> ## Documentation Index > Fetch the complete documentation index at: https://www.usenotra.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # List the answer engines a project can track > Returns every engine id this organization can select in `engines` when updating GEO settings. This includes model APIs and consumer surfaces scanned through hosted browsers, such as `google/ai-overview` (Google AI Overview), `google/gemini` (the Gemini app) and `openai/chatgpt` (the ChatGPT app). Legacy engines that a project already tracks stay accepted but are not listed. ## OpenAPI ````yaml https://api.usenotra.com/openapi.json get /v1/projects/{projectId}/geo/engines openapi: 3.1.1 info: title: Notra API version: 1.0.0 description: >- OpenAPI schema for Notra content endpoints. Use GET /v1/status for public reachability. Error responses include recovery guidance. Breaking changes ship under a new major path; deprecated operations send Deprecation and Sunset headers at least 90 days before removal. servers: - url: https://api.usenotra.com description: Production - url: https://demo-api.usenotra.com description: >- Sandbox with sample data. Get a free sandbox key at demo.usenotra.com, no signup needed security: - BearerAuth: [] tags: - name: Webhooks description: Manage outbound webhook subscriptions and delivery history. - name: Discovery description: Public API status and authenticated workspace discovery. - name: Content description: >- Manage posts, brand identities, and GitHub or Linear integrations, and queue content generation. Organization is inferred from the API key (identity.externalId). - name: Schedules description: >- Manage scheduled content generation. Organization is inferred from the API key (identity.externalId). - name: Event Triggers description: >- Manage event-based content generation triggered by GitHub webhooks. Organization is inferred from the API key (identity.externalId). - name: Chats description: >- Manage chat sessions. Organization is inferred from the API key (identity.externalId). - name: Skills description: >- Manage reusable writing skills. Organization is inferred from the API key (identity.externalId). - name: Feedback description: >- Collect and triage feedback submitted by AI agents. Agents post to the organization's feedback URL without credentials; reading and triage require an API key with feedback.read or feedback.write. - name: GEO description: >- Manage generative engine optimization: projects, tracking settings, prompts, prompt sequences, competitors, scans, visibility reads, content gaps and briefs, agent readiness and AI traffic. Project-scoped endpoints require the GEO plan entitlement in addition to their scope; organization-level ingest endpoints require only the traffic scope. externalDocs: description: Notra API versioning and deprecation policy url: https://www.usenotra.com/docs/api/versioning paths: /v1/projects/{projectId}/geo/engines: get: tags: - GEO summary: List the answer engines a project can track description: >- Returns every engine id this organization can select in `engines` when updating GEO settings. This includes model APIs and consumer surfaces scanned through hosted browsers, such as `google/ai-overview` (Google AI Overview), `google/gemini` (the Gemini app) and `openai/chatgpt` (the ChatGPT app). Legacy engines that a project already tracks stay accepted but are not listed. operationId: listGeoEngines parameters: - schema: type: string minLength: 1 pattern: ^[A-Za-z0-9_-]{1,100}$ example: b1f2c3d4-0000-4000-8000-000000000000 required: true name: projectId in: path responses: '200': description: Engines fetched successfully content: application/json: schema: $ref: '#/components/schemas/GeoEngineListResponse' '400': description: Invalid request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Missing or invalid API key content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '402': description: GEO plan or available AI credits required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '403': description: Forbidden content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: Organization, project or resource not found content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '409': description: Conflict content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '503': description: Authentication or billing service unavailable content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' components: schemas: GeoEngineListResponse: type: object properties: engines: type: array items: $ref: '#/components/schemas/GeoEngine' organization: type: object properties: id: type: string slug: type: string name: type: string logo: type: - string - 'null' required: - id - slug - name - logo required: - engines - organization ErrorResponse: type: object properties: error: type: string code: type: string recovery: type: string required: - error GeoEngine: type: object properties: id: type: string description: Engine id to pass in the `engines` setting. example: google/ai-overview label: type: string provider: type: string zdr: type: string enum: - all - some - none description: >- Zero data retention coverage. Engines with `none` need `enforceZdr: false` or an entry in `nonZdrApprovedEngines`. default: type: boolean description: Part of the default engine set for new projects. supportsGroundedChecks: type: boolean required: - id - label - provider - zdr - default - supportsGroundedChecks securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: API Key description: >- Send your API key in the Authorization header as Bearer API_KEY. Account API keys work in every workspace you belong to: send X-Notra-Organization-Id with the workspace id or slug to choose one. Workspace endpoints require it when you belong to more than one workspace; GET /v1/me/workspaces works without it. Organization keys only accept their own workspace there. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.