> ## 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. # Hash a decision structure > Returns the structure hash and every question's hash, without registering it or touching data. Public: needs no API key. Key order, Unicode normalization (NFC) of instructions, criteria and attribute sources, the order of `reads` and of aggregation `inputs`, and defaults spelled out (`invert: false`, `gte: 0.5`, empty `criteria`) do not change the hashes. Read paths, string attribute labels and label comparisons stay exact, since customer content is not normalized. ## OpenAPI ````yaml /openapi.json post /v1/structures/hash openapi: 3.1.0 info: title: Moonbounce Decisions API version: 0.0.0 description: >- Moonbounce decisions: evaluate an item's state against a decision structure (System One questions, attributes you supply and aggregations over both), record feedback and seed examples, review a ranked queue, and improve the structure 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/structures/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/structures/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 for requests without a valid key; a 429 RATE_LIMITED carries `Retry-After`. servers: - url: https://api.moonbounce.ai description: Production security: [] paths: /v1/structures/hash: post: tags: - structures summary: Hash a decision structure description: >- Returns the structure hash and every question's hash, without registering it or touching data. Public: needs no API key. Key order, Unicode normalization (NFC) of instructions, criteria and attribute sources, the order of `reads` and of aggregation `inputs`, and defaults spelled out (`invert: false`, `gte: 0.5`, empty `criteria`) do not change the hashes. Read paths, string attribute labels and label comparisons stay exact, since customer content is not normalized. operationId: hashStructure requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/DecisionStructure' responses: '200': description: The structure's hashes content: application/json: schema: $ref: '#/components/schemas/StructureHashResponse' '400': description: 'Invalid request: `param` names the field at fault when one applies' content: application/json: schema: $ref: '#/components/schemas/ErrorBody' '413': description: The HTTP body exceeds 1 MB (reason BODY_TOO_LARGE) 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) 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' security: [] components: schemas: DecisionStructure: type: object properties: questions: type: object additionalProperties: $ref: '#/components/schemas/Question' description: System One questions, keyed by name. attributes: type: object additionalProperties: $ref: '#/components/schemas/Attribute' description: >- Values your app supplies with each call in `attribute_values`. The model never sees them. aggregations: type: object additionalProperties: $ref: '#/components/schemas/Aggregation' result: type: string minLength: 1 maxLength: 80 description: The final feature's path, such as `aggregations.band`. examples: - questions.asks_for_refund - aggregations.band required: - questions - result additionalProperties: false description: >- Everything that defines a decision: questions, attribute declarations, aggregations and the result. Names are unique across all three maps. StructureHashResponse: type: object properties: structure_hash: $ref: '#/components/schemas/StructureHashOutput' question_hashes: type: object additionalProperties: $ref: '#/components/schemas/QuestionHash' description: >- Each question, by name, mapped to its hash (its definition without its name). A question's hash is what feedback about it is stored against. required: - structure_hash - question_hashes additionalProperties: true x-moonbounce-sdk-known-fields: true 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 (`attribute_values.region`, `claims.1.value`). details: type: object properties: issues: type: array items: $ref: '#/components/schemas/ErrorIssue' additionalProperties: {} required: - type - message additionalProperties: true x-moonbounce-sdk-known-fields: true required: - error additionalProperties: true x-moonbounce-sdk-known-fields: true Question: oneOf: - $ref: '#/components/schemas/NoulQuestion' discriminator: propertyName: type mapping: noul: '#/components/schemas/NoulQuestion' Attribute: oneOf: - $ref: '#/components/schemas/StringAttribute' - $ref: '#/components/schemas/NumberAttribute' - $ref: '#/components/schemas/BooleanAttribute' discriminator: propertyName: type mapping: string: '#/components/schemas/StringAttribute' number: '#/components/schemas/NumberAttribute' boolean: '#/components/schemas/BooleanAttribute' Aggregation: oneOf: - $ref: '#/components/schemas/WeightedMean' - $ref: '#/components/schemas/Logistic' - $ref: '#/components/schemas/Min' - $ref: '#/components/schemas/Max' - $ref: '#/components/schemas/Product' - $ref: '#/components/schemas/NoisyOr' - $ref: '#/components/schemas/All' - $ref: '#/components/schemas/Any' - $ref: '#/components/schemas/Bands' - $ref: '#/components/schemas/Rules' - $ref: '#/components/schemas/Match' discriminator: propertyName: type mapping: weighted_mean: '#/components/schemas/WeightedMean' logistic: '#/components/schemas/Logistic' min: '#/components/schemas/Min' max: '#/components/schemas/Max' product: '#/components/schemas/Product' noisy_or: '#/components/schemas/NoisyOr' all: '#/components/schemas/All' any: '#/components/schemas/Any' bands: '#/components/schemas/Bands' rules: '#/components/schemas/Rules' match: '#/components/schemas/Match' StructureHashOutput: type: string pattern: ^sha256:[0-9a-f]{64}$ QuestionHash: type: string pattern: ^sha256:[0-9a-f]{64}$ ErrorType: type: string enum: - invalid_request - authentication - permission_denied - not_found - conflict - rate_limited - engine_failed - unavailable - internal ErrorIssue: type: object properties: param: type: string code: type: string pattern: ^[A-Z][A-Z0-9_]+$ description: >- Stable, extensible issue code; unknown codes still have a parameter and human-readable message. message: type: string required: - param - code - message additionalProperties: true x-moonbounce-sdk-known-fields: true NoulQuestion: type: object properties: type: type: string enum: - noul instructions: $ref: '#/components/schemas/Instructions' criteria: type: object properties: 'true': type: string minLength: 1 maxLength: 4000 'false': type: string minLength: 1 maxLength: 4000 additionalProperties: false reads: type: array items: $ref: '#/components/schemas/StatePath' minItems: 1 maxItems: 64 description: >- Paths into an object `state` this question reads, such as `state.message` or `state.order.customer.tier`. The question sees just