Cisco Expressway NTP API

openapi: 3.2.0
info:
  title: Cisco Expressway Configuration Admin Account NTP 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
  x-provenance:
    method: derived
    authored_by: API Evangelist
    derived_on: '2026-08-19'
    first_party: false
    provider_published: false
    source: Modelled from the provider's public HTML documentation.
    note: 'Not published by the provider. Probed 2026-08-19: no anonymously fetchable first-party contract. Served by each customer''s own Expressway appliance; no central spec.'
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: NTP
  description: NTP server configuration for time synchronization
paths:
  /v1/provisioning/common/time/ntpserver:
    get:
      operationId: listNtpServers
      summary: Cisco Expressway List all configured NTP servers
      description: Retrieves the list of all NTP servers configured on the Expressway for time synchronization. Supports filtering by name or address.
      tags:
      - NTP
      responses:
        '200':
          description: NTP server list retrieved successfully
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/NtpServer'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
    post:
      operationId: createNtpServer
      summary: Cisco Expressway Add a new NTP server
      description: Adds a new NTP server entry to the Expressway configuration for time synchronization. Up to five NTP servers can be configured.
      tags:
      - NTP
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NtpServerInput'
      responses:
        '200':
          description: NTP server created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NtpServer'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '409':
          $ref: '#/components/responses/Conflict'
    put:
      operationId: updateNtpServer
      summary: Cisco Expressway Modify an NTP server entry
      description: Updates an existing NTP server configuration on the Expressway.
      tags:
      - NTP
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/NtpServerInput'
      responses:
        '200':
          description: NTP server updated successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NtpServer'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteNtpServer
      summary: Cisco Expressway Delete an NTP server entry
      description: Removes an NTP server from the Expressway configuration.
      tags:
      - NTP
      responses:
        '200':
          description: NTP server deleted successfully
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    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'
    BadRequest:
      description: The request body contains invalid data or missing required fields.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Conflict:
      description: A resource with the same identifier already exists.
      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'
  schemas:
    NtpServer:
      type: object
      description: NTP server configuration entry
      properties:
        Index:
          type: integer
          description: Index position of the NTP server (1-5)
          minimum: 1
          maximum: 5
        Address:
          type: string
          description: Hostname or IP address of the NTP server
          examples:
          - pool.ntp.org
        AuthenticationMode:
          type: string
          description: Authentication mode for the NTP connection
          enum:
          - 'Off'
          - Symmetric key
      required:
      - Address
    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
    NtpServerInput:
      type: object
      description: Input for creating or updating an NTP server entry
      properties:
        Index:
          type: integer
          description: Index position for the NTP server (1-5)
          minimum: 1
          maximum: 5
        Address:
          type: string
          description: Hostname or IP address of the NTP server
          examples:
          - pool.ntp.org
        AuthenticationMode:
          type: string
          description: Authentication mode for the NTP connection
          enum:
          - 'Off'
          - Symmetric key
        KeyNumber:
          type: integer
          description: Key number for symmetric key authentication
        KeyHash:
          type: string
          description: Key hash value for symmetric key authentication
      required:
      - Address
  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