diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c37434e..2969a75 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.110.0"
+  ".": "0.111.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 52a1884..ebb8318 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
-configured_endpoints: 240
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-c9957e6ab1c9adef0dfb9a3956c8e7505a1661d22e79531eaee71b2a3a699b61.yml
-openapi_spec_hash: 1190741469af674747df81908239a601
-config_hash: 82cb0fb1fae47b3467cd6da4273541de
+configured_endpoints: 241
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/increase%2Fincrease-ecd0cee565701f1d47c0db3efed2734f1195f60e5767c9c5f67ddb5de5e6abf1.yml
+openapi_spec_hash: d9205bf9cc1ce52d0d046007318761a1
+config_hash: cb5b8736705c06b670f6a25484622d62
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6e924e..77e221c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.111.0 (2026-04-13)
+
+Full Changelog: [v0.110.0...v0.111.0](https://github.com/Increase/increase-php/compare/v0.110.0...v0.111.0)
+
+### Features
+
+* **api:** api update ([20985e1](https://github.com/Increase/increase-php/commit/20985e1959f15994fa384a87e83c1d2892adba7f))
+
 ## 0.110.0 (2026-04-13)
 
 Full Changelog: [v0.109.0...v0.110.0](https://github.com/Increase/increase-php/compare/v0.109.0...v0.110.0)
diff --git a/README.md b/README.md
index 8f34e62..d12566c 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ The REST API documentation can be found on [increase.com](https://increase.com/d
 <!-- x-release-please-start-version -->
 
 ```
-composer require "increase/increase 0.110.0"
+composer require "increase/increase 0.111.0"
 ```
 
 <!-- x-release-please-end -->
diff --git a/src/ServiceContracts/Simulations/CardPurchaseSupplementsContract.php b/src/ServiceContracts/Simulations/CardPurchaseSupplementsContract.php
new file mode 100644
index 0000000..1980b6d
--- /dev/null
+++ b/src/ServiceContracts/Simulations/CardPurchaseSupplementsContract.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\ServiceContracts\Simulations;
+
+use Increase\CardPurchaseSupplements\CardPurchaseSupplement;
+use Increase\Core\Exceptions\APIException;
+use Increase\RequestOptions;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem;
+
+/**
+ * @phpstan-import-type InvoiceShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice
+ * @phpstan-import-type LineItemShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem
+ * @phpstan-import-type RequestOpts from \Increase\RequestOptions
+ */
+interface CardPurchaseSupplementsContract
+{
+    /**
+     * @api
+     *
+     * @param string $transactionID The identifier of the Transaction to create a Card Purchase Supplement for. The Transaction must have a source of type `card_settlement`.
+     * @param Invoice|InvoiceShape $invoice invoice-level information about the payment
+     * @param list<LineItem|LineItemShape> $lineItems line item information, such as individual products purchased
+     * @param RequestOpts|null $requestOptions
+     *
+     * @throws APIException
+     */
+    public function create(
+        string $transactionID,
+        Invoice|array|null $invoice = null,
+        ?array $lineItems = null,
+        RequestOptions|array|null $requestOptions = null,
+    ): CardPurchaseSupplement;
+}
diff --git a/src/ServiceContracts/Simulations/CardPurchaseSupplementsRawContract.php b/src/ServiceContracts/Simulations/CardPurchaseSupplementsRawContract.php
new file mode 100644
index 0000000..e0cd9c7
--- /dev/null
+++ b/src/ServiceContracts/Simulations/CardPurchaseSupplementsRawContract.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\ServiceContracts\Simulations;
+
+use Increase\CardPurchaseSupplements\CardPurchaseSupplement;
+use Increase\Core\Contracts\BaseResponse;
+use Increase\Core\Exceptions\APIException;
+use Increase\RequestOptions;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams;
+
+/**
+ * @phpstan-import-type RequestOpts from \Increase\RequestOptions
+ */
+interface CardPurchaseSupplementsRawContract
+{
+    /**
+     * @api
+     *
+     * @param array<string,mixed>|CardPurchaseSupplementCreateParams $params
+     * @param RequestOpts|null $requestOptions
