANBAATARSTANDARDTIME = "ULAANBAATARSTANDARDTIME"
     USEASTERNSTANDARDTIME = "USEASTERNSTANDARDTIME"
-    CENTRALAMERICASTANDARDTIME = "CENTRALAMERICASTANDARDTIME"
-    CENTRALSTANDARDTIME = "CENTRALSTANDARDTIME"
-    CENTRALSTANDARDTIME_MEXICO_ = "CENTRALSTANDARDTIME(MEXICO)"
-    CANADACENTRALSTANDARDTIME = "CANADACENTRALSTANDARDTIME"
     USMOUNTAINSTANDARDTIME = "USMOUNTAINSTANDARDTIME"
-    MOUNTAINSTANDARDTIME_MEXICO_ = "MOUNTAINSTANDARDTIME(MEXICO)"
-    MOUNTAINSTANDARDTIME = "MOUNTAINSTANDARDTIME"
-    PACIFICSTANDARDTIME_MEXICO_ = "PACIFICSTANDARDTIME(MEXICO)"
-    PACIFICSTANDARDTIME = "PACIFICSTANDARDTIME"
-    ALASKANSTANDARDTIME = "ALASKANSTANDARDTIME"
-    HAWAIIANSTANDARDTIME = "HAWAIIANSTANDARDTIME"
+    UTC = "UTC"
+    UTC_12 = "UTC+12"
+    UTC_13 = "UTC+13"
+    UTC02 = "UTC02"
+    UTC08 = "UTC08"
+    UTC09 = "UTC09"
     UTC11 = "UTC11"
-    DATELINESTANDARDTIME = "DATELINESTANDARDTIME"
-    EASTERISLANDSTANDARDTIME = "EASTERISLANDSTANDARDTIME"
+    VENEZUELASTANDARDTIME = "VENEZUELASTANDARDTIME"
+    VLADIVOSTOKSTANDARDTIME = "VLADIVOSTOKSTANDARDTIME"
+    VOLGOGRADSTANDARDTIME = "VOLGOGRADSTANDARDTIME"
+    WAUSTRALIASTANDARDTIME = "WAUSTRALIASTANDARDTIME"
+    WCENTRALAFRICASTANDARDTIME = "WCENTRALAFRICASTANDARDTIME"
+    WESTASIASTANDARDTIME = "WESTASIASTANDARDTIME"
+    WESTBANKSTANDARDTIME = "WESTBANKSTANDARDTIME"
+    WESTPACIFICSTANDARDTIME = "WESTPACIFICSTANDARDTIME"
+    WEUROPESTANDARDTIME = "WEUROPESTANDARDTIME"
+    WMONGOLIASTANDARDTIME = "WMONGOLIASTANDARDTIME"
+    YAKUTSKSTANDARDTIME = "YAKUTSKSTANDARDTIME"
+    YUKONSTANDARDTIME = "YUKONSTANDARDTIME"
diff --git a/xero_python/appstore/__init__.py b/xero_python/appstore/__init__.py
index 3edeead4..b47e2dcb 100644
--- a/xero_python/appstore/__init__.py
+++ b/xero_python/appstore/__init__.py
@@ -17,9 +17,13 @@
 
 
 # import models into sdk package
+from xero_python.appstore.models.create_usage_record import CreateUsageRecord
 from xero_python.appstore.models.plan import Plan
 from xero_python.appstore.models.price import Price
 from xero_python.appstore.models.problem_details import ProblemDetails
 from xero_python.appstore.models.product import Product
 from xero_python.appstore.models.subscription import Subscription
 from xero_python.appstore.models.subscription_item import SubscriptionItem
+from xero_python.appstore.models.update_usage_record import UpdateUsageRecord
+from xero_python.appstore.models.usage_record import UsageRecord
+from xero_python.appstore.models.usage_records_list import UsageRecordsList
diff --git a/xero_python/appstore/api/app_store_api.py b/xero_python/appstore/api/app_store_api.py
index e4515a97..b5d5c829 100644
--- a/xero_python/appstore/api/app_store_api.py
+++ b/xero_python/appstore/api/app_store_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
@@ -121,3 +121,258 @@ def get_subscription(
             )
         except exceptions.HTTPStatusException as error:
             raise translate_status_exception(error, self, "get_subscription")
+
+    def get_usage_records(
+        self,
+        subscription_id,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Gets all usage records related to the subscription  # noqa: E501
+        OAuth2 scope: marketplace.billing
+        :param str subscription_id: Unique identifier for Subscription object (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: UsageRecordsList
+        """
+
+        # verify the required parameter 'subscription_id' is set
+        if subscription_id is None:
+            raise ValueError(
+                "Missing the required parameter `subscription_id` "
+                "when calling `get_usage_records`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "subscriptionId": subscription_id,
+        }
+
+        query_params = []
+
+        header_params = {}
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = None
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url("/subscriptions/{subscriptionId}/usage-records")
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "GET",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="UsageRecordsList",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(error, self, "get_usage_records")
+
+    def post_usage_records(
+        self,
+        subscription_id,
+        subscription_item_id,
+        create_usage_record,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Send metered usage belonging to this subscription and subscription item  # noqa: E501
+        OAuth2 scope: marketplace.billing
+        :param str subscription_id: Unique identifier for Subscription object (required)
+        :param str subscription_item_id: The unique identifier of the subscriptionItem (required)
+        :param CreateUsageRecord create_usage_record: Contains the quantity for the usage record to create (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: UsageRecord
