---
title: "Join a call."
method: POST
path: "/calling/serverCalls/{serverCallId}/:join"
tags: ["ServerCall"]
---

# Join a call.

`POST /calling/serverCalls/{serverCallId}/:join`

Join a call.

## Path parameters

- `serverCallId` string, required

## Query parameters

- `api-version` string, required

## Request body

- JoinCallRequest — The request payload for join call.
  - `source` CommunicationIdentifier, required — unresolved $ref
  - `subject` string — The subject.
  - `callbackUri` string, required — The callback URI.
  - `requestedMediaTypes` MediaType[] — The requested modalities.
  - `requestedCallEvents` EventSubscriptionType[] — The requested call events to subscribe to.

## Response `202`

Returns the join call response.

- JoinCallResult — The response payload of the join call operation.
  - `callConnectionId` string — The call connection id.

## Other responses

- `400` — BadRequest
- `401` — Unauthorized
- `403` — Forbidden
- `500` — InternalServerError

---

[API](https://skmtc.dev/azure/apis/communication-callingserver.md) · [All operations](https://skmtc.dev/azure/apis/communication-callingserver/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/azure/communication-callingserver/revisions/85ed6f36b472/schema)