diff --git a/app/api/v2/account/withdraws.rb b/app/api/v2/account/withdraws.rb
index eae682285b..ac34044cca 100644
--- a/app/api/v2/account/withdraws.rb
+++ b/app/api/v2/account/withdraws.rb
@@ -47,7 +47,7 @@ class Withdraws < Grape::API
                    desc: 'Wallet address on the Blockchain.'
           requires :currency,
                    type: String,
-                   values: { value: -> { Currency.coins.codes(bothcase: true) }, message: 'account.withdraw.currency_doesnt_exist'},
+                   values: { value: -> { Currency.coins.codes(bothcase: true) }, message: 'account.currency.doesnt_exist'},
                    desc: 'The currency code.'
           requires :amount,
                    type: { value: BigDecimal, message: 'account.withdraw.non_decimal_amount' },
diff --git a/app/api/v2/helpers.rb b/app/api/v2/helpers.rb
index 71af0267fd..5c5bd26f86 100644
--- a/app/api/v2/helpers.rb
+++ b/app/api/v2/helpers.rb
@@ -30,7 +30,7 @@ def trading_must_be_permitted!
 
       def withdraw_api_must_be_enabled!
         if ENV.false?('ENABLE_ACCOUNT_WITHDRAWAL_API')
-          error!({ errors: ['withdraw.status.disabled'] }, 422)
+          error!({ errors: ['account.withdraw.disabled_api'] }, 422)
         end
       end
 
diff --git a/app/api/v2/market/named_params.rb b/app/api/v2/market/named_params.rb
index 8130c0823f..3056bca647 100644
--- a/app/api/v2/market/named_params.rb
+++ b/app/api/v2/market/named_params.rb
@@ -7,13 +7,6 @@ module Market
       module NamedParams
         extend ::Grape::API::Helpers
 