+        """
+
+        # verify the required parameter 'subscription_id' is set
+        if subscription_id is None:
+            raise ValueError(
+                "Missing the required parameter `subscription_id` "
+                "when calling `post_usage_records`"
+            )
+        # verify the required parameter 'subscription_item_id' is set
+        if subscription_item_id is None:
+            raise ValueError(
+                "Missing the required parameter `subscription_item_id` "
+                "when calling `post_usage_records`"
+            )
+        # verify the required parameter 'create_usage_record' is set
+        if create_usage_record is None:
+            raise ValueError(
+                "Missing the required parameter `create_usage_record` "
+                "when calling `post_usage_records`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "subscriptionId": subscription_id,
+            "subscriptionItemId": subscription_item_id,
+        }
+
+        query_params = []
+
+        header_params = {}
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = create_usage_record
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # HTTP header `Content-Type`
+        header_params["Content-Type"] = self.api_client.select_header_content_type(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url(
+            "/subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records"
+        )
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "POST",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="UsageRecord",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(error, self, "post_usage_records")
+
+    def put_usage_records(
+        self,
+        subscription_id,
+        subscription_item_id,
+        usage_record_id,
+        update_usage_record,
+        _return_http_data_only=True,
+        _preload_content=True,
+        _request_timeout=None,
+    ):
+        """Update and existing metered usage belonging to this subscription and subscription item  # noqa: E501
+        OAuth2 scope: marketplace.billing
+        :param str subscription_id: Unique identifier for Subscription object (required)
+        :param str subscription_item_id: The unique identifier of the subscriptionItem (required)
+        :param str usage_record_id: The unique identifier of the usage record (required)
+        :param UpdateUsageRecord update_usage_record: Contains the quantity for the usage record to update (required)
+        :param bool _return_http_data_only: return received data only
+        :param bool _preload_content: load received data in models
+        :param bool _request_timeout: maximum wait time for response
+        :return: UsageRecord
+        """
+
+        # verify the required parameter 'subscription_id' is set
+        if subscription_id is None:
+            raise ValueError(
+                "Missing the required parameter `subscription_id` "
+                "when calling `put_usage_records`"
+            )
+        # verify the required parameter 'subscription_item_id' is set
+        if subscription_item_id is None:
+            raise ValueError(
+                "Missing the required parameter `subscription_item_id` "
+                "when calling `put_usage_records`"
+            )
+        # verify the required parameter 'usage_record_id' is set
+        if usage_record_id is None:
+            raise ValueError(
+                "Missing the required parameter `usage_record_id` "
+                "when calling `put_usage_records`"
+            )
+        # verify the required parameter 'update_usage_record' is set
+        if update_usage_record is None:
+            raise ValueError(
+                "Missing the required parameter `update_usage_record` "
+                "when calling `put_usage_records`"
+            )
+
+        collection_formats = {}
+        path_params = {
+            "subscriptionId": subscription_id,
+            "subscriptionItemId": subscription_item_id,
+            "usageRecordId": usage_record_id,
+        }
+
+        query_params = []
+
+        header_params = {}
+
+        local_var_files = {}
+        form_params = []
+
+        body_params = update_usage_record
+        # HTTP header `Accept`
+        header_params["Accept"] = self.api_client.select_header_accept(
+            ["application/json"]
+        )
+
+        # HTTP header `Content-Type`
+        header_params["Content-Type"] = self.api_client.select_header_content_type(
+            ["application/json"]
+        )
+
+        # Authentication setting
+        auth_settings = ["OAuth2"]
+        url = self.get_resource_url(
+            "/subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records/{usageRecordId}"
+        )
+
+        try:
+            return self.api_client.call_api(
+                url,
+                "PUT",
+                path_params,
