> ## 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. # Get a past evaluation > Reads only. Returns an evaluation of this organization and the key's environment, including assignment_mode and the submitted subject when stored. Subject is absent when content was not stored (store_content: false); another environment's evaluation is 404, so a test key never reads production traffic. The web app (WebApi) may not read evaluations (403): a blind spot-check card carries the id. ## OpenAPI ````yaml /openapi.json get /v1/evaluations/{evaluation_id} 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/evaluations/{evaluation_id}: get: tags: - evaluate summary: Get a past evaluation description: >- Reads only. Returns an evaluation of this organization and the key's environment, including assignment_mode and the submitted subject when stored. Subject is absent when content was not stored (store_content: false); another environment's evaluation is 404, so a test key never reads production traffic. The web app (WebApi) may not read evaluations (403): a blind spot-check card carries the id. operationId: getEvaluation parameters: - schema: $ref: '#/components/schemas/EvlId' required: true name: evaluation_id in: path responses: '200': description: The evaluation content: application/json: schema: $ref: '#/components/schemas/EvaluationResponse' '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' '404': description: Not found, or not in this key's organization and environment 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: $ref: '#/components/schemas/ErrorBody' security: - bearerAuth: - decisions:evaluate components: schemas: EvlId: type: string pattern: >- ^evl_[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$ EvaluationResponse: type: object properties: environment: $ref: '#/components/schemas/Environment' id: $ref: '#/components/schemas/EvlId' decision_id: $ref: '#/components/schemas/DecisionId' version: type: object properties: structure: $ref: '#/components/schemas/VersionHash' weights: $ref: '#/components/schemas/VersionHash' weights_source: type: string enum: - pinned - default - live - carried description: >- Where the weights came from. v1 returns "pinned" or "default"; "live" and "carried" are reserved. Tolerate values added later. weights_fitted: type: boolean binding: type: integer minimum: 1 engine_profile: type: string required: - structure - weights - weights_source - weights_fitted - binding - engine_profile additionalProperties: false status: $ref: '#/components/schemas/EvaluateStatus' score: type: number outcome: $ref: '#/components/schemas/Name' nodes: type: object additionalProperties: $ref: '#/components/schemas/NodeValue' description: >- The value of each of the spec's named nodes, features and aggregators alike, keyed by node name. Every value carries its `type`; a node with an answer has `value`, one without has `abstained` or `failed`. engines: type: object additionalProperties: $ref: '#/components/schemas/EngineUse' outcomes: $ref: '#/components/schemas/Outcomes' usage: $ref: '#/components/schemas/Usage' cost: type: object properties: engine_calls: type: integer minimum: 0 description: >- On evaluate and seeds, upstream engine calls reported in usage, including retries; one call can answer several features (Jev compiles them). On previews, features sent to engines, not upstream calls. cache_hits: type: integer minimum: 0 description: >- Feature answers reused from cache. Only previews use the cache today; evaluate and seeds report 0. input_tokens: type: integer minimum: 0 usd_micros: type: integer minimum: 0 required: - engine_calls - cache_hits - input_tokens - usd_micros additionalProperties: false description: absent if no spend was recorded for this evaluation item_id: type: string summary: type: string metadata: $ref: '#/components/schemas/Metadata' warnings: type: array items: $ref: '#/components/schemas/Warning' assignment_mode: $ref: '#/components/schemas/AssignmentMode' subject: type: array items: $ref: '#/components/schemas/ContentPart' description: >- The subject as submitted. Absent when content was not stored (store_content: false). required: - environment - id - decision_id - version - status - nodes - engines - usage - item_id - assignment_mode additionalProperties: false 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. DecisionId: type: string pattern: ^[a-z][a-z0-9_.-]{0,127}$ VersionHash: type: string pattern: ^sha256:[0-9a-f]{64}$ EvaluateStatus: type: string enum: - scored - no_outcomes - abstained Name: type: string pattern: ^[a-z][a-z0-9_]{0,63}$ NodeValue: anyOf: - $ref: '#/components/schemas/Abstained' - $ref: '#/components/schemas/Failed' - type: object properties: type: type: string enum: - boolean value: type: number minimum: 0 maximum: 1 required: - type - value additionalProperties: false - type: object properties: type: type: string enum: - combine value: type: number contributions: type: object additionalProperties: type: number required: - type - value - contributions additionalProperties: false - type: object properties: type: type: string enum: - calibrate value: type: number minimum: 0 maximum: 1 calibrated: type: boolean required: - type - value - calibrated additionalProperties: false EngineUse: type: object properties: engine: type: string model: type: string resolved_model: type: string adapter: type: string cached: type: boolean required: - engine - model - resolved_model - adapter - cached additionalProperties: false Outcomes: type: object properties: below: type: string pattern: ^[a-z][a-z0-9_]{0,63}$ description: The outcome for a score under the first cut. cuts: type: array items: type: object properties: at: type: number outcome: $ref: '#/components/schemas/Name' required: - at - outcome additionalProperties: false minItems: 1 maxItems: 9 abstain: $ref: '#/components/schemas/Name' required: - below - cuts additionalProperties: false Usage: type: object properties: input_tokens: type: integer output_tokens: type: integer required: - input_tokens - output_tokens additionalProperties: false Metadata: type: object additionalProperties: anyOf: - type: string maxLength: 512 - type: number - type: boolean - type: 'null' description: >- Caller key-values, stored with the evaluation and never shown to the model. Keys starting `mb.` are reserved for Moonbounce provenance: `mb.commit`, `mb.branch`, `mb.service` and `mb.release`, which say where a call came from. Warning: type: object properties: code: type: string message: type: string param: type: string required: - code - message additionalProperties: false AssignmentMode: type: string enum: - primary - shadow - backtest - seed ContentPart: oneOf: - $ref: '#/components/schemas/TextPart' - $ref: '#/components/schemas/JsonPart' discriminator: propertyName: type mapping: text: '#/components/schemas/TextPart' json: '#/components/schemas/JsonPart' ErrorType: type: string enum: - invalid_request - authentication - permission_denied - not_found - conflict - rate_limited - engine_failed - unavailable - internal Abstained: type: object properties: type: type: string enum: - boolean - combine - calibrate abstained: type: boolean enum: - true reason: type: string required: - type - abstained additionalProperties: false Failed: type: object properties: type: type: string enum: - boolean - combine - calibrate failed: type: boolean enum: - true reason: type: string required: - type - failed additionalProperties: false TextPart: type: object properties: type: type: string enum: - text text: type: string minLength: 1 name: type: string pattern: ^[a-z][a-z0-9_]{0,63}$ description: >- Names the part, so a feature's `inputs` can pick it. In `subject`, avoid "context" when the request also sends `context`. sensitive: type: boolean description: >- Display policy only: reviewers see the part blurred or behind a link. The engine still reads it and it is stored like any other part. required: - type - text additionalProperties: false JsonPart: type: object properties: type: type: string enum: - json data: anyOf: - type: object additionalProperties: {} - type: array items: {} name: type: string pattern: ^[a-z][a-z0-9_]{0,63}$ description: >- Names the part, so a feature's `inputs` can pick it. In `subject`, avoid "context" when the request also sends `context`. sensitive: type: boolean description: >- Display policy only: reviewers see the part blurred or behind a link. The engine still reads it and it is stored like any other part. required: - type - data additionalProperties: false 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.