Azure Communication Services REST API

openapi: 3.1.0
info:
  title: Azure Communication Services REST API
  description: Azure Communication Services REST APIs provide messaging, telephony, identity, chat, and
    email capabilities. Authentication uses HMAC SHA256 or Azure AD tokens.
  version: '2024-08-01'
externalDocs:
  description: Azure Communication Services REST API Documentation
  url: https://learn.microsoft.com/en-us/rest/api/communication/
servers:
- url: https://{resource}.communication.azure.com
  variables:
    resource:
      default: myresource
tags:
- name: Identity
- name: SMS
- name: Email
- name: Chat
security:
- hmac: []
paths:
  /identities:
    post:
      operationId: createIdentity
      summary: ACS Create identity
      description: Creates a new communication user identity.
      tags:
      - Identity
      parameters:
      - name: api-version
        in: query
        required: true
        schema:
          type: string
      responses:
        '201':
          description: Identity created
          content:
            application/json:
              schema:
                type: object
                properties:
                  identity:
                    type: object
                    properties:
                      id:
                        type: string
  /identities/{id}:
    parameters:
    - name: id
      in: path
      required: true
      schema:
        type: string
    - name: api-version
      in: query
      required: true
      schema:
        type: string
    delete:
      operationId: deleteIdentity
      summary: ACS Delete identity
      description: Deletes a communication user identity.
      tags:
      - Identity
      responses:
        '204':
          description: Identity deleted
  /identities/{id}/:issueAccessToken:
    parameters:
    - name: id
      in: path
      required: true
      schema:
        type: string
    - name: api-version
      in: query
      required: true
      schema:
        type: string
    post:
      operationId: issueAccessToken
      summary: ACS Issue access token
      description: Issues a scoped access token for an identity.
      tags:
      - Identity
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                scopes:
                  type: array
                  items:
                    type: string
      responses:
        '200':
          description: Token issued
          content:
            application/json:
              schema:
                type: object
                properties:
                  token:
                    type: string
                  expiresOn:
                    type: string
  /sms:
    post:
      operationId: sendSms
      summary: ACS Send SMS
      description: Sends one or more SMS messages.
      tags:
      - SMS
      parameters:
      - name: api-version
        in: query
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                from:
                  type: string
                smsRecipients:
                  type: array
                  items:
                    type: object
                message:
                  type: string
      responses:
        '202':
          description: Send accepted
          content:
            application/json:
              schema:
                type: object
  /emails:send:
    post:
      operationId: sendEmail
      summary: ACS Send email
      description: Queues an email for delivery.
      tags:
      - Email
      parameters:
      - name: api-version
        in: query
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '202':
          description: Email accepted
          headers:
            Operation-Location:
              schema:
                type: string
components:
  securitySchemes:
    hmac:
      type: apiKey
      in: header
      name: Authorization
      description: HMAC-SHA256 signed Authorization header
x-generated-from: https://learn.microsoft.com/en-us/rest/api/communication/
x-generated-by: claude-crawl-2026-05-08