---
title: "Phone number"
method: GET
path: "/channel/check-phone-number"
---

# Phone number

`GET /channel/check-phone-number`

The Check WhatsApp Number API endpoint allows you to verify if a phone number is registered on WhatsApp. This endpoint is essential for ensuring that your messages are sent to valid WhatsApp users, improving your communication efficiency.

## Query parameters

- `phone` string, required

## Response `200`

200

- object
  - `success` boolean
  - `message` string
  - `data` object
    - `is_exists` boolean
    - `contact_id` unknown

## Other responses

- `403` — 403
- `422` — 422

---

[API](https://skmtc.net/crunchz/apis/live-2.md) · [All operations](https://skmtc.net/crunchz/apis/live-2/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/crunchz/live-2/versions/14e6b45e8808/schema)