Webex Conference Controls API

openapi: 3.2.0
info:
  title: Webex Conference Controls API
  version: 1.0.0
  description: 'Operations tagged Conference Controls across 2 of this provider''s published API definitions: webex-cloud-calling-openapi.json, webex-conference-controls-api-openapi.yml. Each path carries the servers of the definition it was published in.'
  x-provenance:
    method: harvested
    authored_by: Cisco Webex
    harvested_by: API Evangelist
    harvested_on: '2026-08-19'
    first_party: true
    note: Published by Cisco. Retrieved unmodified except for this x-provenance block.
    provider_published: true
    derived_view: Per-tag view of webex-cloud-calling-openapi.json, the provider's source document. Operations and schemas are the provider's, unmodified; only the partition is ours.
    derived_from: webex-cloud-calling-openapi.json
    operation_coverage: 10/10
  x-evidence:
  - type: source
    url: https://github.com/webex/webex-openapi-specs/blob/main/public-spec/webex-cloud-calling.json
  - type: raw
    url: https://raw.githubusercontent.com/webex/webex-openapi-specs/main/public-spec/webex-cloud-calling.json
tags:
- name: Conference Controls
paths:
  /telephony/conference:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Start Conference
      operationId: Start Conference
      description: 'Join the user''s calls into a conference.  A minimum of two call IDs are required. Each call ID identifies an existing call between the user

        and a participant to be added to the conference.'
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callIds:
              - Y2lzY29z...,Y2lzY30z...
              lineOwnerId: Y2lzY29z...
            schema:
              type: object
              required:
              - callIds
              properties:
                callIds:
                  type: array
                  items:
                    type: string
                    example: Y2lzY29z...,Y2lzY30z...
                  description: List of call identifiers of the participants to join into the conference. A minimum of two call IDs are required.
                lineOwnerId:
                  type: string
                  example: Y2lzY29z...Y
                  description: The ID of a user, workspace, or virtual line for which there is a secondary line on a device owned by the user invoking the API.
    delete:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Release Conference
      operationId: Release Conference
      description: Release the conference (the host and all participants). Note that for a 3WC (three-way call) the [Transfer API](/docs/api/v1/call-controls/transfer) can be used to perform an attended transfer so that the participants remain connected.
      tags:
      - Conference Controls
      parameters:
      - name: lineOwnerId
        in: query
        description: The ID of a user, workspace, or virtual line for which there is a secondary line on a device owned by the user invoking the API.
        example: Y2lzY29z...
        schema:
          type: string
    get:
      responses:
        '200':
          description: OK
          headers: {}
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConferenceDetails'
              example:
                state: connected
                appearance: 3
                created: '2023-03-02T15:00:00.000Z'
                muted: false
                participants:
                - callId: Y2lzY29zcGFyazovL3VzL0NBTEwvQkNMRC9jYWxsaGFsZi00ODg6MA
                  muted: false
                  deafened: false
                - callId: Y2lzY29zcGFyazovL3VzL0NBTEwvQkNMRC9jYWxsaGFsZi00ODg6MQ
                  muted: false
                  deafened: false
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Get Conference Details
      operationId: Get Conference Details
      description: Get the details of the conference.  An empty JSON object body is returned if there is no conference.
      tags:
      - Conference Controls
      parameters:
      - name: lineOwnerId
        in: query
        description: The ID of a user, workspace, or virtual line for which there is a secondary line on a device owned by the user invoking the API.
        example: Y2lzY29z...
        schema:
          type: string
  /telephony/conference/addParticipant:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Add Participant
      operationId: Add Participant
      description: Adds a participant to an existing conference.  The request body contains the participant's call ID.
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callId: Y2lzY29z...
              lineOwnerId: Y2lzY29z...
            schema:
              type: object
              required:
              - callId
              properties:
                callId:
                  type: string
                  example: Y2lzY29z...
                  description: The call identifier of the participant to add.
                lineOwnerId:
                  type: string
                  example: Y2lzY29zc...
                  description: The ID of a user, workspace, or virtual line for which there is a secondary line on a device owned by the user invoking the API.
  /telephony/conference/mute:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Mute
      operationId: Mute
      description: Mutes the host or a participant. Mutes the host when no request body is provided (i.e. media stream from the host will not be transmitted to the conference).  Mutes a participant when the request body contains the participant's call ID (i.e. media stream from the participant will not be transmitted to the conference).
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callId: Y2lzY29z...
            schema:
              type: object
              properties:
                callId:
                  type: string
                  example: Y2lzY29z...
                  description: The call identifier of the participant to mute. The conference host is muted when this attribute is not provided.
  /telephony/conference/unmute:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Unmute
      operationId: Unmute
      description: Unmutes the host or a participant. Unmutes the host when no request body is provided (i.e. media stream from the host will be transmitted to the conference).  Unmutes a participant when the request body contains the participant's call ID (i.e. media stream from the participant will be transmitted to the conference).
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callId: Y2lzY29z...
            schema:
              type: object
              properties:
                callId:
                  type: string
                  example: Y2lzY29z...
                  description: The call identifier of the participant to unmute. The conference host is unmuted when this attribute is not provided.
  /telephony/conference/deafen:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Deafen Participant
      operationId: Deafen Participant
      description: 'Deafens a participant (i.e. media stream will not be transmitted to the participant).