+     *
+     * @return BaseResponse<CardPurchaseSupplement>
+     *
+     * @throws APIException
+     */
+    public function create(
+        array|CardPurchaseSupplementCreateParams $params,
+        RequestOptions|array|null $requestOptions = null,
+    ): BaseResponse;
+}
diff --git a/src/Services/Simulations/CardPurchaseSupplementsRawService.php b/src/Services/Simulations/CardPurchaseSupplementsRawService.php
new file mode 100644
index 0000000..60a0def
--- /dev/null
+++ b/src/Services/Simulations/CardPurchaseSupplementsRawService.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\Services\Simulations;
+
+use Increase\CardPurchaseSupplements\CardPurchaseSupplement;
+use Increase\Client;
+use Increase\Core\Contracts\BaseResponse;
+use Increase\Core\Exceptions\APIException;
+use Increase\RequestOptions;
+use Increase\ServiceContracts\Simulations\CardPurchaseSupplementsRawContract;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem;
+
+/**
+ * @phpstan-import-type InvoiceShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice
+ * @phpstan-import-type LineItemShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem
+ * @phpstan-import-type RequestOpts from \Increase\RequestOptions
+ */
+final class CardPurchaseSupplementsRawService implements CardPurchaseSupplementsRawContract
+{
+    // @phpstan-ignore-next-line
+    /**
+     * @internal
+     */
+    public function __construct(private Client $client) {}
+
+    /**
+     * @api
+     *
+     * Simulates the creation of a Card Purchase Supplement (Level 3 data) for a card settlement. This happens asynchronously in production when Visa sends enhanced transaction data about a purchase.
+     *
+     * @param array{
+     *   transactionID: string,
+     *   invoice?: Invoice|InvoiceShape,
+     *   lineItems?: list<LineItem|LineItemShape>,
+     * }|CardPurchaseSupplementCreateParams $params
+     * @param RequestOpts|null $requestOptions
+     *
+     * @return BaseResponse<CardPurchaseSupplement>
+     *
+     * @throws APIException
+     */
+    public function create(
+        array|CardPurchaseSupplementCreateParams $params,
+        RequestOptions|array|null $requestOptions = null,
+    ): BaseResponse {
+        [$parsed, $options] = CardPurchaseSupplementCreateParams::parseRequest(
+            $params,
+            $requestOptions,
+        );
+
+        // @phpstan-ignore-next-line return.type
+        return $this->client->request(
+            method: 'post',
+            path: 'simulations/card_purchase_supplements',
+            body: (object) $parsed,
+            options: $options,
+            convert: CardPurchaseSupplement::class,
+        );
+    }
+}
diff --git a/src/Services/Simulations/CardPurchaseSupplementsService.php b/src/Services/Simulations/CardPurchaseSupplementsService.php
new file mode 100644
index 0000000..b12c0c4
--- /dev/null
+++ b/src/Services/Simulations/CardPurchaseSupplementsService.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\Services\Simulations;
+
+use Increase\CardPurchaseSupplements\CardPurchaseSupplement;
+use Increase\Client;
+use Increase\Core\Exceptions\APIException;
+use Increase\Core\Util;
+use Increase\RequestOptions;
+use Increase\ServiceContracts\Simulations\CardPurchaseSupplementsContract;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem;
+
+/**
+ * @phpstan-import-type InvoiceShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice
+ * @phpstan-import-type LineItemShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem
+ * @phpstan-import-type RequestOpts from \Increase\RequestOptions
+ */
+final class CardPurchaseSupplementsService implements CardPurchaseSupplementsContract
+{
+    /**
+     * @api
+     */
+    public CardPurchaseSupplementsRawService $raw;
+
+    /**
+     * @internal
+     */
+    public function __construct(private Client $client)
+    {
+        $this->raw = new CardPurchaseSupplementsRawService($client);
+    }
+
+    /**
+     * @api
+     *
+     * Simulates the creation of a Card Purchase Supplement (Level 3 data) for a card settlement. This happens asynchronously in production when Visa sends enhanced transaction data about a purchase.
