openapi: 3.0.3
info:
  title: Snov.io Authentication API
  description: Snov.io is a sales automation and lead generation platform. The REST API enables programmatic access to email finding, domain search, email verification, drip campaign management, email warm-up, prospect management, CRM pipeline, and webhook subscriptions. Authentication uses OAuth 2.0 client credentials to obtain short-lived Bearer tokens. All API operations consume credits from the account balance.
  version: '2.0'
  contact:
    name: Snov.io Support
    url: https://snov.io/knowledgebase/
  termsOfService: https://snov.io/terms-of-service/
  license:
    name: Proprietary
    url: https://snov.io/terms-of-service/
servers:
- url: https://api.snov.io
  description: Snov.io API server
tags:
- name: Authentication
  description: OAuth 2.0 token management
paths:
  /v1/oauth/access_token:
    post:
      tags:
      - Authentication
      summary: Get access token
      description: Obtain a short-lived Bearer token using OAuth 2.0 client credentials flow. Tokens expire after 3600 seconds.
      operationId: getAccessToken
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - grant_type
              - client_id
              - client_secret
              properties:
                grant_type:
                  type: string
                  enum:
                  - client_credentials
                  example: client_credentials
                client_id:
                  type: string
                  description: Client ID from account settings
                client_secret:
                  type: string
                  description: Client secret from account settings
      responses:
        '200':
          description: Access token issued
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccessToken'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    BadRequest:
      description: Bad request — missing or invalid parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Unauthorized — missing or invalid Bearer token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    AccessToken:
      type: object
      properties:
        access_token:
          type: string
          description: Bearer token for API authentication
        token_type:
          type: string
          example: Bearer
        expires_in:
          type: integer
          description: Token lifetime in seconds
          example: 3600
    Error:
      type: object
      properties:
        error:
          type: string
          description: Error code
        message:
          type: string
          description: Human-readable error message
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Obtain a Bearer token via POST /v1/oauth/access_token using client credentials. Tokens expire after 3600 seconds.