+                query_params,
+                header_params,
+                body=body_params,
+                post_params=form_params,
+                files=local_var_files,
+                response_type="UsageRecord",
+                response_model_finder=self.get_model_finder(),
+                auth_settings=auth_settings,
+                _return_http_data_only=_return_http_data_only,
+                _preload_content=_preload_content,
+                _request_timeout=_request_timeout,
+                collection_formats=collection_formats,
+            )
+        except exceptions.HTTPStatusException as error:
+            raise translate_status_exception(error, self, "put_usage_records")
diff --git a/xero_python/appstore/docs/AppStoreApi.md b/xero_python/appstore/docs/AppStoreApi.md
index 475c655b..5c5f141f 100644
--- a/xero_python/appstore/docs/AppStoreApi.md
+++ b/xero_python/appstore/docs/AppStoreApi.md
@@ -5,6 +5,9 @@ All URIs are relative to *https://api.xero.com/appstore/2.0*
 Method | HTTP request | Description
 ------------- | ------------- | -------------
 [**get_subscription**](AppStoreApi.md#get_subscription) | **GET** /subscriptions/{subscriptionId} | Retrieves a subscription for a given subscriptionId
+[**get_usage_records**](AppStoreApi.md#get_usage_records) | **GET** /subscriptions/{subscriptionId}/usage-records | Gets all usage records related to the subscription
+[**post_usage_records**](AppStoreApi.md#post_usage_records) | **POST** /subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records | Send metered usage belonging to this subscription and subscription item
+[**put_usage_records**](AppStoreApi.md#put_usage_records) | **PUT** /subscriptions/{subscriptionId}/items/{subscriptionItemId}/usage-records/{usageRecordId} | Update and existing metered usage belonging to this subscription and subscription item
 
 
 # **get_subscription**
@@ -68,3 +71,196 @@ Name | Type | Description  | Notes
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **get_usage_records**
+> UsageRecordsList get_usage_records(subscription_id)
+
+Gets all usage records related to the subscription
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.appstore import AppStoreApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AppStoreApi(api_client)
+
+subscription_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Subscription object
+try:
+    # Gets all usage records related to the subscription
+    api_response = api_instance.get_usage_records(subscription_id)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AppStoreApi->get_usage_records: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **subscription_id** | [**str**](.md)| Unique identifier for Subscription object | 
+
+### Return type
+
+[**UsageRecordsList**](UsageRecordsList.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+# **post_usage_records**
+> UsageRecord post_usage_records(subscription_id, subscription_item_id, create_usage_record)
+
+Send metered usage belonging to this subscription and subscription item
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.appstore import AppStoreApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AppStoreApi(api_client)
+
+subscription_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Subscription object
+subscription_item_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the subscriptionItem
+create_usage_record = { "timestamp": "2022-01-21T13:01:00Z", "quantity": 10 } # CreateUsageRecord | Contains the quantity for the usage record to create
+try:
+    # Send metered usage belonging to this subscription and subscription item
+    api_response = api_instance.post_usage_records(subscription_id, subscription_item_id, create_usage_record)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AppStoreApi->post_usage_records: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **subscription_id** | [**str**](.md)| Unique identifier for Subscription object | 
+ **subscription_item_id** | [**str**](.md)| The unique identifier of the subscriptionItem | 
+ **create_usage_record** | [**CreateUsageRecord**](CreateUsageRecord.md)| Contains the quantity for the usage record to create | 
+
+### Return type
+
+[**UsageRecord**](UsageRecord.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+# **put_usage_records**
+> UsageRecord put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record)
+
+Update and existing metered usage belonging to this subscription and subscription item
+
+### Example
+
+* OAuth Authentication (OAuth2): 
+```python
+from xero_python.api_client import Configuration, ApiClient
+from xero_python.api_client.oauth2 import OAuth2Token
+from xero_python.exceptions import ApiException
+from xero_python.appstore import AppStoreApi
+from pprint import pprint
+
+# Configure OAuth2 access token for authorization: OAuth2