+     *
+     * @param string $transactionID The identifier of the Transaction to create a Card Purchase Supplement for. The Transaction must have a source of type `card_settlement`.
+     * @param Invoice|InvoiceShape $invoice invoice-level information about the payment
+     * @param list<LineItem|LineItemShape> $lineItems line item information, such as individual products purchased
+     * @param RequestOpts|null $requestOptions
+     *
+     * @throws APIException
+     */
+    public function create(
+        string $transactionID,
+        Invoice|array|null $invoice = null,
+        ?array $lineItems = null,
+        RequestOptions|array|null $requestOptions = null,
+    ): CardPurchaseSupplement {
+        $params = Util::removeNulls(
+            [
+                'transactionID' => $transactionID,
+                'invoice' => $invoice,
+                'lineItems' => $lineItems,
+            ],
+        );
+
+        // @phpstan-ignore-next-line argument.type
+        $response = $this->raw->create(params: $params, requestOptions: $requestOptions);
+
+        return $response->parse();
+    }
+}
diff --git a/src/Services/SimulationsService.php b/src/Services/SimulationsService.php
index 6586446..7d4b1e2 100644
--- a/src/Services/SimulationsService.php
+++ b/src/Services/SimulationsService.php
@@ -15,6 +15,7 @@
 use Increase\Services\Simulations\CardDisputesService;
 use Increase\Services\Simulations\CardFuelConfirmationsService;
 use Increase\Services\Simulations\CardIncrementsService;
+use Increase\Services\Simulations\CardPurchaseSupplementsService;
 use Increase\Services\Simulations\CardRefundsService;
 use Increase\Services\Simulations\CardReversalsService;
 use Increase\Services\Simulations\CardSettlementsService;
@@ -96,6 +97,11 @@ final class SimulationsService implements SimulationsContract
      */
     public CardAuthenticationsService $cardAuthentications;
 
+    /**
+     * @api
+     */
+    public CardPurchaseSupplementsService $cardPurchaseSupplements;
+
     /**
      * @api
      */
@@ -222,6 +228,7 @@ public function __construct(private Client $client)
         $this->cardFuelConfirmations = new CardFuelConfirmationsService($client);
         $this->cardRefunds = new CardRefundsService($client);
         $this->cardAuthentications = new CardAuthenticationsService($client);
+        $this->cardPurchaseSupplements = new CardPurchaseSupplementsService($client);
         $this->cardDisputes = new CardDisputesService($client);
         $this->physicalCards = new PhysicalCardsService($client);
         $this->digitalWalletTokenRequests = new DigitalWalletTokenRequestsService($client);
diff --git a/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams.php b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams.php
new file mode 100644
index 0000000..f56212b
--- /dev/null
+++ b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams.php
@@ -0,0 +1,133 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\Simulations\CardPurchaseSupplements;
+
+use Increase\Core\Attributes\Optional;
+use Increase\Core\Attributes\Required;
+use Increase\Core\Concerns\SdkModel;
+use Increase\Core\Concerns\SdkParams;
+use Increase\Core\Contracts\BaseModel;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice;
+use Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem;
+
+/**
+ * Simulates the creation of a Card Purchase Supplement (Level 3 data) for a card settlement. This happens asynchronously in production when Visa sends enhanced transaction data about a purchase.
+ *
+ * @see Increase\Services\Simulations\CardPurchaseSupplementsService::create()
+ *
+ * @phpstan-import-type InvoiceShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\Invoice
+ * @phpstan-import-type LineItemShape from \Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams\LineItem
+ *
+ * @phpstan-type CardPurchaseSupplementCreateParamsShape = array{
+ *   transactionID: string,
+ *   invoice?: null|Invoice|InvoiceShape,
+ *   lineItems?: list<LineItem|LineItemShape>|null,
+ * }
+ */
+final class CardPurchaseSupplementCreateParams implements BaseModel
+{
+    /** @use SdkModel<CardPurchaseSupplementCreateParamsShape> */
+    use SdkModel;
+    use SdkParams;
+
+    /**
+     * The identifier of the Transaction to create a Card Purchase Supplement for. The Transaction must have a source of type `card_settlement`.
