> ## Documentation Index > Fetch the complete documentation index at: https://docs.moonbounce.ai/llms.txt > Use this file to discover all available pages before exploring further. # List registered structures > Reads only. Lists a decision's registered structures, newest first, without spec bodies; getStructure returns the spec. The decision must have a binding in the key's environment. Its structure registry is shared across the organization's environments. Pass next_cursor as cursor while has_more is true. ## OpenAPI ````yaml /openapi.json get /v1/decisions/{decision_id}/structures openapi: 3.1.0 info: title: Moonbounce Decisions API version: 0.0.0 description: >- Moonbounce decisions: evaluate items against a decision spec (features combined by aggregators), record feedback and seed examples, review a ranked queue, and improve the spec through suggestions that ship as code diffs, each with a preview (backtest) and an evidence label. **Authentication.** Send an API key as `Authorization: Bearer ` on every operation except `GET /health` and `POST /v1/specs/hash`. Call the API from a server, never a browser: a key must not reach one, and the API sends no CORS headers. A key belongs to one organization and one environment: production, or test for a key with the `env:test` permission. Test traffic never counts as production traffic. **Requests.** JSON bodies (`Content-Type: application/json`) of at most 1 MB, parsed strictly: duplicate keys, lone surrogates, integers outside ±(2^53 - 1), `__proto__` keys, U+0000 and nesting deeper than 64 are a 400. **Retries.** Send an `Idempotency-Key` on every POST under /v1 that takes one (all but `POST /v1/specs/hash`). Keep it for the request's retries. The same key with the same request returns the first stored result, marked `Idempotent-Replayed: true`, for 24 hours (410 if that result was since deleted); with another request it is 422 IDEMPOTENCY_KEY_REUSED. Keys are scoped to the organization and environment across every operation, so use a fresh key per request. A request that failed before its result was stored runs again when retried. 429 and 503 under /v1 may carry `Retry-After` (seconds); a daily QUOTA_EXCEEDED cap instead names its reset time. **Errors.** Every error under /v1 is `{"error": {"type", "message", "reason"?, "param"?, "details"?}}` (ErrorBody); `GET /health` answers its own shape. Every response carries a `Request-Id` header. Rate limits apply per key and per client IP, counted per Cloudflare location. servers: - url: https://api.moonbounce.ai description: Production security: [] paths: /v1/decisions/{decision_id}/structures: get: tags: - specs summary: List registered structures description: >- Reads only. Lists a decision's registered structures, newest first, without spec bodies; getStructure returns the spec. The decision must have a binding in the key's environment. Its structure registry is shared across the organization's environments. Pass next_cursor as cursor while has_more is true. operationId: listStructures parameters: - schema: $ref: '#/components/schemas/DecisionId' required: true name: decision_id in: path - schema: type: integer minimum: 1 maximum: 100 default: 50 required: false name: limit in: query - schema: type: string minLength: 1 maxLength: 1024 description: The previous page's next_cursor. required: false description: The previous page's next_cursor. name: cursor in: query responses: '200': description: A structure page content: application/json: schema: $ref: '#/components/schemas/StructurePage' '400': description: 'Invalid request: `param` names the field at fault when one applies' content: application/json: schema: $ref: '#/components/schemas/ErrorBody' '401': description: Missing or invalid API key (reason KEY_INVALID) content: application/json: schema: $ref: '#/components/schemas/ErrorBody' '403': description: The key may not do this content: application/json: schema: $ref: '#/components/schemas/ErrorBody' '429': description: >- RATE_LIMITED: retry after Retry-After seconds; QUOTA_EXCEEDED: details.reset_at gives the daily reset time (no Retry-After), or details.too_large asks for a smaller request headers: Retry-After: schema: type: string description: Seconds to wait before retrying, when waiting helps. required: false description: Seconds to wait before retrying, when waiting helps. content: application/json: schema: $ref: '#/components/schemas/ErrorBody' '503': description: >- Temporarily unavailable, with Retry-After (for example reason AUTH_UNAVAILABLE, ENGINE_UNAVAILABLE or STORE_UNAVAILABLE): retry with the same Idempotency-Key headers: Retry-After: schema: type: string description: Seconds to wait before retrying, when waiting helps. required: true description: Seconds to wait before retrying, when waiting helps. content: application/json: schema: $ref: '#/components/schemas/ErrorBody' security: - bearerAuth: - decisions:evaluate - bearerAuth: - decisions:develop components: schemas: DecisionId: type: string pattern: ^[a-z][a-z0-9_.-]{0,127}$ StructurePage: type: object properties: environment: $ref: '#/components/schemas/Environment' next_cursor: type: - string - 'null' has_more: type: boolean items: type: array items: type: object properties: structure: $ref: '#/components/schemas/VersionHash' nodes: type: object additionalProperties: $ref: '#/components/schemas/VersionHash' default_weights: $ref: '#/components/schemas/VersionHash' created_at: type: string format: date-time meta: $ref: '#/components/schemas/Meta' required: - structure - nodes - default_weights - created_at required: - environment - next_cursor - has_more - items ErrorBody: type: object properties: error: type: object properties: type: $ref: '#/components/schemas/ErrorType' reason: type: string pattern: ^[A-Z][A-Z0-9_]+$ description: >- Set where a caller can act on it, one of the reasons in the ErrorReason schema. New reasons may be added: treat an unknown one by the status and `type`. message: type: string description: For people; don't parse it. param: type: string description: >- The request field at fault, as a dotted path (`subject.0.text`, `claims.1.value`). details: type: object additionalProperties: {} required: - type - message additionalProperties: false required: - error additionalProperties: false Environment: type: string enum: - production - test description: >- The environment of the key that made the call: `production` or `test`. Evaluations, feedback, reviews and suggestions are separate per environment; registered structures are shared. VersionHash: type: string pattern: ^sha256:[0-9a-f]{64}$ Meta: type: object properties: title: type: string maxLength: 200 description: type: string maxLength: 4000 owner: type: string maxLength: 200 tags: type: array items: type: string maxLength: 64 maxItems: 32 display: type: object additionalProperties: type: object properties: text: type: string minLength: 1 maxLength: 40 help: type: string maxLength: 200 required: - text additionalProperties: false additionalProperties: false ErrorType: type: string enum: - invalid_request - authentication - permission_denied - not_found - conflict - rate_limited - engine_failed - unavailable - internal securitySchemes: bearerAuth: type: http scheme: bearer description: >- An API key, sent as `Authorization: Bearer `. Each operation lists the scope its key needs: `decisions:evaluate` (evaluate and read evaluations), `decisions:feedback` (your app's feedback) or `decisions:develop` (everything else, including owner feedback and the review queue). An operation listing no scope takes any scoped key. A key with no scope, or without the operation's, gets 403 INSUFFICIENT_SCOPE. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.