---
title: "Check if numbers exist on WhatsApp"
method: POST
path: "/v1/chat/whatsappNumbers/{instance}"
tags: ["Chat"]
---

# Check if numbers exist on WhatsApp

`POST /v1/chat/whatsappNumbers/{instance}`

## Request

- Base URL: `http://localhost:8080`
- URL: `http://localhost:8080/v1/chat/whatsappNumbers/{instance}`
- Auth: API key in header `apikey`

Checks whether the given phone numbers are registered on WhatsApp

## Path parameters

- `instance` string, required

## Request body

- DtoNumberExistsRequest
  - `numbers` string[], required

## Response `200`

List of number existence results

- object[]

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `422`: Unprocessable Entity
- `500`: Internal Server Error

## Changes

- **2026-07-18** `f812473c5a89`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/verbeux-ai/apis/whatsmiau-api/changes/v1/chat/whatsappNumbers/:instance/post.md)

---

[API](https://skmtc.dev/verbeux-ai/apis/whatsmiau-api.md) - [All operations](https://skmtc.dev/verbeux-ai/apis/whatsmiau-api/llms.txt) - [OpenAPI document](https://skmtc.dev/verbeux-ai/apis/whatsmiau-api/revisions/b425ec589eb0?raw)