+     */
+    #[Required('transaction_id')]
+    public string $transactionID;
+
+    /**
+     * Invoice-level information about the payment.
+     */
+    #[Optional]
+    public ?Invoice $invoice;
+
+    /**
+     * Line item information, such as individual products purchased.
+     *
+     * @var list<LineItem>|null $lineItems
+     */
+    #[Optional('line_items', list: LineItem::class)]
+    public ?array $lineItems;
+
+    /**
+     * `new CardPurchaseSupplementCreateParams()` is missing required properties by the API.
+     *
+     * To enforce required parameters use
+     * ```
+     * CardPurchaseSupplementCreateParams::with(transactionID: ...)
+     * ```
+     *
+     * Otherwise ensure the following setters are called
+     *
+     * ```
+     * (new CardPurchaseSupplementCreateParams)->withTransactionID(...)
+     * ```
+     */
+    public function __construct()
+    {
+        $this->initialize();
+    }
+
+    /**
+     * Construct an instance from the required parameters.
+     *
+     * You must use named parameters to construct any parameters with a default value.
+     *
+     * @param Invoice|InvoiceShape|null $invoice
+     * @param list<LineItem|LineItemShape>|null $lineItems
+     */
+    public static function with(
+        string $transactionID,
+        Invoice|array|null $invoice = null,
+        ?array $lineItems = null,
+    ): self {
+        $self = new self;
+
+        $self['transactionID'] = $transactionID;
+
+        null !== $invoice && $self['invoice'] = $invoice;
+        null !== $lineItems && $self['lineItems'] = $lineItems;
+
+        return $self;
+    }
+
+    /**
+     * The identifier of the Transaction to create a Card Purchase Supplement for. The Transaction must have a source of type `card_settlement`.
+     */
+    public function withTransactionID(string $transactionID): self
+    {
+        $self = clone $this;
+        $self['transactionID'] = $transactionID;
+
+        return $self;
+    }
+
+    /**
+     * Invoice-level information about the payment.
+     *
+     * @param Invoice|InvoiceShape $invoice
+     */
+    public function withInvoice(Invoice|array $invoice): self
+    {
+        $self = clone $this;
+        $self['invoice'] = $invoice;
+
+        return $self;
+    }
+
+    /**
+     * Line item information, such as individual products purchased.
+     *
+     * @param list<LineItem|LineItemShape> $lineItems
+     */
+    public function withLineItems(array $lineItems): self
+    {
+        $self = clone $this;
+        $self['lineItems'] = $lineItems;
+
+        return $self;
+    }
+}
diff --git a/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/Invoice.php b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/Invoice.php
new file mode 100644
index 0000000..1a4a1ad
--- /dev/null
+++ b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/Invoice.php
@@ -0,0 +1,243 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams;
+
+use Increase\Core\Attributes\Optional;
+use Increase\Core\Concerns\SdkModel;
+use Increase\Core\Contracts\BaseModel;
+
+/**
+ * Invoice-level information about the payment.
+ *
+ * @phpstan-type InvoiceShape = array{
+ *   discountAmount?: int|null,
+ *   dutyTaxAmount?: int|null,
+ *   orderDate?: string|null,
+ *   shippingAmount?: int|null,
+ *   shippingDestinationCountryCode?: string|null,
+ *   shippingDestinationPostalCode?: string|null,
+ *   shippingSourcePostalCode?: string|null,
+ *   shippingTaxAmount?: int|null,
+ *   shippingTaxRate?: string|null,
+ *   uniqueValueAddedTaxInvoiceReference?: string|null,
+ * }
+ */
+final class Invoice implements BaseModel
+{
+    /** @use SdkModel<InvoiceShape> */
+    use SdkModel;
+
+    /**
+     * Discount given to cardholder.
+     */
+    #[Optional('discount_amount')]
+    public ?int $discountAmount;
+
+    /**
+     * Amount of duty taxes.
