Hunter Email Count API

openapi: 3.1.0
info:
  title: Hunter Email Count API
  description: >
    Returns the total number of email addresses Hunter has indexed for a given
    domain or company, broken down by personal/generic, department, and seniority.
    This endpoint is free and does not consume Hunter credits.
  version: v2
  contact:
    name: Hunter Support
    url: https://hunter.io/contact
servers:
  - url: https://api.hunter.io/v2
    description: Production
security: []
tags:
  - name: Email Count
    description: Count emails for a domain.
paths:
  /email-count:
    get:
      summary: Hunter Count Emails For Domain
      description: >
        Returns the total number of email addresses found by Hunter for a domain
        or a company, with breakdowns by department and seniority. No API key
        required; no credit consumed.
      operationId: emailCount
      tags:
        - Email Count
      parameters:
        - name: domain
          in: query
          description: Domain name to count emails for.
          schema: { type: string, example: stripe.com }
        - name: company
          in: query
          description: Company name (used when domain not provided).
          schema: { type: string }
        - name: type
          in: query
          description: Limit to personal or generic emails.
          schema: { type: string, enum: [personal, generic] }
      responses:
        '200':
          description: Email count.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EmailCountResponse'
        '400':
          $ref: '#/components/responses/Error'
components:
  schemas:
    EmailCountResponse:
      type: object
      properties:
        data:
          type: object
          properties:
            total: { type: integer }
            personal_emails: { type: integer }
            generic_emails: { type: integer }
            department:
              type: object
              additionalProperties:
                type: integer
            seniority:
              type: object
              additionalProperties:
                type: integer
        meta:
          type: object
          properties:
            params:
              type: object
              additionalProperties: true
    Error:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            properties:
              id: { type: string }
              code: { type: integer }
              details: { type: string }
  responses:
    Error:
      description: Error response.
      content:
        application/json:
          schema: { $ref: '#/components/schemas/Error' }