-        params :currency do
-          requires :currency,
-                  type: String,
-                  values: { value: -> { Currency.enabled.pluck(:id) }, message: 'account.currency.doesnt_exist' },
-                  desc: 'The currency code.'
-        end
-
         params :market do
           requires :market,
                   type: String,
diff --git a/docs/api/errors.md b/docs/api/errors.md
new file mode 100644
index 0000000000..cca6953549
--- /dev/null
+++ b/docs/api/errors.md
@@ -0,0 +1,95 @@
+# Peatio Member API Errors
+
+## Shared errors
+
+| Code                    | Description                         |
+| ----------------------- | ----------------------------------- |
+| `jwt.decode_and_verify` | Impossible to decode and verify JWT |
+| `record.not_found`      | Record Not found                    |
+| `server.internal_error` | Internal Server Error               |
+
+## Account module
+
+| Code                                    | Description                                    |
+| --------------------------------------- | ---------------------------------------------- |
+| `account.currency.doesnt_exist`         | **Currency** doesn't exist in database         |
+| `account.deposit.invalid_state`         | Deposit **state** is not valid                 |
+| `account.deposit.non_integer_limit`     | Parameter **limit** should be integer          |
+| `account.deposit.invalid_limit`         | Parameter **limit** is not valid               |
+| `account.deposit.non_positive_page`     | Parameter **page** should be positive number   |
+| `account.deposit.empty_txid`            | Parameter **txid** is missing or empty         |
+| `account.deposit.not_permitted`         | Pass the corresponding verification steps to **deposit funds** |
+| `account.withdraw.non_integer_limit`    | Parameter **limit** should be integer          |
+| `account.withdraw.invalid_limit`        | Parameter **limit** is not valid               |
+| `account.withdraw.non_positive_page`    | Parameter **page** should be positive number   |
+| `account.withdraw.non_integer_otp`      | Parameter **otp** should be integer            |
+| `account.withdraw.empty_otp`            | Parameter **otp** is missing or empty          |
+| `account.withdraw.empty_rid`            | Parameter **rid** is missing or empty          |
+| `account.withdraw.non_decimal_amount`   | Parameter **amount** should be decimal         |
+| `account.withdraw.non_positive_amount`  | Parameter **amount** should be positive number |
+| `account.withdraw.insufficient_balance` | Account **balance** is insufficient            |
+| `account.withdraw.invalid_amount`       | Parameter **amount** is not valid              |
+| `account.withdraw.create_error`         | Failed to create withdraw                      |
+| `account.withdraw.invalid_otp`          | Parameter **otp** is not valid                 |
+| `account.withdraw.disabled_api`         | Withdrawal API is disabled                     |
+| `account.withdraw.not_permitted`        | Pass the corresponding verification steps to **withdraw funds** |
+| `account.deposit_address.invalid_address_format`             | Invalid parameter for deposit address format |
+| `account.deposit_address.doesnt_support_cash_address_format` | Currency doesn't support cash address format |
+
+## Market module
+
+| Code                                         | Description                                                     |
+| -------------------------------------------- | ----------------------------------------------------------------|
+| `market.account.insufficient_balance`        | Account balance is insufficient                                 |
+| `market.market.doesnt_exist`                 | **Market** doesn't exist in database                            |
+| `market.order.insufficient_market_liquidity` | Insufficient market liquidity                                   |
+| `market.order.invalid_volume_or_price`       | Order **volume** or **price** is invalid for selected market    |
+| `market.order.create_error`                  | Failed to create order                                          |
+| `market.order.cancel_error`                  | Failed to cancel order                                          |
+| `market.order.market_order_price`            | Market order doesn't have **price**                             |
+| `market.order.invalid_state`                 | Parameter **state** is not valid                                |
+| `market.order.invalid_limit`                 | Parameter **limit** is not valid                                |
+| `market.order.non_integer_limit`             | Parameter **limit** should be integer                           |
+| `market.order.invalid_order_by`              | Parameter **order_by** is not valid                             |
+| `market.order.invalid_side`                  | Parameter **side** is not valid                                 |
+| `market.order.non_decimal_volume`            | Parameter **volume** should be decimal                          |
+| `market.order.non_positive_volume`           | Parameter **volume** should be positive number                  |
+| `market.order.invalid_type`                  | Parameter **type** is not valid                                 |
+| `market.order.non_decimal_price`             | Parameter **price** should be decimal                           |
+| `market.order.non_positive_price`            | Parameter **price** should be positive number                   |
+| `market.order.non_integer_id`                | Parameter **id** should be integer                              |
+| `market.order.empty_id`                      | Parameter **id** is missing or empty                            |
+| `market.trade.non_integer_limit`             | Parameter **limit** should be integer                           |
+| `market.trade.invalid_limit`                 | Parameter **limit** is not valid                                |
+| `market.trade.empty_page`                    | Parameter **page** is missing or empty                          |
+| `market.trade.non_integer_timestamp`         | Parameter **timestamp** should be integer                       |
+| `market.trade.empty_timestamp`               | Parameter **timestamp** is missing or empty                     |
+| `market.trade.invalid_order_by`              | Parameter **order_by** is not valid                             |
+| `market.trade.not_permitted`                 | Pass the corresponding verification steps to **enable trading** |
+
+## Public module
+
+| Code                                      | Description                                  |
+| ----------------------------------------- | ---------------------------------------------|
+| `public.currency.doesnt_exist`            | **Currency** doesn't exist in database       |
+| `public.currency.invalid_type`            | **Currency** type is not valid               |
+| `public.market.doesnt_exist`              | **Market** doesn't exist in database         |
+| `public.order_book.non_integer_ask_limit` | Parameter **ask_limit** should be integer    |
+| `public.order_book.invalid_ask_limit`     | Parameter **ask_limit** is not valid         |
+| `public.order_book.non_integer_bid_limit` | Parameter **bid_limit** should be integer    |
+| `public.order_book.invalid_bid_limit`     | Parameter **bid_limit** is not valid         |
+| `public.trade.invalid_limit`              | Parameter **limit** is not valid             |
+| `public.trade.non_integer_limit`          | Parameter **limit** should be integer        |
+| `public.trade.non_positive_page`          | Parameter **page** should be positive number |
+| `public.trade.non_integer_timestamp`      | Parameter **timestamp** should be integer    |
+| `public.trade.invalid_order_by`           | Parameter **order_by** is not valid          |
+| `public.market_depth.non_integer_limit`   | Parameter **limit** should be integer        |
+| `public.market_depth.invalid_limit`       | Parameter **limit** is not valid             |
+| `public.k_line.non_integer_period`        | Parameter **period** should be integer       |
+| `public.k_line.invalid_period`            | Parameter **period** is not valid            |
+| `public.k_line.non_integer_time_from`     | Parameter **time_from** should be integer    |
+| `public.k_line.empty_time_from`           | Parameter **time_from** is missing or empty  |
+| `public.k_line.non_integer_time_to`       | Parameter **time_to** should be integer      |
+| `public.k_line.empty_time_to`             | Parameter **time_to** is missing or empty    |
+| `public.k_line.non_integer_limit`         | Parameter **limit** should be integer        |
+| `public.k_line.invalid_limit`             | Parameter **limit** is not valid             |
diff --git a/spec/api/v2/account/withdraws_spec.rb b/spec/api/v2/account/withdraws_spec.rb
index 206b29d76b..ce009619e7 100644
--- a/spec/api/v2/account/withdraws_spec.rb
+++ b/spec/api/v2/account/withdraws_spec.rb
@@ -109,7 +109,7 @@
       it 'doesn\'t allow fiat' do
         api_post '/api/v2/account/withdraws', params: data, token: token
         expect(response).to have_http_status(422)
-        expect(response).to include_api_error('account.withdraw.currency_doesnt_exist')
+        expect(response).to include_api_error('account.currency.doesnt_exist')
       end
     end
 
@@ -120,7 +120,7 @@
         it 'doesn\'t allow account withdrawal API call' do
           api_post '/api/v2/account/withdraws', params: data, token: token
           expect(response).to have_http_status(422)
-          expect(JSON.parse(response.body)).to eq('errors' => ["withdraw.status.disabled"])
+          expect(response).to include_api_error('account.withdraw.disabled_api')
         end
       end
 
@@ -196,7 +196,7 @@
         data[:currency] = nil
         api_post '/api/v2/account/withdraws', params: data, token: token
         expect(response).to have_http_status(422)
-        expect(response).to include_api_error('account.withdraw.currency_doesnt_exist')
+        expect(response).to include_api_error('account.currency.doesnt_exist')
       end
 
       it 'creates new withdraw and immediately submits it' do