+# simplified version, `xero_oauth2_token` represents permanent global token storage
+xero_oauth2_token = {} # set to valid xero oauth2 token dictionary
+# create client configuration with client id and client secret for automatic token refresh
+api_config = Configuration(oauth2_token=OAuth2Token(
+    client_id="YOUR_API_CLIENT_ID", client_secret="YOUR_API_CLIENT_SECRET"
+))
+# configure xero-python sdk client
+api_client = ApiClient(
+    api_config,
+    oauth2_token_saver=lambda x: xero_oauth2_token.update(x),
+    oauth2_token_getter=lambda : xero_oauth2_token
+)
+# create an instance of the API class
+api_instance = AppStoreApi(api_client)
+
+subscription_id = '00000000-0000-0000-0000-000000000000' # str | Unique identifier for Subscription object
+subscription_item_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the subscriptionItem
+usage_record_id = '00000000-0000-0000-0000-000000000000' # str | The unique identifier of the usage record
+update_usage_record = { "quantity": 10 } # UpdateUsageRecord | Contains the quantity for the usage record to update
+try:
+    # Update and existing metered usage belonging to this subscription and subscription item
+    api_response = api_instance.put_usage_records(subscription_id, subscription_item_id, usage_record_id, update_usage_record)
+    pprint(api_response)
+except ApiException as e:
+    print("Exception when calling AppStoreApi->put_usage_records: %s\n" % e)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **subscription_id** | [**str**](.md)| Unique identifier for Subscription object | 
+ **subscription_item_id** | [**str**](.md)| The unique identifier of the subscriptionItem | 
+ **usage_record_id** | [**str**](.md)| The unique identifier of the usage record | 
+ **update_usage_record** | [**UpdateUsageRecord**](UpdateUsageRecord.md)| Contains the quantity for the usage record to update | 
+
+### Return type
+
+[**UsageRecord**](UsageRecord.md)
+
+### Authorization
+
+[OAuth2](../README.md#OAuth2)
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: application/json
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/xero_python/appstore/docs/CreateUsageRecord.md b/xero_python/appstore/docs/CreateUsageRecord.md
new file mode 100644
index 00000000..b570e578
--- /dev/null
+++ b/xero_python/appstore/docs/CreateUsageRecord.md
@@ -0,0 +1,11 @@
+# CreateUsageRecord
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**quantity** | **int** | The initial quantity for the usage record. Must be a whole number that is greater than or equal to 0 | 
+**timestamp** | **datetime** | DateTime in UTC of when the the product was consumed/used | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/xero_python/appstore/docs/UpdateUsageRecord.md b/xero_python/appstore/docs/UpdateUsageRecord.md
new file mode 100644
index 00000000..e22fc3b9
--- /dev/null
+++ b/xero_python/appstore/docs/UpdateUsageRecord.md
@@ -0,0 +1,10 @@
+# UpdateUsageRecord
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**quantity** | **int** | The new quantity for the usage record. Must be a whole number that is greater than or equal to 0 | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/xero_python/appstore/docs/UsageRecord.md b/xero_python/appstore/docs/UsageRecord.md
new file mode 100644
index 00000000..3f8339a3
--- /dev/null
+++ b/xero_python/appstore/docs/UsageRecord.md
@@ -0,0 +1,17 @@
+# UsageRecord
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**quantity** | **int** | The quantity recorded | 
+**subscription_id** | **str** | The unique identifier of the Subscription. | 
+**subscription_item_id** | **str** | The unique identifier of the SubscriptionItem. | 
+**test_mode** | **bool** | If the subscription is a test subscription | 
+**recorded_at** | **datetime** | The time when this usage was recorded in UTC | 
+**usage_record_id** | **str** | The unique identifier of the usageRecord. | 
+**price_per_unit** | **float** | The price per unit | 
+**product_id** | **str** | The unique identifier of the linked Product | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/xero_python/appstore/docs/UsageRecordsList.md b/xero_python/appstore/docs/UsageRecordsList.md
new file mode 100644
index 00000000..278ee3c6
--- /dev/null
+++ b/xero_python/appstore/docs/UsageRecordsList.md
@@ -0,0 +1,10 @@
+# UsageRecordsList
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**usage_records** | [**list[UsageRecord]**](UsageRecord.md) | A collection of usage records | 
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+
diff --git a/xero_python/appstore/models/__init__.py b/xero_python/appstore/models/__init__.py
index f0a6a556..7ebc8cd9 100644
--- a/xero_python/appstore/models/__init__.py
+++ b/xero_python/appstore/models/__init__.py
@@ -12,9 +12,13 @@
 
 
 # import models into model package
+from xero_python.appstore.models.create_usage_record import CreateUsageRecord
 from xero_python.appstore.models.plan import Plan