those values, nested as in the state. Without it the question sees the whole state, as in System One. Every path must exist in the call's `state`; no entry may repeat or contain another. required: - type - instructions additionalProperties: false description: P(true) for a statement about the state. StringAttribute: type: object properties: type: type: string enum: - string enum: type: array items: type: string minLength: 1 maxLength: 200 minItems: 1 maxItems: 255 default: type: string source: type: string minLength: 1 maxLength: 200 description: >- The model and version behind this attribute, such as `toxicity-classifier-v3`. Hashed. required: - type - enum additionalProperties: false NumberAttribute: type: object properties: type: type: string enum: - number minimum: type: number maximum: type: number default: type: number source: type: string minLength: 1 maxLength: 200 description: >- The model and version behind this attribute, such as `toxicity-classifier-v3`. Hashed. required: - type additionalProperties: false BooleanAttribute: type: object properties: type: type: string enum: - boolean default: type: boolean source: type: string minLength: 1 maxLength: 200 description: >- The model and version behind this attribute, such as `toxicity-classifier-v3`. Hashed. required: - type additionalProperties: false WeightedMean: type: object properties: type: type: string enum: - weighted_mean inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' weight: type: number exclusiveMinimum: 0 invert: type: boolean required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 'Σ wᵢ·xᵢ / Σ wᵢ: a weighted average from 0 to 1, not a probability.' Logistic: type: object properties: type: type: string enum: - logistic bias: type: number inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' weight: type: number required: - name - weight additionalProperties: false minItems: 1 maxItems: 64 required: - type - bias - inputs additionalProperties: false description: σ(bias + Σ wᵢ·xᵢ), with signed weights on raw input values. Min: type: object properties: type: type: string enum: - min inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' invert: type: boolean required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 'min xᵢ: all of these, when they overlap.' Max: type: object properties: type: type: string enum: - max inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' invert: type: boolean required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 'max xᵢ: any of these, when they overlap.' Product: type: object properties: type: type: string enum: - product inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' invert: type: boolean required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 'Π xᵢ: all of these, when they are independent.' NoisyOr: type: object properties: type: type: string enum: - noisy_or inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' invert: type: boolean required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: '1 − Π(1 − xᵢ): any of these, when they are independent.' All: type: object properties: type: type: string enum: - all inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' gte: type: number gt: type: number lte: type: number lt: type: number required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 1 when every input passes its threshold (default ≥ 0.5), else 0. Any: type: object properties: type: type: string enum: - any inputs: type: array items: type: object properties: name: $ref: '#/components/schemas/FeatureRef' gte: type: number gt: type: number lte: type: number lt: type: number required: - name additionalProperties: false minItems: 1 maxItems: 64 required: - type - inputs additionalProperties: false description: 1 when any input passes its threshold (default ≥ 0.5), else 0. Bands: type: object properties: type: type: string enum: - bands input: $ref: '#/components/schemas/FeatureRef' below: $ref: '#/components/schemas/Name' 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: - type - input - below - cuts additionalProperties: false description: >- Names an outcome for each range of one feature's value. `at` means ≥; `below` is under the first cut. Rules: type: object properties: type: type: string enum: - rules rules: type: array items: type: object properties: when: $ref: '#/components/schemas/Condition' outcome: $ref: '#/components/schemas/Name' required: - when - outcome additionalProperties: false minItems: 1 maxItems: 64 else: $ref: '#/components/schemas/Name' required: - type - rules - else additionalProperties: false description: >- The first rule whose condition is true names its `outcome`; otherwise `else`. Match: type: object properties: type: type: string enum: - match input: $ref: '#/components/schemas/FeatureRef' cases: type: object additionalProperties: $ref: '#/components/schemas/Name' description: >- Maps labels to outcomes. "__proto__" is not supported as a case key; use a rules is-condition for that label. else: $ref: '#/components/schemas/Name' abstain: $ref: '#/components/schemas/Name' required: - type - input - cases additionalProperties: false description: Maps a label straight to an outcome. Instructions: anyOf: - type: string minLength: 1 maxLength: 4000 - type: object additionalProperties: {} - type: array items: {} minItems: 1 StatePath: type: string minLength: 1 maxLength: 256 description: >- `state.` or a nested object path such as `state.order.customer.tier`: keys of an object `state`. A key has no `.`, `[` or `]`. Array indexes are not supported yet. examples: - state.message - state.order.order_total_usd FeatureRef: type: string minLength: 1 maxLength: 80 description: >- A feature's path: `questions.`, `attributes.` or `aggregations.`. examples: - questions.asks_for_refund - aggregations.band Name: type: string pattern: ^[a-z][a-z0-9_]{0,63}$ Condition: anyOf: - type: object properties: name: $ref: '#/components/schemas/FeatureRef' gte: type: number gt: type: number lte: type: number lt: type: number is: type: string minLength: 1 maxLength: 200 in: type: array items: type: string minLength: 1 maxLength: 200 minItems: 1 maxItems: 255 abstained: type: boolean enum: - true required: - name additionalProperties: false - type: object properties: all: type: array items: $ref: '#/components/schemas/Condition' minItems: 1 maxItems: 64 required: - all additionalProperties: false - type: object properties: any: type: array items: $ref: '#/components/schemas/Condition' minItems: 1 maxItems: 64 required: - any additionalProperties: false - type: object properties: not: $ref: '#/components/schemas/Condition' required: - not additionalProperties: false ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.