> ## Documentation Index > Fetch the complete documentation index at: https://docs.usenexio.com/llms.txt > Use this file to discover all available pages before exploring further. # List Engines > List all engines in your organization, including slug, kind, and status. ## OpenAPI ````yaml GET /api/v1/engines openapi: 3.1.0 info: title: Nexio API version: '1.0' description: | Nexio agentic infrastructure API. Configure engines for placement, entity analysis, and other patterns. Submit runs, poll for results, or subscribe to signed webhook callbacks. contact: email: support@usenexio.com url: https://docs.usenexio.com servers: - url: https://api.usenexio.com description: Production security: - BearerAuth: [] tags: - name: EngineManagement description: Create, configure, and manage inference engines. - name: Engines description: Engine-scoped endpoints for submitting runs and retrieving results. - name: Runs description: Retrieve and reconcile submitted runs. - name: Catalog description: >- Read current carriers and products extracted for the authenticated organization. - name: Environments description: Isolated tenancy scopes under your org (one live plus non-live sandboxes). - name: Webhooks description: Manage webhook endpoints for push-based delivery of terminal run events. paths: /api/v1/engines: get: tags: - EngineManagement summary: List Engines description: | Returns all engines for the authenticated organization. Engine metadata only: configs are not included. Use [Get Engine Config](/api-reference/engines/get-engine-config) to retrieve the full configuration for a specific engine. operationId: listEngines responses: '200': description: List of engines. content: application/json: schema: $ref: '#/components/schemas/EngineListResponse' example: engines: - id: 550e8400-e29b-41d4-a716-446655440000 slug: my-engine label: Product Comparison Engine description: Rank offerings from multiple providers. engine_type: placement status: active created_at: '2026-04-01T10:00:00Z' updated_at: '2026-04-01T10:00:00Z' - id: 660e8400-e29b-41d4-a716-446655440001 slug: gap-analysis label: Requirements Gap Analysis description: Evaluate current state against requirements and find gaps. engine_type: entity_analysis status: active created_at: '2026-04-02T14:30:00Z' updated_at: '2026-04-03T09:15:00Z' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/RateLimited' components: schemas: EngineListResponse: type: object required: - engines properties: engines: type: array items: $ref: '#/components/schemas/EngineMetadata' EngineMetadata: type: object required: - id - slug - label - description - engine_type - status - created_at - updated_at description: Engine metadata returned by management endpoints. properties: id: type: string description: Engine identifier. slug: type: string description: URL-safe engine slug, unique within the organization. label: type: string description: Human-readable engine name. description: type: string description: Optional engine description. engine_type: type: string enum: - placement - entity_analysis - diligence description: > Engine type. `placement` engines rank provider offerings into optimal solutions. `entity_analysis` engines evaluate current state against requirements and find gaps. `diligence` engines verify a claimed event (location, date, what happened) and return a sourced verdict with an evidence chain. status: type: string enum: - active - archived description: Engine status. Archived engines cannot have their config updated. created_at: type: string format: date-time description: RFC 3339 creation timestamp. updated_at: type: string format: date-time description: RFC 3339 last-update timestamp. Error: type: object required: - code - message properties: code: type: string description: | Stable snake_case error identifier. Safe to match programmatically. Known codes: `invalid_request`, `invalid_input`, `unauthorized`, `auth_unavailable`, `rate_limited`, `missing_run_id`, `invalid_run_id`, `run_not_found`, `invalid_offerings`, `missing_input`, `queue_unreachable`, `engine_not_found`, `engine_slug_conflict`, `engine_archived`, `invalid_engine_type`, `validation_error`, `webhook_not_found`, `webhook_limit_exceeded`, `invalid_url`, `invalid_events`, `invalid_description`, `invalid_auth_token`, `missing_endpoint_id`, `invalid_endpoint_id`, `missing_delivery_id`, `invalid_delivery_id`, `delivery_not_found`, `delivery_not_resendable`, `insufficient_capability`, `engine_version_required`, `engine_version_exact_required`, `engine_version_not_found`, `engine_version_invalid_format`, `engine_version_draft_requires_sandbox_key`, `engine_version_none_released`, `test_scenario_sandbox_only`, `test_scenario_forbidden`, `test_scenario_exact_version_required`, `test_scenario_version_not_supported`, `invalid_test_scenario`, `request_bound_exceeded`, and `run_cap_exceeded`. message: type: string description: Human-readable error message. May change between versions. details: description: | Optional request-specific details. Request-bound failures use the `RequestBoundDetails` object. Validation failures may use an array of field issues or another documented object. responses: Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/Error' example: code: unauthorized message: Missing or invalid API key RateLimited: description: Rate limit exceeded. Retry after the window resets. headers: Retry-After: description: Seconds until the rate limit window resets. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/Error' example: code: rate_limited message: Rate limit exceeded securitySchemes: BearerAuth: type: http scheme: bearer description: | Send the credential as `Authorization: Bearer `. Scoped partner credentials use the exclusive `nxsk_v1_...` namespace. Each scoped key is bound at issuance to one organization, one canonical named environment, an explicit engine set, and a least-privilege capability set. A malformed, unknown, rotated, or revoked `nxsk_` key fails closed and is never retried as a legacy key. Capabilities used by this API are `runs:write`, `runs:read`, `engines:read`, `catalog:read`, `webhooks:manage`, `runs:defensibility:read`, `runs:test`, and `converse:use`. Operation descriptions name the required capability. Grandfathered `nx_live_...` and `nx_test_...` keys retain their existing broad access during the compatibility window. ````