WunderGraph Feature Flags API

openapi: 3.2.0
info:
  title: WunderGraph Cosmo Platform Feature Flags API
  description: The WunderGraph Cosmo Platform API provides programmatic access to manage federated GraphQL architectures at scale.
  version: 1.0.0
  contact:
    name: WunderGraph
    url: https://wundergraph.com
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://cosmo-cp.wundergraph.com
  description: WunderGraph Cosmo Cloud Control Plane
tags:
- name: Feature Flags
  description: Manage feature flags for gradual rollout of graph changes.
paths:
  /v1/feature-flags:
    get:
      operationId: listFeatureFlags
      summary: WunderGraph List feature flags
      description: Lists all feature flags in the organization for managing gradual rollout of graph changes.
      tags:
      - Feature Flags
      security:
      - apiKey: []
      parameters:
      - name: namespace
        in: query
        schema:
          type: string
        description: Filter by namespace name.
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  featureFlags:
                    type: array
                    items:
                      $ref: '#/components/schemas/FeatureFlag'
    post:
      operationId: createFeatureFlag
      summary: WunderGraph Create a feature flag
      description: Creates a new feature flag for enabling gradual rollout of feature subgraphs to federated graphs.
      tags:
      - Feature Flags
      security:
      - apiKey: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - name
              - featureSubgraphNames
              properties:
                name:
                  type: string
                  description: The name of the feature flag.
                namespace:
                  type: string
                  description: The namespace for the feature flag.
                featureSubgraphNames:
                  type: array
                  items:
                    type: string
                  description: List of feature subgraph names to associate with this flag.
                isEnabled:
                  type: boolean
                  description: Whether the feature flag is enabled.
                labels:
                  type: array
                  items:
                    type: object
                    properties:
                      key:
                        type: string
                      value:
                        type: string
                  description: Labels to match federated graphs.
      responses:
        '200':
          description: Feature flag created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OperationResponse'
components:
  schemas:
    FeatureFlag:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the feature flag.
        name:
          type: string
          description: The name of the feature flag.
        namespace:
          type: string
          description: The namespace the feature flag belongs to.
        isEnabled:
          type: boolean
          description: Whether the feature flag is currently enabled.
        featureSubgraphNames:
          type: array
          items:
            type: string
          description: Associated feature subgraph names.
        labels:
          type: array
          items:
            type: object
            properties:
              key:
                type: string
              value:
                type: string
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
    OperationResponse:
      type: object
      properties:
        success:
          type: boolean
          description: Whether the operation was successful.
        message:
          type: string
          description: A human-readable response message.
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: Authorization
      description: API key for authenticating with the Cosmo Platform API. Obtain via Cosmo Studio or wgc CLI. Set as COSMO_API_KEY environment variable.
x-authored-by: API Evangelist
x-modeled-from: documentation
x-provenance:
  method: modeled
  authored_by: API Evangelist
  modeled_from: https://cosmo-docs.wundergraph.com/
  provider_published: false
  note: Modeled by API Evangelist from WunderGraph's public Cosmo documentation. The provider does not publish a REST OpenAPI. The real control-plane interface is Connect-RPC, defined in WunderGraph's own platform.proto — see grpc/ for the verbatim first-party contract, which is authoritative where this document and the proto disagree.
  verified: '2026-08-03'
  evidence:
  - url: https://cosmo-cp.wundergraph.com/openapi.json
    status: 404
    note: no provider-published OpenAPI at the control-plane host
  - url: https://cosmo-cp.wundergraph.com/v1/analytics
    status: 404
    note: REST path modeled in this document does not resolve
  - url: https://cosmo-cp.wundergraph.com/wg.cosmo.platform.v1.PlatformService/GetFederatedGraphs
    status: 200
    method: POST
    note: the surface that does exist — Connect-RPC, not REST