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

# Check Number

> Perform an instant validation check on a destination phone number to determine if it is actively registered on the WhatsApp network before executing your messaging payloads.



## OpenAPI

````yaml GET /check-number
openapi: 3.0.3
info:
  title: Wachat Enterprise API
  description: >
    Welcome to the official Wachat API reference. Wachat provides
    developer-friendly, ultra-reliable infrastructure to scale your WhatsApp
    communications programmatically.


    Easily deploy automated messaging pipelines, orchestrate interactive
    customer engagement patterns, verify phone numbers instantly, and control
    containerized WhatsApp instances via a secure, production-grade REST
    architecture.
  version: 1.0.0
servers:
  - url: https://app.wachat.net/api/v1
    description: Live Production Gateway
security:
  - bearerAuth: []
paths:
  /check-number:
    get:
      tags:
        - Network Validation
      summary: Verify WhatsApp Contact Registration
      description: >-
        Perform an instant validation check on a destination phone number to
        determine if it is actively registered on the WhatsApp network before
        executing your messaging payloads.
      parameters:
        - in: query
          name: instanceName
          required: true
          schema:
            type: string
          description: >-
            The unique identifier string assigned to your active session
            instance.
        - in: query
          name: number
          required: true
          schema:
            type: string
          description: >-
            The recipient's phone number formatted with the international
            country code (e.g., 628123456789).
      responses:
        '200':
          description: Verification lookup completed successfully.
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    example: success
                  data:
                    type: object
                    properties:
                      exists:
                        type: boolean
                        description: >-
                          Indication of whether the target is registered on
                          WhatsApp.
                      jid:
                        type: string
                        description: >-
                          The unique WhatsApp Jabber ID (JID) assigned to the
                          contact.
                      number:
                        type: string
                        description: The verified canonical phone number.
                      instance:
                        type: string
                        description: The session instance handling this lookup.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Authenticate your integration payloads by injecting your premium secure
        Wachat Account API Private Secret Key inside standard Authorization
        Bearer header vectors.

````