Service type: ws

WhatsApp Verification

Confirm whether a phone number is registered on WhatsApp.

Usage cost1 credit per check

Response modeSynchronous

API endpointPOST /api/v1/check

What it checks

What does WhatsApp Verification return?

The fastest and most economical option for cleaning contact lists before messaging, routing leads, or starting an outreach workflow.

Best for

Use this product when you need

Contact list cleaning
Lead qualification
Pre-send validation
CRM data quality

API contract

One request, immediate result

Read full API docs

Send one E.164 phone number and select this product with service_type. Authentication uses your API key.

RequestPOST /api/v1/check

{
  "service_type": "ws",
  "identifier": "+14155552671"
}

Response200 OK

{
  "code": 0,
  "msg": "ok",
  "data": {
    "id": 123,
    "identifier": "+14155552671",
    "registered": true,
    "transaction_id": "chk_example123",
    "status": "success",
    "service_type": "ws",
    "charged_credits": 1
  }
}

Result fields

Fields added by this product

registeredboolean

Whether the number is registered on WhatsApp.

Product FAQ

Questions about Registration Check

What does WhatsApp Verification check?

It checks one phone number and returns registration status in the same synchronous response.

How much does Registration Check cost?

Each completed check uses 1 credit. Failed or undetermined upstream requests do not keep the charge.

What phone number format is required?

Use E.164 format with the country code, for example +14155552671.

Does the response expose cache status?

No. Cache handling is internal and clients must not depend on a cached field.