 from xero_python.appstore.models.price import Price
 from xero_python.appstore.models.problem_details import ProblemDetails
 from xero_python.appstore.models.product import Product
 from xero_python.appstore.models.subscription import Subscription
 from xero_python.appstore.models.subscription_item import SubscriptionItem
+from xero_python.appstore.models.update_usage_record import UpdateUsageRecord
+from xero_python.appstore.models.usage_record import UsageRecord
+from xero_python.appstore.models.usage_records_list import UsageRecordsList
diff --git a/xero_python/appstore/models/create_usage_record.py b/xero_python/appstore/models/create_usage_record.py
new file mode 100644
index 00000000..9eaad4e7
--- /dev/null
+++ b/xero_python/appstore/models/create_usage_record.py
@@ -0,0 +1,98 @@
+# coding: utf-8
+
+"""
+    Xero AppStore API
+
+    These endpoints are for Xero Partners to interact with the App Store Billing platform  # noqa: E501
+
+    Contact: api@xero.com
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import re  # noqa: F401
+
+from xero_python.models import BaseModel
+
+
+class CreateUsageRecord(BaseModel):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {"quantity": "int", "timestamp": "datetime"}
+
+    attribute_map = {"quantity": "quantity", "timestamp": "timestamp"}
+
+    def __init__(self, quantity=None, timestamp=None):  # noqa: E501
+        """CreateUsageRecord - a model defined in OpenAPI"""  # noqa: E501
+
+        self._quantity = None
+        self._timestamp = None
+        self.discriminator = None
+
+        self.quantity = quantity
+        self.timestamp = timestamp
+
+    @property
+    def quantity(self):
+        """Gets the quantity of this CreateUsageRecord.  # noqa: E501
+
+        The initial quantity for the usage record. Must be a whole number that is greater than or equal to 0  # noqa: E501
+
+        :return: The quantity of this CreateUsageRecord.  # noqa: E501
+        :rtype: int
+        """
+        return self._quantity
+
+    @quantity.setter
+    def quantity(self, quantity):
+        """Sets the quantity of this CreateUsageRecord.
+
+        The initial quantity for the usage record. Must be a whole number that is greater than or equal to 0  # noqa: E501
+
+        :param quantity: The quantity of this CreateUsageRecord.  # noqa: E501
+        :type: int
+        """
+        if quantity is None:
+            raise ValueError(
+                "Invalid value for `quantity`, must not be `None`"
+            )  # noqa: E501
+
+        self._quantity = quantity
+
+    @property
+    def timestamp(self):
+        """Gets the timestamp of this CreateUsageRecord.  # noqa: E501
+
+        DateTime in UTC of when the the product was consumed/used  # noqa: E501
+
+        :return: The timestamp of this CreateUsageRecord.  # noqa: E501
+        :rtype: datetime
+        """
+        return self._timestamp
+
+    @timestamp.setter
+    def timestamp(self, timestamp):
+        """Sets the timestamp of this CreateUsageRecord.
+
+        DateTime in UTC of when the the product was consumed/used  # noqa: E501
+
+        :param timestamp: The timestamp of this CreateUsageRecord.  # noqa: E501
+        :type: datetime
+        """
+        if timestamp is None:
+            raise ValueError(
+                "Invalid value for `timestamp`, must not be `None`"
+            )  # noqa: E501
+
+        self._timestamp = timestamp
diff --git a/xero_python/appstore/models/update_usage_record.py b/xero_python/appstore/models/update_usage_record.py
new file mode 100644
index 00000000..09a7a3b0
--- /dev/null
+++ b/xero_python/appstore/models/update_usage_record.py
@@ -0,0 +1,69 @@
+# coding: utf-8
+
+"""
+    Xero AppStore API
+
+    These endpoints are for Xero Partners to interact with the App Store Billing platform  # noqa: E501
+
+    Contact: api@xero.com
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import re  # noqa: F401
+
+from xero_python.models import BaseModel
+
+
+class UpdateUsageRecord(BaseModel):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {"quantity": "int"}
+
+    attribute_map = {"quantity": "quantity"}
+
+    def __init__(self, quantity=None):  # noqa: E501
+        """UpdateUsageRecord - a model defined in OpenAPI"""  # noqa: E501
+
+        self._quantity = None
+        self.discriminator = None
+
+        self.quantity = quantity
+
+    @property
+    def quantity(self):
+        """Gets the quantity of this UpdateUsageRecord.  # noqa: E501
+
+        The new quantity for the usage record. Must be a whole number that is greater than or equal to 0  # noqa: E501
+
+        :return: The quantity of this UpdateUsageRecord.  # noqa: E501
+        :rtype: int
+        """
+        return self._quantity
+
+    @quantity.setter
+    def quantity(self, quantity):
+        """Sets the quantity of this UpdateUsageRecord.