+     */
+    #[Optional('duty_tax_amount')]
+    public ?int $dutyTaxAmount;
+
+    /**
+     * Date the order was taken.
+     */
+    #[Optional('order_date')]
+    public ?string $orderDate;
+
+    /**
+     * The shipping cost.
+     */
+    #[Optional('shipping_amount')]
+    public ?int $shippingAmount;
+
+    /**
+     * Country code of the shipping destination.
+     */
+    #[Optional('shipping_destination_country_code')]
+    public ?string $shippingDestinationCountryCode;
+
+    /**
+     * Postal code of the shipping destination.
+     */
+    #[Optional('shipping_destination_postal_code')]
+    public ?string $shippingDestinationPostalCode;
+
+    /**
+     * Postal code of the location being shipped from.
+     */
+    #[Optional('shipping_source_postal_code')]
+    public ?string $shippingSourcePostalCode;
+
+    /**
+     * Taxes paid for freight and shipping.
+     */
+    #[Optional('shipping_tax_amount')]
+    public ?int $shippingTaxAmount;
+
+    /**
+     * Tax rate for freight and shipping.
+     */
+    #[Optional('shipping_tax_rate')]
+    public ?string $shippingTaxRate;
+
+    /**
+     * Value added tax invoice reference number.
+     */
+    #[Optional('unique_value_added_tax_invoice_reference')]
+    public ?string $uniqueValueAddedTaxInvoiceReference;
+
+    public function __construct()
+    {
+        $this->initialize();
+    }
+
+    /**
+     * Construct an instance from the required parameters.
+     *
+     * You must use named parameters to construct any parameters with a default value.
+     */
+    public static function with(
+        ?int $discountAmount = null,
+        ?int $dutyTaxAmount = null,
+        ?string $orderDate = null,
+        ?int $shippingAmount = null,
+        ?string $shippingDestinationCountryCode = null,
+        ?string $shippingDestinationPostalCode = null,
+        ?string $shippingSourcePostalCode = null,
+        ?int $shippingTaxAmount = null,
+        ?string $shippingTaxRate = null,
+        ?string $uniqueValueAddedTaxInvoiceReference = null,
+    ): self {
+        $self = new self;
+
+        null !== $discountAmount && $self['discountAmount'] = $discountAmount;
+        null !== $dutyTaxAmount && $self['dutyTaxAmount'] = $dutyTaxAmount;
+        null !== $orderDate && $self['orderDate'] = $orderDate;
+        null !== $shippingAmount && $self['shippingAmount'] = $shippingAmount;
+        null !== $shippingDestinationCountryCode && $self['shippingDestinationCountryCode'] = $shippingDestinationCountryCode;
+        null !== $shippingDestinationPostalCode && $self['shippingDestinationPostalCode'] = $shippingDestinationPostalCode;
+        null !== $shippingSourcePostalCode && $self['shippingSourcePostalCode'] = $shippingSourcePostalCode;
+        null !== $shippingTaxAmount && $self['shippingTaxAmount'] = $shippingTaxAmount;
+        null !== $shippingTaxRate && $self['shippingTaxRate'] = $shippingTaxRate;
+        null !== $uniqueValueAddedTaxInvoiceReference && $self['uniqueValueAddedTaxInvoiceReference'] = $uniqueValueAddedTaxInvoiceReference;
+
+        return $self;
+    }
+
+    /**
+     * Discount given to cardholder.
+     */
+    public function withDiscountAmount(int $discountAmount): self
+    {
+        $self = clone $this;
+        $self['discountAmount'] = $discountAmount;
+
+        return $self;
+    }
+
+    /**
+     * Amount of duty taxes.
+     */
+    public function withDutyTaxAmount(int $dutyTaxAmount): self
+    {
+        $self = clone $this;
+        $self['dutyTaxAmount'] = $dutyTaxAmount;
+
+        return $self;
+    }
+
+    /**
+     * Date the order was taken.
+     */
+    public function withOrderDate(string $orderDate): self
+    {
+        $self = clone $this;
+        $self['orderDate'] = $orderDate;
+
+        return $self;
+    }
+
+    /**
+     * The shipping cost.
