> ## Documentation Index > Fetch the complete documentation index at: https://www.adaline.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Update Evaluator > Update evaluator configuration. ## OpenAPI ````yaml PATCH /prompts/{promptId}/evaluators/{evaluatorId} openapi: 3.1.1 info: title: Adaline API version: 2.0.0 description: >- Public API for managing Adaline projects, prompts, datasets, evaluators, evaluations, providers, models, and deployments. Generated from Zod schemas — this spec is the single source of truth. servers: - url: https://api.adaline.ai/v2 description: Production API security: [] tags: - name: datasets description: Manage prompt datasets and their columns and rows. - name: projects description: List and manage Adaline projects. - name: providers description: List configured LLM providers and their settings. - name: models description: List available models across providers. - name: prompts description: Create and manage prompts and their drafts. - name: evaluators description: Configure evaluators attached to a prompt. - name: evaluations description: Run and inspect evaluation results. - name: deployments description: Retrieve deployed prompt snapshots. - name: logs description: Ingest execution traces and spans for observability. paths: /prompts/{promptId}/evaluators/{evaluatorId}: patch: tags: - evaluators summary: Update an evaluator description: Update evaluator configuration. operationId: updateEvaluator parameters: - schema: $ref: '#/components/schemas/BaseEntityId' required: true name: promptId in: path - schema: $ref: '#/components/schemas/BaseEntityId' required: true name: evaluatorId in: path requestBody: content: application/json: schema: type: object properties: title: $ref: '#/components/schemas/EvaluatorTitle' datasetId: $ref: '#/components/schemas/BaseEntityId' config: $ref: '#/components/schemas/EvaluatorConfig' responses: '200': description: Evaluator updated. content: application/json: schema: $ref: '#/components/schemas/Evaluator' headers: X-Request-Id: description: >- Unique identifier for the request. Returned in every response. Send a custom value to correlate requests, or omit to receive a generated UUID. schema: type: string format: uuid '400': description: Bad request — validation error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized — invalid or missing API key. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '403': description: Forbidden — API key lacks access. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: Not found. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: BaseEntityId: title: Base Entity ID type: string description: Unique identifier for an entity, between 20 and 80 characters. minLength: 20 maxLength: 80 EvaluatorTitle: title: Evaluator Title type: string description: Display title for an evaluator, up to 200 characters. minLength: 1 maxLength: 200 EvaluatorConfig: title: Evaluator Config description: Evaluator configuration, discriminated by `type`. oneOf: - title: LLM as a Judge type: object required: - type - value properties: type: type: string enum: - llm-as-a-judge value: type: string description: The judge prompt or identifier. - title: Response Length type: object required: - type - value properties: type: type: string enum: - response-length value: $ref: '#/components/schemas/EvaluatorComparisonRule' - title: Latency type: object required: - type - value properties: type: type: string enum: - latency value: $ref: '#/components/schemas/EvaluatorComparisonRule' - title: Cost type: object required: - type - value properties: type: type: string enum: - cost value: $ref: '#/components/schemas/EvaluatorComparisonRule' - title: JavaScript type: object required: - type - value properties: type: type: string enum: - javascript value: type: string description: JavaScript code for the evaluator. - title: Text Matcher type: object required: - type - value properties: type: type: string enum: - text-matcher value: type: object required: - value - operator properties: value: oneOf: - type: string - type: array items: type: string description: Pattern or values to match against. operator: type: string enum: - regex - equals - starts-with - ends-with - contains-all - contains-any - not-contains-any discriminator: propertyName: type Evaluator: title: Evaluator type: object description: An evaluator configuration for running evaluations on datasets. properties: id: $ref: '#/components/schemas/BaseEntityId' promptId: $ref: '#/components/schemas/BaseEntityId' title: $ref: '#/components/schemas/EvaluatorTitle' datasetId: $ref: '#/components/schemas/BaseEntityId' config: $ref: '#/components/schemas/EvaluatorConfig' status: type: string description: Evaluator lifecycle status. enum: - active - archived createdAt: $ref: '#/components/schemas/UnixTimestamp' updatedAt: $ref: '#/components/schemas/UnixTimestamp' required: - id - promptId - title - datasetId - config - status - createdAt - updatedAt ErrorResponse: title: Error Response type: object description: >- Standard error response envelope. Permits backend-specific sibling fields (e.g. Zod issue details) alongside the typed `error`. properties: error: description: >- Error details — typed envelope, or a raw string reason when the backend's validator produces a short summary (e.g. Zod validation fallback). oneOf: - type: string - type: object properties: code: type: string description: Machine-readable error code. enum: - VALIDATION_ERROR - INVALID_CURSOR - AUTHENTICATION_REQUIRED - FORBIDDEN - RESOURCE_NOT_FOUND - CONFLICT - PAYLOAD_TOO_LARGE - RATE_LIMITED - INTERNAL_ERROR message: type: string description: Human-readable error message. details: type: array description: Optional field-level validation details. items: type: object properties: field: type: string issue: type: string required: - field - issue required: - code - message additionalProperties: true required: - error additionalProperties: true EvaluatorComparisonRule: title: Evaluator Comparison Rule description: >- A threshold comparison rule used by evaluator types (latency, cost, response-length). The `value` field holds the numeric/expression threshold, `unit` is type-specific (e.g. ms, s, USD, words, characters, tokens), and `operator` determines the comparison direction. type: object required: - value - unit - operator properties: value: oneOf: - type: number - type: string unit: type: string operator: type: string enum: - less - greater - equals UnixTimestamp: title: Unix Timestamp type: integer format: int64 description: Unix timestamp in milliseconds. minimum: 1672511400000 maximum: 33229420200000 securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: API Key description: 'Workspace API key. Pass as `Authorization: Bearer `.' ````