Cryptomus Exchange API

openapi: 3.1.0
info:
  title: Cryptomus Exchange API
  description: 'Cryptomus is a cryptocurrency payment gateway providing REST APIs for accepting crypto payments, creating invoices, processing payouts, managing recurring billing, and accessing real-time exchange rate and market data across 100+ cryptocurrencies.

    '
  version: 1.0.0
  contact:
    name: Cryptomus Support
    url: https://cryptomus.com/
  termsOfService: https://cryptomus.com/terms
  license:
    name: Proprietary
    url: https://cryptomus.com/privacy
servers:
- url: https://api.cryptomus.com/v1
  description: Cryptomus API v1 (Merchant & Payout)
- url: https://api.cryptomus.com/v2
  description: Cryptomus API v2 (Exchange & Market Data)
security:
- MerchantAuth: []
tags:
- name: Exchange
  description: Access exchange rates, trading pairs, and market data
paths:
  /user-api/exchange/markets:
    get:
      operationId: listTradingPairs
      summary: List available trading pairs
      description: Retrieve all available cryptocurrency trading pairs for exchange.
      tags:
      - Exchange
      servers:
      - url: https://api.cryptomus.com/v2
      responses:
        '200':
          description: Trading pairs list
          content:
            application/json:
              schema:
                type: object
                properties:
                  result:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                          description: Unique trading pair identifier
                        symbol:
                          type: string
                          description: Trading pair symbol in BASE_QUOTE format
                        baseCurrency:
                          type: string
                        quoteCurrency:
                          type: string
                        baseMinSize:
                          type: string
                        quoteMinSize:
                          type: string
                        baseMaxSize:
                          type: string
                        quoteMaxSize:
                          type: string
                        basePrec:
                          type: string
                        quotePrec:
                          type: string
        '404':
          description: Not found
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /user-api/exchange/markets/price:
    get:
      operationId: getMarketPrice
      summary: Get current market price
      description: Retrieve the current market price for a specific trading pair.
      tags:
      - Exchange
      servers:
      - url: https://api.cryptomus.com/v2
      parameters:
      - in: query
        name: symbol
        required: true
        schema:
          type: string
        description: Trading pair symbol (e.g., TRX_USDT)
      responses:
        '200':
          description: Current market price
          content:
            application/json:
              schema:
                type: object
                properties:
                  price:
                    type: string
                    description: Current asset price
        '404':
          description: Not found
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /user-api/exchange/orders/market:
    post:
      operationId: createMarketOrder
      summary: Create a market order
      description: Execute a market buy or sell order for a cryptocurrency trading pair.
      tags:
      - Exchange
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      servers:
      - url: https://api.cryptomus.com/v2
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - market
              - quantity
              - direction
              - value
              properties:
                market:
                  type: string
                  description: Trading pair (e.g., TRX_USDT)
                quantity:
                  type: string
                  description: Amount in base currency
                direction:
                  type: string
                  enum:
                  - buy
                  - sell
                  description: Order direction
                value:
                  type: string
                  description: Limit price in quote currency
                client_order_id:
                  type: string
                  description: Client-generated unique identifier
                tag:
                  type: string
                  description: Broker tag
      responses:
        '200':
          description: Order created
          content:
            application/json:
              schema:
                type: object
                properties:
                  order_id:
                    type: string
                    description: Successfully created order identifier
                  state:
                    type: integer
                    description: Error code (0 = success)
                  message:
                    type: string
        '404':
          description: Not found
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        state:
          type: integer
          description: Error state code (1 = error)
        message:
          type: string
        errors:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
  securitySchemes:
    MerchantAuth:
      type: apiKey
      in: header
      name: merchant
      description: 'Merchant UUID from personal account settings. All requests also require a `sign` header computed as MD5(base64_encode(request_body) + API_KEY).

        '