openapi: 3.1.0
info:
  title: Cisco Expressway Configuration Admin Account Resource Usage API
  description: RESTful API for configuring and managing Cisco Expressway systems including zones, search rules, transforms, DNS servers, NTP servers, SFTP configuration, system upgrades, and admin account management. The API uses JSON Schema version 4 for request and response schemas and is self-documented via RAML definitions available at /api/raml on the Expressway system. All endpoints require HTTPS and HTTP Basic Authentication using Expressway administrator credentials.
  version: 14.2.0
  contact:
    name: Cisco TAC
    email: tac@cisco.com
    url: https://www.cisco.com/c/en/us/support/unified-communications/expressway-series/tsd-products-support-series-home.html
  license:
    name: Cisco EULA
    url: https://www.cisco.com/c/en/us/about/legal/cloud-and-software/end_user_license_agreement.html
  x-logo:
    url: https://www.cisco.com/c/dam/en/us/products/collateral/unified-communications/expressway-series/datasheet-c78-733751.jpg
servers:
- url: https://{host}/api
  description: Cisco Expressway server
  variables:
    host:
      default: expressway.example.com
      description: The FQDN or IP address of the Cisco Expressway node. The API is only accessible via HTTPS.
security:
- basicAuth: []
tags:
- name: Resource Usage
  description: System resource utilization metrics
paths:
  /status/common/resourceusage:
    get:
      operationId: getResourceUsage
      summary: Cisco Expressway Retrieve system resource usage
      description: Returns current system resource utilization metrics including rich media session counts (current and peak), registration counts by type, license consumption percentage, system capacity utilization, and MRA device registration tracking.
      tags:
      - Resource Usage
      responses:
        '200':
          description: Resource usage retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResourceUsage'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
  /status/common/turnrelays:
    get:
      operationId: listTurnRelays
      summary: Cisco Expressway List active TURN relay allocations
      description: Retrieves the list of all active TURN relay allocations on the Expressway including client IP addresses, media destination addresses, connection protocol, active relay count per client, and permission, channel, and request counters.
      tags:
      - Resource Usage
      responses:
        '200':
          description: TURN relay list retrieved successfully
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/TurnRelay'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
components:
  schemas:
    ResourceUsage:
      type: object
      description: System resource utilization metrics for the Expressway
      properties:
        RichMediaSessionsCurrent:
          type: integer
          description: Number of currently active rich media sessions
        RichMediaSessionsPeak:
          type: integer
          description: Peak number of rich media sessions since last restart
        RichMediaSessionsCapacity:
          type: integer
          description: Maximum rich media session capacity
        SIPRegistrations:
          type: integer
          description: Number of active SIP registrations
        H323Registrations:
          type: integer
          description: Number of active H.323 registrations
        TotalRegistrations:
          type: integer
          description: Total number of active registrations
        RegistrationCapacity:
          type: integer
          description: Maximum registration capacity
        LicenseUtilizationPercent:
          type: number
          format: float
          description: Current license utilization as a percentage
          minimum: 0
          maximum: 100
        SystemCapacityPercent:
          type: number
          format: float
          description: Overall system capacity utilization as a percentage
          minimum: 0
          maximum: 100
        MRADevices:
          type: integer
          description: Number of Mobile and Remote Access devices registered
        TURNRelaysActive:
          type: integer
          description: Number of active TURN relay allocations
    TurnRelay:
      type: object
      description: An active TURN relay allocation on the Expressway
      properties:
        ClientAddress:
          type: string
          description: IP address of the TURN client
          examples:
          - 192.168.1.100
        MediaDestination:
          type: string
          description: Media destination address
        ConnectionProtocol:
          type: string
          description: Connection protocol used
          enum:
          - TCP
          - UDP
        ActiveRelays:
          type: integer
          description: Number of active relays for this client
        Permissions:
          type: integer
          description: Number of permissions created
        Channels:
          type: integer
          description: Number of channels bound
        Requests:
          type: integer
          description: Total number of requests processed
    Error:
      type: object
      description: Standard error response from the Expressway API
      properties:
        error:
          type: string
          description: Error code or type
        message:
          type: string
          description: Human-readable error description
  responses:
    Unauthorized:
      description: Authentication credentials are missing or invalid. The API requires HTTP Basic Authentication with administrator credentials over HTTPS.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Forbidden:
      description: The authenticated user does not have sufficient permissions for this operation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication using Expressway administrator credentials. The API is only accessible via HTTPS.
externalDocs:
  description: Cisco Expressway REST API Summary Guide (X14.2)
  url: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X14-2/rest-api/exwy_b_cisco-expressway-rest-api-summary-guide--x142/exwy_m_using-the-expressway-rest-api.html