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

# Add Emails

> Add emails to an existing catchall list



## OpenAPI

````yaml api-reference/openapi.yaml post /catchall/{listId}/add
openapi: 3.0.3
info:
  title: OmniVerifier Public API
  description: Public API for email verification and credit management
  version: 1.0.0
  contact:
    name: OmniVerifier Support
    email: support@omniverifier.com
servers:
  - url: https://api.omniverifier.com/v1/validate
    description: API Server
security:
  - ApiKeyAuth: []
paths:
  /catchall/{listId}/add:
    post:
      tags:
        - Catchall Detection
      summary: Add emails to catchall list
      description: Add emails to an existing catchall list
      operationId: addToCatchallList
      parameters:
        - name: listId
          in: path
          required: true
          schema:
            type: string
          description: List ID
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - emails
              properties:
                emails:
                  type: array
                  items:
                    type: string
                    format: email
                  description: Array of email addresses to add
                  minItems: 1
                  maxItems: 10000
                  example:
                    - user@example.com
                    - test@domain.com
      responses:
        '200':
          description: Successfully added emails to list
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: integer
                    description: List ID
                    example: 12346
                  count:
                    type: integer
                    description: Number of emails added
                    example: 100
        '400':
          description: Bad request - validation error or insufficient credits
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: List not found
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
          description: Error message
          example: Invalid API key
        code:
          type: string
          description: Error code
          example: INVALID_API_KEY
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API key for authentication

````