+
+        The new quantity for the usage record. Must be a whole number that is greater than or equal to 0  # noqa: E501
+
+        :param quantity: The quantity of this UpdateUsageRecord.  # noqa: E501
+        :type: int
+        """
+        if quantity is None:
+            raise ValueError(
+                "Invalid value for `quantity`, must not be `None`"
+            )  # noqa: E501
+
+        self._quantity = quantity
diff --git a/xero_python/appstore/models/usage_record.py b/xero_python/appstore/models/usage_record.py
new file mode 100644
index 00000000..5bf1ec3f
--- /dev/null
+++ b/xero_python/appstore/models/usage_record.py
@@ -0,0 +1,300 @@
+# coding: utf-8
+
+"""
+    Xero AppStore API
+
+    These endpoints are for Xero Partners to interact with the App Store Billing platform  # noqa: E501
+
+    Contact: api@xero.com
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import re  # noqa: F401
+
+from xero_python.models import BaseModel
+
+
+class UsageRecord(BaseModel):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {
+        "quantity": "int",
+        "subscription_id": "str",
+        "subscription_item_id": "str",
+        "test_mode": "bool",
+        "recorded_at": "datetime",
+        "usage_record_id": "str",
+        "price_per_unit": "float",
+        "product_id": "str",
+    }
+
+    attribute_map = {
+        "quantity": "quantity",
+        "subscription_id": "subscriptionId",
+        "subscription_item_id": "subscriptionItemId",
+        "test_mode": "testMode",
+        "recorded_at": "recordedAt",
+        "usage_record_id": "usageRecordId",
+        "price_per_unit": "pricePerUnit",
+        "product_id": "productId",
+    }
+
+    def __init__(
+        self,
+        quantity=None,
+        subscription_id=None,
+        subscription_item_id=None,
+        test_mode=None,
+        recorded_at=None,
+        usage_record_id=None,
+        price_per_unit=None,
+        product_id=None,
+    ):  # noqa: E501
+        """UsageRecord - a model defined in OpenAPI"""  # noqa: E501
+
+        self._quantity = None
+        self._subscription_id = None
+        self._subscription_item_id = None
+        self._test_mode = None
+        self._recorded_at = None
+        self._usage_record_id = None
+        self._price_per_unit = None
+        self._product_id = None
+        self.discriminator = None
+
+        self.quantity = quantity
+        self.subscription_id = subscription_id
+        self.subscription_item_id = subscription_item_id
+        self.test_mode = test_mode
+        self.recorded_at = recorded_at
+        self.usage_record_id = usage_record_id
+        self.price_per_unit = price_per_unit
+        self.product_id = product_id
+
+    @property
+    def quantity(self):
+        """Gets the quantity of this UsageRecord.  # noqa: E501
+
+        The quantity recorded  # noqa: E501
+
+        :return: The quantity of this UsageRecord.  # noqa: E501
+        :rtype: int
+        """
+        return self._quantity
+
+    @quantity.setter
+    def quantity(self, quantity):
+        """Sets the quantity of this UsageRecord.
+
+        The quantity recorded  # noqa: E501
+
+        :param quantity: The quantity of this UsageRecord.  # noqa: E501
+        :type: int
+        """
+        if quantity is None:
+            raise ValueError(
+                "Invalid value for `quantity`, must not be `None`"
+            )  # noqa: E501
+
+        self._quantity = quantity
+
+    @property
+    def subscription_id(self):
+        """Gets the subscription_id of this UsageRecord.  # noqa: E501
+
+        The unique identifier of the Subscription.  # noqa: E501
+
+        :return: The subscription_id of this UsageRecord.  # noqa: E501
+        :rtype: str
+        """
+        return self._subscription_id
+
+    @subscription_id.setter
+    def subscription_id(self, subscription_id):
+        """Sets the subscription_id of this UsageRecord.
+
+        The unique identifier of the Subscription.  # noqa: E501
+
+        :param subscription_id: The subscription_id of this UsageRecord.  # noqa: E501
+        :type: str
+        """
+        if subscription_id is None:
+            raise ValueError(
+                "Invalid value for `subscription_id`, must not be `None`"
+            )  # noqa: E501
+
+        self._subscription_id = subscription_id
+
+    @property
+    def subscription_item_id(self):
+        """Gets the subscription_item_id of this UsageRecord.  # noqa: E501
+
+        The unique identifier of the SubscriptionItem.  # noqa: E501
+
+        :return: The subscription_item_id of this UsageRecord.  # noqa: E501
+        :rtype: str
+        """
+        return self._subscription_item_id
+
+    @subscription_item_id.setter
+    def subscription_item_id(self, subscription_item_id):
+        """Sets the subscription_item_id of this UsageRecord.
