API introduction

The Watx API is a JSON REST API for developers who want to do from their own code what the dashboard does: send a WhatsApp message, create a contact, read a conversation, launch a campaign, or receive an event when a customer replies. It is scoped to one workspace. A key created in a workspace can only ever read and write that workspace’s data.

Base URL

https://api.watx.in/v1

Every path in this reference is relative to that base, so POST /messages means POST https://api.watx.in/v1/messages.

The dashboard host proxies the same API at https://app.watx.in/api/v1/…, which is the form older integrations use and the form the dashboard’s own examples show. Both reach the same service. Use https://api.watx.in/v1 for anything new.

Send your first message

Create a key in Settings → Developer → API keys with the messages:send scope (see Authentication), then:

curl -X POST https://api.watx.in/v1/messages \
  -H "Authorization: Bearer watx_live_xxxxxxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
        "to": "+919876543210",
        "type": "text",
        "text": "Your order has been packed."
      }'

{
  "data": {
    "message_id": "9d1f4b2a-6c3e-4a51-bf2d-0a7c9e114b3f",
    "whatsapp_message_id": "wamid.HBgMOTE5ODc2NTQzMjEwFQIAERgS",
    "conversation_id": "3c5b1e77-90aa-4c0e-8f71-1d2a3b4c5d6e",
    "contact_id": "7e2d9c01-55b4-4a3d-9c8e-0f1a2b3c4d5e",
    "contact_created": true
  }
}

You pass a phone number, not an internal id. Watx finds or creates the contact and the conversation, then sends. The reply appears in the shared inbox like any other message.

A free-form message only reaches a customer inside the 24-hour messaging window. Outside it, WhatsApp accepts an approved template and nothing else — send type: "template". See The 24-hour window.

What you can do

Area	Endpoints
Check a key	`GET /me`
Send messages, templates and one-time codes	`POST /messages`
Contacts	`GET`/`POST /contacts`, `GET`/`PATCH /contacts/{id}`
Segments	`GET`/`POST /segments`, `GET`/`PATCH`/`DELETE /segments/{id}`, `GET`/`POST`/`DELETE /segments/{id}/contacts`
Conversations	`GET /conversations`, `GET /conversations/{id}`, `GET /conversations/{id}/messages`
Campaigns (called broadcasts in the API)	`POST /broadcasts`, `GET /broadcasts/{id}`
Webhooks	`GET`/`POST /webhooks`, `GET`/`PATCH`/`DELETE /webhooks/{id}`

What the API does not cover: managing templates, automations, flows, forms, deals, sales documents and AI agents are dashboard features with no public endpoints. Sending happens on WhatsApp — Instagram and website conversations can be read through the API, but not replied to.

On Channels → WhatsApp → Templates, the code button on a template’s row shows the exact POST /messages request that sends that template, with its own sample values filled in, as curl or as a JSON body.

The feature called Campaigns in the app was called Broadcasts until September 2026. The API kept the old name: the endpoints are /broadcasts and the scope is broadcasts:send.

Versioning

The version is in the path. v1 is the only version, and it is stable: the endpoints, the response envelope and the field names above are what you can build on. Changes are additive. New fields appear on existing responses and new endpoints appear under /v1 without a version bump, so parse leniently and ignore fields you do not recognise. Renamed things keep their old name working alongside the new one — message_id was added beside whatsapp_message_id, and API keys issued under the old converse360_live_ prefix still authenticate.

Authentication

Create a key, pick its scopes, send the header.

Requests and responses

The envelope, error codes, pagination, rate limits.

Webhooks

Events, signatures, retries.

Overview

Account

Messages

Contacts

Segments

Conversations

Broadcasts

Webhooks

API introduction

Base URL

Send your first message

What you can do

Versioning

Next

Authentication

Requests and responses

Webhooks

​Base URL

​Send your first message

​What you can do

​Versioning

​Next

Authentication

Requests and responses

Webhooks

Base URL

Send your first message

What you can do

Versioning

Next