Fastly Condition API

openapi: 3.2.0
info:
  title: Fastly VCL Services Condition API
  description: The Fastly VCL Services API provides programmatic access to configure Varnish Configuration Language (VCL) objects that power most Fastly services. Developers can upload custom VCL code or use the API to generate VCL through configuration objects including backends, conditions, cache settings, request settings, response objects, headers, and VCL snippets. This API is central to defining how Fastly processes, routes, and caches HTTP requests at the edge.
  version: '1.0'
  contact:
    name: Fastly Support
    url: https://support.fastly.com
  termsOfService: https://www.fastly.com/terms
servers:
- url: https://api.fastly.com
  description: Fastly API Production Server
security:
- apiKeyAuth: []
tags:
- name: Condition
  description: Operations for managing conditions that control when configuration objects are applied during request processing.
paths:
  /service/{service_id}/version/{version_id}/condition:
    get:
      operationId: listConditions
      summary: List conditions
      description: Retrieves a list of all conditions configured for a specific version of a Fastly service.
      tags:
      - Condition
      parameters:
      - $ref: '#/components/parameters/serviceId'
      - $ref: '#/components/parameters/versionId'
      responses:
        '200':
          description: Successfully retrieved the list of conditions.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Condition'
        '401':
          description: Unauthorized. The API token is missing or invalid.
    post:
      operationId: createCondition
      summary: Create a condition
      description: Creates a new condition for a specific version of a Fastly service. Conditions use VCL syntax to define when configuration objects should be applied during request processing.
      tags:
      - Condition
      parameters:
      - $ref: '#/components/parameters/serviceId'
      - $ref: '#/components/parameters/versionId'
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Condition'
      responses:
        '200':
          description: Successfully created the condition.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Condition'
        '400':
          description: Bad request. Missing or invalid parameters.
        '401':
          description: Unauthorized. The API token is missing or invalid.
components:
  parameters:
    serviceId:
      name: service_id
      in: path
      required: true
      description: The alphanumeric string identifying the Fastly service.
      schema:
        type: string
    versionId:
      name: version_id
      in: path
      required: true
      description: The integer identifying the service version.
      schema:
        type: integer
  schemas:
    Condition:
      type: object
      description: A condition uses VCL syntax to define when a configuration object should be applied during request processing.
      properties:
        name:
          type: string
          description: The name of the condition.
        statement:
          type: string
          description: A VCL conditional expression that defines when the condition evaluates to true.
        type:
          type: string
          description: The type of condition, determining when it is evaluated.
          enum:
          - REQUEST
          - CACHE
          - RESPONSE
          - PREFETCH
        priority:
          type: integer
          description: The priority of the condition, with lower numbers evaluated first.
          default: 10
        comment:
          type: string
          description: A freeform descriptive note about the condition.
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: Fastly-Key
      description: API token used to authenticate requests to the Fastly API.
externalDocs:
  description: Fastly VCL Services API Documentation
  url: https://www.fastly.com/documentation/reference/api/vcl-services/