+     */
+    public function withShippingAmount(int $shippingAmount): self
+    {
+        $self = clone $this;
+        $self['shippingAmount'] = $shippingAmount;
+
+        return $self;
+    }
+
+    /**
+     * Country code of the shipping destination.
+     */
+    public function withShippingDestinationCountryCode(
+        string $shippingDestinationCountryCode
+    ): self {
+        $self = clone $this;
+        $self['shippingDestinationCountryCode'] = $shippingDestinationCountryCode;
+
+        return $self;
+    }
+
+    /**
+     * Postal code of the shipping destination.
+     */
+    public function withShippingDestinationPostalCode(
+        string $shippingDestinationPostalCode
+    ): self {
+        $self = clone $this;
+        $self['shippingDestinationPostalCode'] = $shippingDestinationPostalCode;
+
+        return $self;
+    }
+
+    /**
+     * Postal code of the location being shipped from.
+     */
+    public function withShippingSourcePostalCode(
+        string $shippingSourcePostalCode
+    ): self {
+        $self = clone $this;
+        $self['shippingSourcePostalCode'] = $shippingSourcePostalCode;
+
+        return $self;
+    }
+
+    /**
+     * Taxes paid for freight and shipping.
+     */
+    public function withShippingTaxAmount(int $shippingTaxAmount): self
+    {
+        $self = clone $this;
+        $self['shippingTaxAmount'] = $shippingTaxAmount;
+
+        return $self;
+    }
+
+    /**
+     * Tax rate for freight and shipping.
+     */
+    public function withShippingTaxRate(string $shippingTaxRate): self
+    {
+        $self = clone $this;
+        $self['shippingTaxRate'] = $shippingTaxRate;
+
+        return $self;
+    }
+
+    /**
+     * Value added tax invoice reference number.
+     */
+    public function withUniqueValueAddedTaxInvoiceReference(
+        string $uniqueValueAddedTaxInvoiceReference
+    ): self {
+        $self = clone $this;
+        $self['uniqueValueAddedTaxInvoiceReference'] = $uniqueValueAddedTaxInvoiceReference;
+
+        return $self;
+    }
+}
diff --git a/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/LineItem.php b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/LineItem.php
new file mode 100644
index 0000000..f148a20
--- /dev/null
+++ b/src/Simulations/CardPurchaseSupplements/CardPurchaseSupplementCreateParams/LineItem.php
@@ -0,0 +1,237 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Increase\Simulations\CardPurchaseSupplements\CardPurchaseSupplementCreateParams;
+
+use Increase\Core\Attributes\Optional;
+use Increase\Core\Concerns\SdkModel;
+use Increase\Core\Contracts\BaseModel;
+
+/**
+ * @phpstan-type LineItemShape = array{
+ *   discountAmount?: int|null,
+ *   itemCommodityCode?: string|null,
+ *   itemDescriptor?: string|null,
+ *   itemQuantity?: string|null,
+ *   productCode?: string|null,
+ *   salesTaxAmount?: int|null,
+ *   salesTaxRate?: string|null,
+ *   totalAmount?: int|null,
+ *   unitCost?: string|null,
+ *   unitOfMeasureCode?: string|null,
+ * }
+ */
+final class LineItem implements BaseModel
+{
+    /** @use SdkModel<LineItemShape> */
+    use SdkModel;
+
+    /**
+     * Discount amount for this specific line item.
+     */
+    #[Optional('discount_amount')]
+    public ?int $discountAmount;
+
+    /**
+     * Code used to categorize the purchase item.
+     */
+    #[Optional('item_commodity_code')]
+    public ?string $itemCommodityCode;
+
+    /**
+     * Description of the purchase item.
+     */
+    #[Optional('item_descriptor')]
+    public ?string $itemDescriptor;
+
+    /**
+     * The number of units of the product being purchased.
+     */
+    #[Optional('item_quantity')]
+    public ?string $itemQuantity;
+
+    /**
+     * Code used to categorize the product being purchased.