+
+        The unique identifier of the SubscriptionItem.  # noqa: E501
+
+        :param subscription_item_id: The subscription_item_id of this UsageRecord.  # noqa: E501
+        :type: str
+        """
+        if subscription_item_id is None:
+            raise ValueError(
+                "Invalid value for `subscription_item_id`, must not be `None`"
+            )  # noqa: E501
+
+        self._subscription_item_id = subscription_item_id
+
+    @property
+    def test_mode(self):
+        """Gets the test_mode of this UsageRecord.  # noqa: E501
+
+        If the subscription is a test subscription  # noqa: E501
+
+        :return: The test_mode of this UsageRecord.  # noqa: E501
+        :rtype: bool
+        """
+        return self._test_mode
+
+    @test_mode.setter
+    def test_mode(self, test_mode):
+        """Sets the test_mode of this UsageRecord.
+
+        If the subscription is a test subscription  # noqa: E501
+
+        :param test_mode: The test_mode of this UsageRecord.  # noqa: E501
+        :type: bool
+        """
+        if test_mode is None:
+            raise ValueError(
+                "Invalid value for `test_mode`, must not be `None`"
+            )  # noqa: E501
+
+        self._test_mode = test_mode
+
+    @property
+    def recorded_at(self):
+        """Gets the recorded_at of this UsageRecord.  # noqa: E501
+
+        The time when this usage was recorded in UTC  # noqa: E501
+
+        :return: The recorded_at of this UsageRecord.  # noqa: E501
+        :rtype: datetime
+        """
+        return self._recorded_at
+
+    @recorded_at.setter
+    def recorded_at(self, recorded_at):
+        """Sets the recorded_at of this UsageRecord.
+
+        The time when this usage was recorded in UTC  # noqa: E501
+
+        :param recorded_at: The recorded_at of this UsageRecord.  # noqa: E501
+        :type: datetime
+        """
+        if recorded_at is None:
+            raise ValueError(
+                "Invalid value for `recorded_at`, must not be `None`"
+            )  # noqa: E501
+
+        self._recorded_at = recorded_at
+
+    @property
+    def usage_record_id(self):
+        """Gets the usage_record_id of this UsageRecord.  # noqa: E501
+
+        The unique identifier of the usageRecord.  # noqa: E501
+
+        :return: The usage_record_id of this UsageRecord.  # noqa: E501
+        :rtype: str
+        """
+        return self._usage_record_id
+
+    @usage_record_id.setter
+    def usage_record_id(self, usage_record_id):
+        """Sets the usage_record_id of this UsageRecord.
+
+        The unique identifier of the usageRecord.  # noqa: E501
+
+        :param usage_record_id: The usage_record_id of this UsageRecord.  # noqa: E501
+        :type: str
+        """
+        if usage_record_id is None:
+            raise ValueError(
+                "Invalid value for `usage_record_id`, must not be `None`"
+            )  # noqa: E501
+
+        self._usage_record_id = usage_record_id
+
+    @property
+    def price_per_unit(self):
+        """Gets the price_per_unit of this UsageRecord.  # noqa: E501
+
+        The price per unit  # noqa: E501
+
+        :return: The price_per_unit of this UsageRecord.  # noqa: E501
+        :rtype: float
+        """
+        return self._price_per_unit
+
+    @price_per_unit.setter
+    def price_per_unit(self, price_per_unit):
+        """Sets the price_per_unit of this UsageRecord.
+
+        The price per unit  # noqa: E501
+
+        :param price_per_unit: The price_per_unit of this UsageRecord.  # noqa: E501
+        :type: float
+        """
+        if price_per_unit is None:
+            raise ValueError(
+                "Invalid value for `price_per_unit`, must not be `None`"
+            )  # noqa: E501
+
+        self._price_per_unit = price_per_unit
+
+    @property
+    def product_id(self):
+        """Gets the product_id of this UsageRecord.  # noqa: E501
+
+        The unique identifier of the linked Product  # noqa: E501
+
+        :return: The product_id of this UsageRecord.  # noqa: E501
+        :rtype: str
+        """
+        return self._product_id
+
+    @product_id.setter
+    def product_id(self, product_id):
+        """Sets the product_id of this UsageRecord.
+
+        The unique identifier of the linked Product  # noqa: E501
+
+        :param product_id: The product_id of this UsageRecord.  # noqa: E501
+        :type: str
+        """
+        if product_id is None:
+            raise ValueError(
+                "Invalid value for `product_id`, must not be `None`"
+            )  # noqa: E501
+
+        self._product_id = product_id
diff --git a/xero_python/appstore/models/usage_records_list.py b/xero_python/appstore/models/usage_records_list.py
new file mode 100644
index 00000000..81f7b62b
--- /dev/null
+++ b/xero_python/appstore/models/usage_records_list.py
@@ -0,0 +1,69 @@
+# coding: utf-8
+
+"""
+    Xero AppStore API
+
+    These endpoints are for Xero Partners to interact with the App Store Billing platform  # noqa: E501
+
+    Contact: api@xero.com
+    Generated by: https://openapi-generator.tech
+"""
+
+
+import re  # noqa: F401
+
+from xero_python.models import BaseModel
+
+
+class UsageRecordsList(BaseModel):
+    """NOTE: This class is auto generated by OpenAPI Generator.
