NOWPayments Authentication API

openapi: 3.0.3
info:
  title: NOWPayments Authentication API
  description: 'NOWPayments is a crypto payment gateway that enables businesses to accept 300+ cryptocurrencies, create payment invoices, process recurring subscriptions, and manage merchant mass payouts. The API supports automatic coin conversion, IPN webhooks, and fiat withdrawals.

    '
  version: 1.0.0
  contact:
    name: NOWPayments Support
    email: support@nowpayments.io
    url: https://nowpayments.io/help
  termsOfService: https://nowpayments.io/terms
servers:
- url: https://api.nowpayments.io/v1
  description: Production server
- url: https://api.sandbox.nowpayments.io/v1
  description: Sandbox server
security:
- ApiKeyAuth: []
tags:
- name: Authentication
  description: JWT authentication for mass payouts
paths:
  /auth:
    post:
      operationId: authenticate
      summary: Authenticate for mass payouts
      description: 'Authenticates a merchant using email and password to obtain a JWT token. This token is required for mass payout operations.

        '
      tags:
      - Authentication
      security: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AuthRequest'
      responses:
        '200':
          description: Authentication successful
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AuthResponse'
              example:
                token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    AuthResponse:
      type: object
      properties:
        token:
          type: string
          description: JWT token for authenticated mass payout operations
    AuthRequest:
      type: object
      required:
      - email
      - password
      properties:
        email:
          type: string
          format: email
          description: Merchant account email
          example: merchant@example.com
        password:
          type: string
          format: password
          description: Merchant account password
    ErrorResponse:
      type: object
      properties:
        message:
          type: string
          description: Error message
        errors:
          type: array
          description: Detailed error list
          items:
            type: string
  responses:
    Unauthorized:
      description: Missing or invalid API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: NOWPayments API key obtained from your merchant dashboard
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT token obtained from the /auth endpoint (required for mass payout operations)
externalDocs:
  description: NOWPayments API Documentation
  url: https://nowpayments.io/help/api