openapi: 3.0.3
info:
  title: Snov.io Authentication Email Verifier API
  description: 'Snov.io sales engagement REST API. Authentication uses the OAuth2 client_credentials grant to exchange an API User ID (client_id) and API Secret (client_secret) for a one-hour Bearer access token. Email finder, domain search, and email verification use an asynchronous pattern: a POST to a `/start` endpoint returns a `task_hash`, then a GET to the matching `/result` endpoint retrieves the outcome. Most request bodies are application/x-www-form-urlencoded; a few v2 endpoints accept JSON. The API is rate limited to 60 requests per minute.'
  termsOfService: https://snov.io/terms-and-conditions
  contact:
    name: Snov.io Support
    url: https://snov.io/api
  version: '1.0'
servers:
- url: https://api.snov.io
  description: Snov.io production API
security:
- OAuth2: []
tags:
- name: Email Verifier
paths:
  /v2/email-verification/start:
    post:
      operationId: startEmailVerification
      tags:
      - Email Verifier
      summary: Start email verification
      description: Starts verification for up to ten email addresses at once. Each email is added as a separate parameter. Supports an optional webhook_url for async delivery of results.
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - emails
              properties:
                emails:
                  type: array
                  maxItems: 10
                  items:
                    type: string
                    format: email
                webhook_url:
                  type: string
                  format: uri
      responses:
        '200':
          description: Verification task started.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TaskStarted'
  /v2/email-verification/result:
    get:
      operationId: getEmailVerificationResult
      tags:
      - Email Verifier
      summary: Get email verification result
      parameters:
      - $ref: '#/components/parameters/TaskHashQuery'
      responses:
        '200':
          description: Verification results with SMTP and quality signals.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EmailVerificationResult'
components:
  schemas:
    EmailVerificationResult:
      type: object
      properties:
        success:
          type: boolean
        data:
          type: array
          items:
            type: object
            properties:
              email:
                type: string
                format: email
              smtp_status:
                type: string
                enum:
                - valid
                - not_valid
                - unknown
              is_valid_format:
                type: boolean
              is_disposable:
                type: boolean
              is_webmail:
                type: boolean
              is_gibberish:
                type: boolean
    TaskStarted:
      type: object
      properties:
        success:
          type: boolean
        task_hash:
          type: string
        status:
          type: string
          example: in_progress
  parameters:
    TaskHashQuery:
      name: task_hash
      in: query
      required: true
      description: The task hash returned by the matching /start endpoint.
      schema:
        type: string
  securitySchemes:
    OAuth2:
      type: oauth2
      description: OAuth2 client_credentials flow. POST client_id and client_secret to /v1/oauth/access_token to obtain a Bearer token, then send it in the Authorization header.
      flows:
        clientCredentials:
          tokenUrl: https://api.snov.io/v1/oauth/access_token
          scopes: {}