---
title: "Start WhatsApp Challenge"
method: POST
path: "/challenge/whatsapp"
tags: ["WhatsApp"]
---

# Start WhatsApp Challenge

`POST /challenge/whatsapp`

Start a challenge by sending a WhatsApp message containing an OTP code.

## Response `200`

OK

- object
  - `challengeId` string

## Other responses

- `400` — Invalid Request
- `401` — Unauthorized
- `404` — Not Found
- `429` — Too Many Requests

---

[API](https://skmtc.dev/authsignal/apis/call-connect-api.md) · [All operations](https://skmtc.dev/authsignal/apis/call-connect-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/authsignal/call-connect-api/revisions/5604d744e3ad/schema)