openapi: 3.1.0
info:
  title: kgateway Kubernetes Gateway AIBackend DirectResponse API
  description: kgateway is the most widely deployed gateway in Kubernetes for microservices and AI agents. It is a feature-rich, fast, and flexible Kubernetes-native ingress controller and next-generation API gateway built on top of Envoy proxy and the Kubernetes Gateway API. kgateway provides custom resource definitions (CRDs) under the gateway.kgateway.dev API group for configuring traffic policies, backends, direct responses, gateway extensions, gateway parameters, HTTP listener policies, and AI backends. These resources are managed through the Kubernetes API server.
  version: 2.1.0
  contact:
    name: kgateway
    url: https://kgateway.dev
  license:
    name: Apache 2.0
    url: https://github.com/kgateway-dev/kgateway/blob/main/LICENSE
servers:
- url: https://{kubernetes-api-server}/apis/gateway.kgateway.dev/v1alpha1
  description: Kubernetes API Server - kgateway Custom Resources
  variables:
    kubernetes-api-server:
      default: kubernetes.default.svc
      description: The Kubernetes API server hostname
security:
- BearerAuth: []
tags:
- name: DirectResponse
  description: Configure Gateways to directly respond to incoming requests with a custom HTTP response code and body without forwarding to a backend service.
paths:
  /namespaces/{namespace}/directresponses:
    get:
      operationId: listDirectResponses
      summary: Kgateway List DirectResponse resources
      description: List all DirectResponse resources in the specified namespace. DirectResponse resources allow Gateways to directly respond to requests with custom HTTP response codes and bodies.
      tags:
      - DirectResponse
      parameters:
      - $ref: '#/components/parameters/Namespace'
      - $ref: '#/components/parameters/LabelSelector'
      - $ref: '#/components/parameters/Limit'
      - $ref: '#/components/parameters/Continue'
      responses:
        '200':
          description: Successfully retrieved list of DirectResponse resources.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DirectResponseList'
        '401':
          description: Unauthorized
    post:
      operationId: createDirectResponse
      summary: Kgateway Create a DirectResponse
      description: Create a DirectResponse resource to configure a Gateway to directly respond to incoming requests with a custom HTTP response.
      tags:
      - DirectResponse
      parameters:
      - $ref: '#/components/parameters/Namespace'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DirectResponse'
      responses:
        '201':
          description: Successfully created DirectResponse.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DirectResponse'
        '401':
          description: Unauthorized
        '409':
          description: Conflict - resource already exists
  /namespaces/{namespace}/directresponses/{name}:
    get:
      operationId: getDirectResponse
      summary: Kgateway Get a DirectResponse
      description: Retrieve a specific DirectResponse resource by name and namespace.
      tags:
      - DirectResponse
      parameters:
      - $ref: '#/components/parameters/Namespace'
      - $ref: '#/components/parameters/Name'
      responses:
        '200':
          description: Successfully retrieved DirectResponse.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DirectResponse'
        '401':
          description: Unauthorized
        '404':
          description: DirectResponse not found
    put:
      operationId: replaceDirectResponse
      summary: Kgateway Replace a DirectResponse
      description: Replace a specific DirectResponse resource.
      tags:
      - DirectResponse
      parameters:
      - $ref: '#/components/parameters/Namespace'
      - $ref: '#/components/parameters/Name'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DirectResponse'
      responses:
        '200':
          description: Successfully replaced DirectResponse.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DirectResponse'
        '401':
          description: Unauthorized
        '404':
          description: DirectResponse not found
    delete:
      operationId: deleteDirectResponse
      summary: Kgateway Delete a DirectResponse
      description: Delete a specific DirectResponse resource.
      tags:
      - DirectResponse
      parameters:
      - $ref: '#/components/parameters/Namespace'
      - $ref: '#/components/parameters/Name'
      responses:
        '200':
          description: Successfully deleted DirectResponse.
        '401':
          description: Unauthorized
        '404':
          description: DirectResponse not found
components:
  parameters:
    Name:
      name: name
      in: path
      required: true
      description: The name of the resource.
      schema:
        type: string
    Namespace:
      name: namespace
      in: path
      required: true
      description: The Kubernetes namespace.
      schema:
        type: string
    Limit:
      name: limit
      in: query
      required: false
      description: Maximum number of resources to return.
      schema:
        type: integer
    Continue:
      name: continue
      in: query
      required: false
      description: Continue token for paginated list requests.
      schema:
        type: string
    LabelSelector:
      name: labelSelector
      in: query
      required: false
      description: A selector to restrict the list of returned objects by labels.
      schema:
        type: string
  schemas:
    DirectResponse:
      type: object
      description: DirectResponse configures a Gateway to directly respond to incoming requests with a custom HTTP response code and body.
      properties:
        apiVersion:
          type: string
          enum:
          - gateway.kgateway.dev/v1alpha1
        kind:
          type: string
          enum:
          - DirectResponse
        metadata:
          $ref: '#/components/schemas/ObjectMeta'
        spec:
          type: object
          description: DirectResponseSpec defines the desired state of a DirectResponse.
          properties:
            statusCode:
              type: integer
              description: HTTP status code to return.
              minimum: 200
              maximum: 599
            body:
              type: string
              description: Response body to return.
          required:
          - statusCode
        status:
          type: object
          description: Status of the DirectResponse.
          properties:
            conditions:
              type: array
              items:
                type: object
                properties:
                  type:
                    type: string
                  status:
                    type: string
                  reason:
                    type: string
                  message:
                    type: string
                  lastTransitionTime:
                    type: string
                    format: date-time
    ObjectMeta:
      type: object
      description: Standard Kubernetes object metadata.
      properties:
        name:
          type: string
          description: Name of the resource.
        namespace:
          type: string
          description: Namespace of the resource.
        labels:
          type: object
          additionalProperties:
            type: string
          description: Map of string keys and values for organizing resources.
        annotations:
          type: object
          additionalProperties:
            type: string
          description: Annotations for storing arbitrary metadata.
        resourceVersion:
          type: string
          description: An opaque value that represents the internal version of this object.
        creationTimestamp:
          type: string
          format: date-time
          description: Timestamp representing the server time when this object was created.
    DirectResponseList:
      type: object
      description: List of DirectResponse resources.
      properties:
        apiVersion:
          type: string
        kind:
          type: string
          enum:
          - DirectResponseList
        metadata:
          type: object
          properties:
            continue:
              type: string
            resourceVersion:
              type: string
        items:
          type: array
          items:
            $ref: '#/components/schemas/DirectResponse'
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: Kubernetes API bearer token authentication. Use a service account token or kubeconfig token.
externalDocs:
  description: kgateway API Reference Documentation
  url: https://kgateway.dev/docs/envoy/latest/reference/api/