openapi: 3.1.0
info:
  title: Cryptomus Exchange Payments 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: Payments
  description: Create and manage payment invoices for merchant integrations
paths:
  /payment:
    post:
      operationId: createInvoice
      summary: Create a payment invoice
      description: Creates a cryptocurrency payment invoice for merchant integrations.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
        description: MD5(base64_encode(body) + API_KEY)
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - amount
              - currency
              - order_id
              properties:
                amount:
                  type: string
                  description: Payment amount (e.g., "10.28")
                currency:
                  type: string
                  description: Currency code
                order_id:
                  type: string
                  minLength: 1
                  maxLength: 128
                  description: Unique merchant order ID (alphanumeric, dashes, underscores)
                network:
                  type: string
                  description: Blockchain network code
                url_return:
                  type: string
                  minLength: 6
                  maxLength: 255
                  description: Return URL after payment
                url_success:
                  type: string
                  minLength: 6
                  maxLength: 255
                  description: Success redirect URL
                url_callback:
                  type: string
                  minLength: 6
                  maxLength: 255
                  description: Webhook URL for payment status notifications
                is_payment_multiple:
                  type: boolean
                  default: true
                  description: Allow multiple payments for the same invoice
                lifetime:
                  type: integer
                  minimum: 300
                  maximum: 43200
                  default: 3600
                  description: Invoice lifespan in seconds
                to_currency:
                  type: string
                  description: Target cryptocurrency for conversion
                subtract:
                  type: integer
                  minimum: 0
                  maximum: 100
                  default: 0
                  description: Commission percentage deducted from payment amount
                accuracy_payment_percent:
                  type: number
                  minimum: 0
                  maximum: 5
                  default: 0
                  description: Accepted payment tolerance percentage
                additional_data:
                  type: string
                  maxLength: 255
                  description: Internal notes
                currencies:
                  type: array
                  items:
                    type: string
                  description: Allowed payment currencies
                except_currencies:
                  type: array
                  items:
                    type: string
                  description: Excluded payment currencies
                course_source:
                  type: string
                  enum:
                  - Binance
                  - BinanceP2P
                  - Exmo
                  - Kucoin
                  description: Exchange rate source
                from_referral_code:
                  type: string
                  description: Referral connection code
                discount_percent:
                  type: integer
                  minimum: -99
                  maximum: 100
                  description: Discount (-) or commission (+) percentage applied
                is_refresh:
                  type: boolean
                  default: false
                  description: Refresh an expired invoice
      responses:
        '200':
          description: Invoice created successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    $ref: '#/components/schemas/PaymentObject'
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /payment/info:
    post:
      operationId: getPaymentInfo
      summary: Get payment information
      description: Retrieve details of a specific payment invoice.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                uuid:
                  type: string
                  format: uuid
                  description: Invoice UUID
                order_id:
                  type: string
                  minLength: 1
                  maxLength: 128
                  description: Invoice order ID (takes precedence if both provided)
      responses:
        '200':
          description: Payment information retrieved
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    $ref: '#/components/schemas/PaymentObject'
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /payment/list:
    post:
      operationId: listPayments
      summary: List payment history
      description: Retrieve a paginated list of payment invoices with optional date filters.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                date_from:
                  type: string
                  description: Filter from date (YYYY-MM-DD H:mm:ss)
                date_to:
                  type: string
                  description: Filter to date (YYYY-MM-DD H:mm:ss)
                cursor:
                  type: string
                  description: Pagination cursor
      responses:
        '200':
          description: Payment list retrieved
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    type: object
                    properties:
                      items:
                        type: array
                        items:
                          $ref: '#/components/schemas/PaymentObject'
                      paginate:
                        $ref: '#/components/schemas/PaginateResult'
  /payment/services:
    post:
      operationId: listPaymentServices
      summary: List available payment services
      description: Retrieve available payment networks and currencies with limits and commissions.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Payment services list
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    type: array
                    items:
                      $ref: '#/components/schemas/ServiceItem'
  /payment/refund:
    post:
      operationId: refundPayment
      summary: Refund a payment
      description: Issue a refund for a completed payment to a specified address.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - address
              - is_subtract
              properties:
                uuid:
                  type: string
                  format: uuid
                  description: Invoice UUID
                order_id:
                  type: string
                  minLength: 1
                  maxLength: 128
                  description: Invoice order ID
                address:
                  type: string
                  description: Wallet address to refund to
                is_subtract:
                  type: boolean
                  description: If true, deduct commission from merchant balance; if false, reduce refund amount
      responses:
        '200':
          description: Refund initiated
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    type: array
        '422':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /payment/mark-as-paid:
    post:
      operationId: markPaymentAsPaid
      summary: Mark payment as paid
      description: Manually mark an invoice as paid (test/internal use).
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                uuid:
                  type: string
                  format: uuid
                order_id:
                  type: string
      responses:
        '200':
          description: Payment marked as paid
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  message:
                    type: string
  /payment/qr:
    post:
      operationId: getInvoiceQrCode
      summary: Generate invoice QR code
      description: Generate a QR code image for a payment invoice.
      tags:
      - Payments
      parameters:
      - in: header
        name: sign
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - merchant_payment_uuid
              properties:
                merchant_payment_uuid:
                  type: string
                  format: uuid
                  description: Invoice identifier
      responses:
        '200':
          description: QR code image returned
          content:
            application/json:
              schema:
                type: object
                properties:
                  state:
                    type: integer
                  result:
                    type: object
                    properties:
                      image:
                        type: string
                        description: Base64 encoded QR code image
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
    PaginateResult:
      type: object
      properties:
        count:
          type: integer
          description: Number of items on the current page
        hasPages:
          type: boolean
          description: Whether multiple pages exist
        nextCursor:
          type: string
          nullable: true
          description: Cursor for the next page
        previousCursor:
          type: string
          nullable: true
          description: Cursor for the previous page
        perPage:
          type: integer
          description: Maximum items per page
    PaymentObject:
      type: object
      properties:
        uuid:
          type: string
          format: uuid
        order_id:
          type: string
        amount:
          type: string
        payment_amount:
          type: string
          nullable: true
        payer_amount:
          type: string
          nullable: true
        discount_percent:
          type: integer
          nullable: true
        discount:
          type: string
        payer_currency:
          type: string
          nullable: true
        currency:
          type: string
        merchant_amount:
          type: string
          nullable: true
        network:
          type: string
          nullable: true
        address:
          type: string
          nullable: true
        from:
          type: string
          nullable: true
        txid:
          type: string
          nullable: true
        payment_status:
          type: string
          enum:
          - process
          - check
          - paid
          - paid_over
          - fail
          - wrong_amount
          - cancel
          - system_fail
          - refund_process
          - refund_fail
          - refund_paid
        url:
          type: string
          format: uri
        expired_at:
          type: integer
          description: Unix timestamp of expiry
        is_final:
          type: boolean
        additional_data:
          type: string
          nullable: true
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
    ServiceItem:
      type: object
      properties:
        network:
          type: string
        currency:
          type: string
        is_available:
          type: boolean
        limit:
          type: object
          properties:
            min_amount:
              type: string
            max_amount:
              type: string
        commission:
          type: object
          properties:
            fee_amount:
              type: string
            percent:
              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).

        '