+     */
+    #[Optional('product_code')]
+    public ?string $productCode;
+
+    /**
+     * Sales tax amount for this line item.
+     */
+    #[Optional('sales_tax_amount')]
+    public ?int $salesTaxAmount;
+
+    /**
+     * Sales tax rate for this line item.
+     */
+    #[Optional('sales_tax_rate')]
+    public ?string $salesTaxRate;
+
+    /**
+     * Total amount of all line items.
+     */
+    #[Optional('total_amount')]
+    public ?int $totalAmount;
+
+    /**
+     * Cost of line item per unit of measure, in major units.
+     */
+    #[Optional('unit_cost')]
+    public ?string $unitCost;
+
+    /**
+     * Code indicating unit of measure (gallons, etc.).
+     */
+    #[Optional('unit_of_measure_code')]
+    public ?string $unitOfMeasureCode;
+
+    public function __construct()
+    {
+        $this->initialize();
+    }
+
+    /**
+     * Construct an instance from the required parameters.
+     *
+     * You must use named parameters to construct any parameters with a default value.
+     */
+    public static function with(
+        ?int $discountAmount = null,
+        ?string $itemCommodityCode = null,
+        ?string $itemDescriptor = null,
+        ?string $itemQuantity = null,
+        ?string $productCode = null,
+        ?int $salesTaxAmount = null,
+        ?string $salesTaxRate = null,
+        ?int $totalAmount = null,
+        ?string $unitCost = null,
+        ?string $unitOfMeasureCode = null,
+    ): self {
+        $self = new self;
+
+        null !== $discountAmount && $self['discountAmount'] = $discountAmount;
+        null !== $itemCommodityCode && $self['itemCommodityCode'] = $itemCommodityCode;
+        null !== $itemDescriptor && $self['itemDescriptor'] = $itemDescriptor;
+        null !== $itemQuantity && $self['itemQuantity'] = $itemQuantity;
+        null !== $productCode && $self['productCode'] = $productCode;
+        null !== $salesTaxAmount && $self['salesTaxAmount'] = $salesTaxAmount;
+        null !== $salesTaxRate && $self['salesTaxRate'] = $salesTaxRate;
+        null !== $totalAmount && $self['totalAmount'] = $totalAmount;
+        null !== $unitCost && $self['unitCost'] = $unitCost;
+        null !== $unitOfMeasureCode && $self['unitOfMeasureCode'] = $unitOfMeasureCode;
+
+        return $self;
+    }
+
+    /**
+     * Discount amount for this specific line item.
+     */
+    public function withDiscountAmount(int $discountAmount): self
+    {
+        $self = clone $this;
+        $self['discountAmount'] = $discountAmount;
+
+        return $self;
+    }
+
+    /**
+     * Code used to categorize the purchase item.
+     */
+    public function withItemCommodityCode(string $itemCommodityCode): self
+    {
+        $self = clone $this;
+        $self['itemCommodityCode'] = $itemCommodityCode;
+
+        return $self;
+    }
+
+    /**
+     * Description of the purchase item.
+     */
+    public function withItemDescriptor(string $itemDescriptor): self
+    {
+        $self = clone $this;
+        $self['itemDescriptor'] = $itemDescriptor;
+
+        return $self;
+    }
+
+    /**
+     * The number of units of the product being purchased.
+     */
+    public function withItemQuantity(string $itemQuantity): self
+    {
+        $self = clone $this;
+        $self['itemQuantity'] = $itemQuantity;
+
+        return $self;
+    }
+
+    /**
+     * Code used to categorize the product being purchased.
+     */
+    public function withProductCode(string $productCode): self
+    {
+        $self = clone $this;
+        $self['productCode'] = $productCode;
+
+        return $self;
+    }
+
+    /**
+     * Sales tax amount for this line item.
+     */
+    public function withSalesTaxAmount(int $salesTaxAmount): self
+    {
+        $self = clone $this;
+        $self['salesTaxAmount'] = $salesTaxAmount;
+
+        return $self;
+    }
+
+    /**
+     * Sales tax rate for this line item.