        The request body contains the call ID of the participant to deafen'
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callId: Y2lzY29z...
            schema:
              type: object
              required:
              - callId
              properties:
                callId:
                  type: string
                  example: Y2lzY29z...
                  description: The call identifier of the participant to deafen.
  /telephony/conference/undeafen:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Undeafen Participant
      operationId: Undeafen Participant
      description: "Undeafens a participant (i.e. resume transmitting the conference media stream to the participant). \nThe request body contains the call ID of the participant to undeafen."
      tags:
      - Conference Controls
      parameters: []
      requestBody:
        content:
          application/json:
            example:
              callId: Y2lzY29z...
            schema:
              type: object
              required:
              - callId
              properties:
                callId:
                  type: string
                  example: Y2lzY29z...
                  description: The call identifier of the participant to undeafen.
  /telephony/conference/hold:
    post:
      responses:
        '204':
          description: No Content
          headers: {}
          content: {}
        '400':
          description: 'Bad Request: The request was invalid or cannot be otherwise served. An accompanying error message will explain further.'
        '401':
          description: 'Unauthorized: Authentication credentials were missing or incorrect.'
        '403':
          description: 'Forbidden: The request is understood, but it has been refused or access is not allowed.'
        '404':
          description: 'Not Found: The URI requested is invalid or the resource requested, such as a user, does not exist. Also returned when the requested format is not supported by the requested method.'
        '405':
          description: 'Method Not Allowed: The request was made to a resource using an HTTP request method that is not supported.'
        '409':
          description: 'Conflict: The request could not be processed because it conflicts with some established rule of the system. For example, a person may not be added to a room more than once.'
        '410':
          description: 'Gone: The requested resource is no longer available.'
        '415':
          description: 'Unsupported Media Type: The request was made to a resource without specifying a media type or used a media type that is not supported.'
        '423':
          description: 'Locked: The requested resource is temporarily unavailable. A Retry-After header may be present that specifies how many seconds you need to wait before attempting the request again.'
        '428':
          description: 'Precondition Required: File(s) cannot be scanned for malware and need to be force downloaded.'
        '429':
          description: 'Too Many Requests: Too many requests have been sent in a given amount of time and the request has been rate limited. A Retry-After header should be present that specifies how many seconds you need to wait before a successful request can be made.'
        '500':
          description: 'Internal Server Error: Something went wrong on the server. If the issue persists, feel free to contact the [Webex Developer Support team](/explore/support).'
        '502':
          description: 'Bad Gateway: The server received an invalid response from an upstream server while processing the request. Try again later.'
        '503':
          description: 'Service Unavailable: Server is overloaded with requests. Try again later.'
        '504':
          description: 'Gateway Timeout: An upstream server failed to respond on time. If your query uses max parameter, please try to reduce it.'
      summary: Hold
      operationId: Hold
      description: Hold the conference host.  There is no request body.
      tags:
      - Conference Controls
      parameters:
      - name: lineOwnerId
        in: query
        description: The ID of a user, workspace, or virtual line for which there is a secondary line on a device owned by the user invoking the API.
        example: Y2lzY29z...
        schema:
    

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# Full source: https://raw.githubusercontent.com/api-evangelist/webex/refs/heads/main/openapi/webex-conference-controls-api-openapi.yml