Microsoft Azure Communication Services

Azure Communication Services Call Automation API

Call Automation API: answer, redirect and create calls, play media, recognize DTMF/speech, record and transfer server-side. 34 operations, data-plane version 2026-03-12, served from the customer's Communication Services resource endpoint.

GitHub OpenAPI

Operations 34

POST /calling/callConnections Create an outbound call. #
POST /calling/callConnections:answer Answer a Call. #
POST /calling/callConnections:redirect Redirect a call. #
POST /calling/callConnections:reject Reject the call. #
POST /calling/callConnections:connect Create a Connection to a CallLocator. #
GET /calling/callConnections/{callConnectionId} Get the detail properties of an ongoing call. #
DELETE /calling/callConnections/{callConnectionId} Hang up call automation service from the call. This will make call automation service leave the call, but does not terminate if there are more than 1 caller in the call. #
POST /calling/callConnections/{callConnectionId}:terminate Terminate a call using CallConnectionId. #
POST /calling/callConnections/{callConnectionId}:transferToParticipant Transfer the call to a participant. #
POST /calling/callConnections/{callConnectionId}:play Plays audio to participants in the call. #
POST /calling/callConnections/{callConnectionId}:startTranscription Starts transcription in the call #
POST /calling/callConnections/{callConnectionId}:stopTranscription Stops transcription in the call. #
POST /calling/callConnections/{callConnectionId}:updateTranscription UpdateTranscription Api. #
POST /calling/callConnections/{callConnectionId}:cancelAllMediaOperations Cancel all media operations in a call. #
POST /calling/callConnections/{callConnectionId}:recognize Recognize media from call. #
POST /calling/callConnections/{callConnectionId}:startContinuousDtmfRecognition Start continuous Dtmf recognition by subscribing to tones. #
POST /calling/callConnections/{callConnectionId}:stopContinuousDtmfRecognition Stop continuous Dtmf recognition by unsubscribing to tones. #
POST /calling/callConnections/{callConnectionId}:sendDtmfTones Send dtmf tones. #
POST /calling/callConnections/{callConnectionId}:hold Hold participant from the call using identifier. #
POST /calling/callConnections/{callConnectionId}:unhold Unhold participants from the call using identifier. #
POST /calling/callConnections/{callConnectionId}:startMediaStreaming Starts media streaming in the call #
POST /calling/callConnections/{callConnectionId}:stopMediaStreaming Stops media streaming in the call #
GET /calling/callConnections/{callConnectionId}/participants Get participants from a call. Recording and transcription bots are omitted from this list. #
POST /calling/callConnections/{callConnectionId}/participants:add Add a participant to the call. #
POST /calling/callConnections/{callConnectionId}/participants:remove Remove a participant from the call using identifier. #
POST /calling/callConnections/{callConnectionId}/participants:mute Mute participants from the call using identifier. #
POST /calling/callConnections/{callConnectionId}/participants:cancelAddParticipant Cancel add participant operation. #
POST /calling/callConnections/{callConnectionId}/participants:moveHere Move a participant to the call. #
GET /calling/callConnections/{callConnectionId}/participants/{participantRawId} Get participant from a call. #
POST /calling/recordings Start recording the call. #
GET /calling/recordings/{recordingId} Get call recording properties. #
DELETE /calling/recordings/{recordingId} Stop recording the call. #
POST /calling/recordings/{recordingId}:pause Pause recording the call. #
POST /calling/recordings/{recordingId}:resume Resume recording the call. #

Documentation

📖
Documentation
https://learn.microsoft.com/en-us/azure/communication-services/

Specifications

⚙
OpenAPI
https://artifacts.apis.io/microsoft-azure-communication-services/openapi/microsoft-azure-communication-services-callautomation-api-openapi.yml
⚙
OpenAPI
https://raw.githubusercontent.com/Azure/azure-rest-api-specs/main/specification/communication/data-plane/CallAutomation/stable/2026-03-12/communicationservicescallautomation.json

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-start-call-recording-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-add-participant-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-call-connection-properties-schema.json
📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-create-call-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-play-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/microsoft-azure-communication-services/json-schema/microsoft-azure-communication-services-recognize-request-schema.json

Other Resources

🔗
APIsJSON
https://artifacts.apis.io/microsoft-azure-communication-services/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/microsoft-azure-communication-services:microsoft-azure-communication-services-callautomation-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

microsoft-azure-communication-services-callautomation-api-openapi.yml Raw ↑ 
openapi: 3.0.3
info:
  title: Azure Communication Service Call Automation APIs
  description: Azure Communication Service Call Automation APIs
  version: '2026-03-12'
servers:


# --- truncated at 32 KB (133 KB total) ---
# Full source: https://artifacts.apis.io/microsoft-azure-communication-services/openapi/microsoft-azure-communication-services-callautomation-api-openapi.yml