+     */
+    public function withSalesTaxRate(string $salesTaxRate): self
+    {
+        $self = clone $this;
+        $self['salesTaxRate'] = $salesTaxRate;
+
+        return $self;
+    }
+
+    /**
+     * Total amount of all line items.
+     */
+    public function withTotalAmount(int $totalAmount): self
+    {
+        $self = clone $this;
+        $self['totalAmount'] = $totalAmount;
+
+        return $self;
+    }
+
+    /**
+     * Cost of line item per unit of measure, in major units.
+     */
+    public function withUnitCost(string $unitCost): self
+    {
+        $self = clone $this;
+        $self['unitCost'] = $unitCost;
+
+        return $self;
+    }
+
+    /**
+     * Code indicating unit of measure (gallons, etc.).
+     */
+    public function withUnitOfMeasureCode(string $unitOfMeasureCode): self
+    {
+        $self = clone $this;
+        $self['unitOfMeasureCode'] = $unitOfMeasureCode;
+
+        return $self;
+    }
+}
diff --git a/src/Version.php b/src/Version.php
index 0b584d5..e63c8d1 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -5,5 +5,5 @@
 namespace Increase;
 
 // x-release-please-start-version
-const VERSION = '0.110.0';
+const VERSION = '0.111.0';
 // x-release-please-end
diff --git a/tests/Services/Simulations/CardPurchaseSupplementsTest.php b/tests/Services/Simulations/CardPurchaseSupplementsTest.php
new file mode 100644
index 0000000..fbcf36a
--- /dev/null
+++ b/tests/Services/Simulations/CardPurchaseSupplementsTest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Tests\Services\Simulations;
+
+use Increase\CardPurchaseSupplements\CardPurchaseSupplement;
+use Increase\Client;
+use Increase\Core\Util;
+use PHPUnit\Framework\Attributes\CoversNothing;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ */
+#[CoversNothing]
+final class CardPurchaseSupplementsTest extends TestCase
+{
+    protected Client $client;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $testUrl = Util::getenv('TEST_API_BASE_URL') ?: 'http://127.0.0.1:4010';
+        $client = new Client(apiKey: 'My API Key', baseUrl: $testUrl);
+
+        $this->client = $client;
+    }
+
+    #[Test]
+    public function testCreate(): void
+    {
+        $result = $this->client->simulations->cardPurchaseSupplements->create(
+            transactionID: 'transaction_uyrp7fld2ium70oa7oi'
+        );
+
+        // @phpstan-ignore-next-line method.alreadyNarrowedType
+        $this->assertInstanceOf(CardPurchaseSupplement::class, $result);
+    }
+
+    #[Test]
+    public function testCreateWithOptionalParams(): void
+    {
+        $result = $this->client->simulations->cardPurchaseSupplements->create(
+            transactionID: 'transaction_uyrp7fld2ium70oa7oi',
+            invoice: [
+                'discountAmount' => 100,
+                'dutyTaxAmount' => 200,
+                'orderDate' => '2023-07-20',
+                'shippingAmount' => 300,
+                'shippingDestinationCountryCode' => 'US',
+                'shippingDestinationPostalCode' => '10045',
+                'shippingSourcePostalCode' => '10045',
+                'shippingTaxAmount' => 400,
+                'shippingTaxRate' => '0.2',
+                'uniqueValueAddedTaxInvoiceReference' => '12302',
+            ],
+            lineItems: [
+                [
+                    'discountAmount' => 0,
+                    'itemCommodityCode' => '001',
+                    'itemDescriptor' => 'Coffee',
+                    'itemQuantity' => '1',
+                    'productCode' => '101',
+                    'salesTaxAmount' => 0,
+                    'salesTaxRate' => '-16699',
+                    'totalAmount' => 500,
+                    'unitCost' => '5',
+                    'unitOfMeasureCode' => 'NMB',
+                ],
+            ],
+        );
+
+        // @phpstan-ignore-next-line method.alreadyNarrowedType
+        $this->assertInstanceOf(CardPurchaseSupplement::class, $result);
+    }
+}