+    Ref: https://openapi-generator.tech
+
+    Do not edit the class manually.
+    """
+
+    """
+    Attributes:
+      openapi_types (dict): The key is attribute name
+                            and the value is attribute type.
+      attribute_map (dict): The key is attribute name
+                            and the value is json key in definition.
+    """
+    openapi_types = {"usage_records": "list[UsageRecord]"}
+
+    attribute_map = {"usage_records": "usageRecords"}
+
+    def __init__(self, usage_records=None):  # noqa: E501
+        """UsageRecordsList - a model defined in OpenAPI"""  # noqa: E501
+
+        self._usage_records = None
+        self.discriminator = None
+
+        self.usage_records = usage_records
+
+    @property
+    def usage_records(self):
+        """Gets the usage_records of this UsageRecordsList.  # noqa: E501
+
+        A collection of usage records  # noqa: E501
+
+        :return: The usage_records of this UsageRecordsList.  # noqa: E501
+        :rtype: list[UsageRecord]
+        """
+        return self._usage_records
+
+    @usage_records.setter
+    def usage_records(self, usage_records):
+        """Sets the usage_records of this UsageRecordsList.
+
+        A collection of usage records  # noqa: E501
+
+        :param usage_records: The usage_records of this UsageRecordsList.  # noqa: E501
+        :type: list[UsageRecord]
+        """
+        if usage_records is None:
+            raise ValueError(
+                "Invalid value for `usage_records`, must not be `None`"
+            )  # noqa: E501
+
+        self._usage_records = usage_records
diff --git a/xero_python/assets/api/asset_api.py b/xero_python/assets/api/asset_api.py
index 88250cbb..64b20f2d 100644
--- a/xero_python/assets/api/asset_api.py
+++ b/xero_python/assets/api/asset_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/docs/README.md b/xero_python/docs/README.md
index 42143eb8..4caf8606 100644
--- a/xero_python/docs/README.md
+++ b/xero_python/docs/README.md
@@ -3,8 +3,8 @@ These endpoints are related to managing authentication tokens and identity for X
 
 The `xero_python` package is automatically generated by the [XeroAPI SDK 2.0 Codegen](https://github.com/xero-github/xeroapi-sdk-codegen) project:
 
-- API version: 2.30.1
-- Package version: 1.19.0
+- API version: 2.31.0
+- Package version: 1.20.0
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 For more information, please visit [https://developer.xero.com](https://developer.xero.com)
 
diff --git a/xero_python/file/api/files_api.py b/xero_python/file/api/files_api.py
index 0ec74f17..1bf186db 100644
--- a/xero_python/file/api/files_api.py
+++ b/xero_python/file/api/files_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/finance/api/finance_api.py b/xero_python/finance/api/finance_api.py
index 320c8293..d2122b5a 100644
--- a/xero_python/finance/api/finance_api.py
+++ b/xero_python/finance/api/finance_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/identity/api/identity_api.py b/xero_python/identity/api/identity_api.py
index 364d429c..0378f40b 100644
--- a/xero_python/identity/api/identity_api.py
+++ b/xero_python/identity/api/identity_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/payrollau/api/payroll_au_api.py b/xero_python/payrollau/api/payroll_au_api.py
index 8d1a9ea1..f3d4915d 100644
--- a/xero_python/payrollau/api/payroll_au_api.py
+++ b/xero_python/payrollau/api/payroll_au_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/payrollnz/api/payroll_nz_api.py b/xero_python/payrollnz/api/payroll_nz_api.py
index 545720f3..cb4c2f96 100644
--- a/xero_python/payrollnz/api/payroll_nz_api.py
+++ b/xero_python/payrollnz/api/payroll_nz_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/payrolluk/api/payroll_uk_api.py b/xero_python/payrolluk/api/payroll_uk_api.py
index 60429bfb..744c0e40 100644
--- a/xero_python/payrolluk/api/payroll_uk_api.py
+++ b/xero_python/payrolluk/api/payroll_uk_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib
diff --git a/xero_python/project/api/project_api.py b/xero_python/project/api/project_api.py
index 79860bf3..49f9e3a8 100644
--- a/xero_python/project/api/project_api.py
+++ b/xero_python/project/api/project_api.py
@@ -10,7 +10,7 @@
 """
 
 """
-    OpenAPI spec version: 2.30.1
+    OpenAPI spec version: 2.31.0
 """
 
 import importlib