WhatsApp Calls API
Use the **`/{Phone-Number-ID}/calls`** endpoint to initiate, manage, and terminate WhatsApp calls. This API allows businesses to handle voice calling functionality through the WhatsApp Business Platform.## Prerequisites* [User Access Token](https://developers.facebook.com/docs/facebook-login/access-tokens#usertokens) with **`whatsapp_business_messaging`** permission* `phone-number-id` for your registered WhatsApp account* Call request permission from the WhatsApp user## Call Actions- **connect**: Initiate a new call- **pre_accept**: Pre-accept a call (prepare for accepting)- **accept**: Accept an incoming call- **reject**: Reject an incoming call- **terminate**: Terminate an active call## Session Description Protocol (SDP)For actions that require audio/video negotiation (connect, accept), you must provide session information including:- `sdp_type`: Must be "offer" for connect action, "answer" for accept action- `sdp`: RFC 8866 compliant SDP information## Error HandlingError code 138006 indicates lack of call request permission for the business number from the WhatsApp user.
WhatsApp Calls API is one of 74 APIs that WhatsApp publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 6 JSON Schema definitions.
Tagged areas include Calls. The published artifact set on APIs.io includes an OpenAPI specification, a GitHub repository, API documentation, and 6 JSON Schemas.
This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version v23.0.
Requests are made against 4 base URLs: https://graph.facebook.com, https://graph.facebook.com, https://graph.facebook.com, https://graph.facebook.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
WhatsApp Calls API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (JWT) (bearerAuth).
bearerAuth— System user access token with whatsappbusinessmanagement permission. Format: Bearer YOURSYSTEMUSERACCESSTOKEN
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.
Use the /{Phone-Number-ID}/calls endpoint to initiate, manage, and terminate WhatsApp calls. This API allows businesses to handle voice calling functionality through the WhatsApp…
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are CallRequestPayload (5 properties), CallTerminateRequestPayload (3 properties), CallResponsePayload (2 properties), CallTerminateResponsePayload (1 property). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from WhatsApp 12
Other APIs WhatsApp publishes across the network.
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