Fastly

Fastly Custom VCL API

Operations for uploading and managing full custom VCL files.

Documentation GitHub OpenAPI

Operations 2

GET /service/{service_id}/version/{version_id}/vcl List custom VCL files #

POST /service/{service_id}/version/{version_id}/vcl Upload custom VCL #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Fastly VCL Services Custom VCL 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: Custom VCL
  description: Operations for uploading and managing full custom VCL files.
paths:
  /service/{service_id}/version/{version_id}/vcl:
    get:
      operationId: listCustomVcl
      summary: List custom VCL files
      description: Retrieves a list of all custom VCL files uploaded for a specific version of a Fastly service.
      tags:
      - Custom VCL
      parameters:
      - $ref: '#/components/parameters/serviceId'
      - $ref: '#/components/parameters/versionId'
      responses:
        '200':
          description: Successfully retrieved the list of custom VCL files.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/CustomVcl'
        '401':
          description: Unauthorized. The API token is missing or invalid.
    post:
      operationId: createCustomVcl
      summary: Upload custom VCL
      description: Uploads a full custom VCL file for a specific version of a Fastly service.
      tags:
      - Custom VCL
      parameters:
      - $ref: '#/components/parameters/serviceId'
      - $ref: '#/components/parameters/versionId'
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/CustomVcl'
      responses:
        '200':
          description: Successfully uploaded the custom VCL file.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomVcl'
        '400':
          description: Bad request. Missing or invalid parameters.
        '401':
          description: Unauthorized. The API token is missing or invalid.
components:
  schemas:
    CustomVcl:
      type: object
      description: A full custom VCL file uploaded for a service version.
      properties:
        name:
          type: string
          description: The name of the custom VCL file.
        content:
          type: string
          description: The VCL source code.
        main:
          type: boolean
          description: Whether this is the main VCL file for the service version.
  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
  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/