openapi: 3.1.0
info:
  title: OSIsoft PI Web AssetServers API
  description: OSIsoft PI Web API (now part of AVEVA) provides a REST interface for accessing the PI System process historian. APIs enable real-time and historical time-series data retrieval, event frame queries, asset framework hierarchy navigation, and calculated data for industrial process monitoring.
  version: 2023.2.0
  contact:
    name: AVEVA Support
    url: https://softwaresupport.aveva.com
  license:
    name: AVEVA Software License
    url: https://www.aveva.com/legal/
servers:
- url: https://{piwebapi_host}/piwebapi
  description: PI Web API server
  variables:
    piwebapi_host:
      default: piwebapi.example.com
      description: PI Web API server hostname
security:
- basicAuth: []
- kerberos: []
tags:
- name: AssetServers
  description: Asset Framework server navigation
paths:
  /assetservers:
    get:
      operationId: listAssetServers
      summary: List Asset Framework servers
      description: Returns all registered PI Asset Framework (AF) servers.
      tags:
      - AssetServers
      responses:
        '200':
          description: Asset server list
          content:
            application/json:
              schema:
                type: object
                properties:
                  Items:
                    type: array
                    items:
                      $ref: '#/components/schemas/AssetServer'
components:
  schemas:
    AssetServer:
      type: object
      properties:
        WebId:
          type: string
        Id:
          type: string
          format: uuid
        Name:
          type: string
        Path:
          type: string
        IsConnected:
          type: boolean
        ServerVersion:
          type: string
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication
    kerberos:
      type: http
      scheme: negotiate
      description: Kerberos/Windows Integrated Authentication