> ## Documentation Index
> Fetch the complete documentation index at: https://docs.emailr.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Check which emails exist

> Given an array of email addresses, returns which ones exist in your contact list and which are missing.



## OpenAPI

````yaml /openapi.json post /v1/contacts/check-emails
openapi: 3.0.3
info:
  title: Emailr API
  version: 1.0.0
servers:
  - url: https://api.emailr.dev
    description: Production
security: []
tags:
  - name: emails
    description: Email sending and management
  - name: contacts
    description: Contact management
  - name: templates
    description: Email template management
  - name: domains
    description: Domain verification and management
  - name: webhooks
    description: Webhook configuration
  - name: broadcasts
    description: Broadcast campaign management
  - name: segments
    description: Contact segmentation
paths:
  /v1/contacts/check-emails:
    post:
      tags:
        - contacts
      summary: Check which emails exist
      description: >-
        Given an array of email addresses, returns which ones exist in your
        contact list and which are missing.
      operationId: checkEmails
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CheckEmailsRequest'
      responses:
        '200':
          description: Email existence check results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CheckEmailsResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearerAuth: []
components:
  schemas:
    CheckEmailsRequest:
      type: object
      properties:
        emails:
          type: array
          items:
            type: string
            format: email
          minItems: 1
          maxItems: 10000
          description: Array of email addresses to check existence for
          example:
            - user1@example.com
            - user2@example.com
      required:
        - emails
    CheckEmailsResponse:
      type: object
      properties:
        existing:
          type: array
          items:
            type: string
            format: email
          description: Emails that exist in the contact list
        missing:
          type: array
          items:
            type: string
            format: email
          description: Emails that do not exist in the contact list
      required:
        - existing
        - missing
    Error:
      type: object
      properties:
        error:
          type: string
          example: An error occurred
        code:
          type: string
          example: VALIDATION_ERROR
        details: {}
      required:
        - error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: API key authentication. Use your API key as the bearer token.

````