openapi: 3.1.0
info:
  title: CircleCI REST API v1 Artifact Resource Class API
  description: The CircleCI REST API v1 is the legacy API that provides access to build information, project details, and user data. While still available, CircleCI recommends migrating to the v2 API for newer features and improved functionality. The v1 API supports operations for retrieving build details, triggering builds, managing SSH keys, and accessing test metadata. Authentication is handled through API tokens passed as query parameters or HTTP headers.
  version: '1.1'
  contact:
    name: CircleCI Support
    url: https://support.circleci.com
  termsOfService: https://circleci.com/terms-of-service/
servers:
- url: https://circleci.com/api/v1.1
  description: CircleCI Production API v1.1
security:
- apiToken: []
tags:
- name: Resource Class
  description: Endpoints for managing runner resource classes, which define the compute resources available for self-hosted runner jobs.
paths:
  /runner/resource-class:
    get:
      operationId: listResourceClasses
      summary: List resource classes
      description: Returns a list of runner resource classes for the specified namespace. Resource classes define the compute resources available for self-hosted runner jobs.
      tags:
      - Resource Class
      parameters:
      - name: namespace
        in: query
        required: true
        description: The namespace to list resource classes for
        schema:
          type: string
      responses:
        '200':
          description: Successfully retrieved resource classes
          content:
            application/json:
              schema:
                type: object
                properties:
                  items:
                    type: array
                    items:
                      $ref: '#/components/schemas/ResourceClass'
                    description: List of resource classes
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
    post:
      operationId: createResourceClass
      summary: Create a resource class
      description: Creates a new resource class for the specified namespace. Returns a resource class token that is only displayed once and cannot be retrieved again. This token is used by runner agents to authenticate.
      tags:
      - Resource Class
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - resource_class
              - description
              properties:
                resource_class:
                  type: string
                  description: The resource class name in namespace/name format
                  pattern: ^[a-z0-9-]+/[a-z0-9-]+$
                description:
                  type: string
                  description: A description of the resource class
      responses:
        '200':
          description: Resource class created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResourceClassCreation'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /runner/resource-class/{resource-class}:
    get:
      operationId: getResourceClass
      summary: Get a resource class
      description: Returns details about a specific resource class.
      tags:
      - Resource Class
      parameters:
      - $ref: '#/components/parameters/ResourceClassParam'
      responses:
        '200':
          description: Successfully retrieved resource class
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ResourceClass'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Resource class not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
    delete:
      operationId: deleteResourceClass
      summary: Delete a resource class
      description: Deletes a resource class. This will prevent any runners using this resource class from picking up new tasks.
      tags:
      - Resource Class
      parameters:
      - $ref: '#/components/parameters/ResourceClassParam'
      responses:
        '200':
          description: Resource class deleted successfully
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Resource class not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  parameters:
    ResourceClassParam:
      name: resource-class
      in: path
      required: true
      description: The resource class in namespace/name format
      schema:
        type: string
  schemas:
    ResourceClassCreation:
      type: object
      properties:
        id:
          type: string
          format: uuid
          description: The unique identifier of the resource class
        resource_class:
          type: string
          description: The resource class name in namespace/name format
        description:
          type: string
          description: A description of the resource class
        token:
          type: string
          description: The resource class token. This is only displayed once and cannot be retrieved again. Store it securely.
    ResourceClass:
      type: object
      properties:
        id:
          type: string
          format: uuid
          description: The unique identifier of the resource class
        resource_class:
          type: string
          description: The resource class name in namespace/name format
        description:
          type: string
          description: A description of the resource class
    ErrorResponse:
      type: object
      properties:
        message:
          type: string
          description: A human-readable error message
  securitySchemes:
    apiToken:
      type: apiKey
      in: header
      name: Circle-Token
      description: Personal API token for authenticating with the CircleCI API. Can also be passed as a query parameter.
externalDocs:
  description: CircleCI API v1 Reference
  url: https://circleci.com/docs/api/v1/