> ## Documentation Index
> Fetch the complete documentation index at: https://doc.featherhq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create an evaluator



## OpenAPI

````yaml /api-reference/openapi.json post /v1/evaluators
openapi: 3.1.0
info:
  title: Feather API
  description: >-
    Unified customer experience platform API. Manages identity, conversations,
    memory, agents, procedures, policies, model routing, knowledge bases,
    integrations, and runtime execution.
  version: 1.21.0
servers:
  - url: https://api-sandbox.featherhq.com
    description: Sandbox
  - url: http://localhost:8000
    description: Local dev
security: []
paths:
  /v1/evaluators:
    post:
      tags:
        - evals
        - evals
      summary: Create an evaluator
      operationId: createEvaluator
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EvaluatorCreate'
      responses:
        '201':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/EvaluatorResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Authentication required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
        - APIKeyHeader: []
components:
  schemas:
    EvaluatorCreate:
      properties:
        name:
          type: string
          maxLength: 200
          title: Name
        description:
          anyOf:
            - type: string
              maxLength: 4096
            - type: 'null'
          title: Description
        owner:
          anyOf:
            - type: string
              maxLength: 200
            - type: 'null'
          title: Owner
        status:
          type: string
          enum:
            - active
            - inactive
            - archived
          title: Status
          default: active
        config:
          additionalProperties: true
          type: object
          title: Config
        prompt:
          anyOf:
            - type: string
              maxLength: 16384
            - type: 'null'
          title: Prompt
        threshold:
          anyOf:
            - type: number
            - type: 'null'
          title: Threshold
        severity:
          type: string
          enum:
            - info
            - low
            - medium
            - high
            - critical
          title: Severity
          default: medium
        judge_model_override:
          anyOf:
            - type: string
              maxLength: 200
            - type: 'null'
          title: Judge Model Override
        kind:
          type: string
          enum:
            - model_judge
            - deterministic
          title: Kind
          default: model_judge
        format:
          type: string
          enum:
            - boolean
            - enum
            - numeric
            - score
          title: Format
          default: score
        tags:
          items:
            type: string
          type: array
          maxItems: 64
          title: Tags
      type: object
      required:
        - name
      title: EvaluatorCreate
    EvaluatorResponse:
      properties:
        id:
          type: string
          format: uuid
          title: Id
        organization_id:
          type: string
          format: uuid
          title: Organization Id
        name:
          type: string
          title: Name
        kind:
          type: string
          title: Kind
        format:
          type: string
          title: Format
        description:
          anyOf:
            - type: string
            - type: 'null'
          title: Description
        owner:
          anyOf:
            - type: string
            - type: 'null'
          title: Owner
        status:
          type: string
          title: Status
        config:
          additionalProperties: true
          type: object
          title: Config
        prompt:
          anyOf:
            - type: string
            - type: 'null'
          title: Prompt
        threshold:
          anyOf:
            - type: number
            - type: 'null'
          title: Threshold
        severity:
          type: string
          title: Severity
        judge_model_override:
          anyOf:
            - type: string
            - type: 'null'
          title: Judge Model Override
        tags:
          items:
            type: string
          type: array
          title: Tags
        created_by:
          anyOf:
            - type: string
              format: uuid
            - type: 'null'
          title: Created By
        created_at:
          type: string
          format: date-time
          title: Created At
        updated_at:
          type: string
          format: date-time
          title: Updated At
      type: object
      required:
        - id
        - organization_id
        - name
        - kind
        - format
        - description
        - owner
        - status
        - prompt
        - threshold
        - severity
        - judge_model_override
        - created_at
        - updated_at
      title: EvaluatorResponse
    ErrorResponse:
      properties:
        error:
          type: string
          title: Error
        message:
          type: string
          title: Message
      type: object
      required:
        - error
        - message
      title: ErrorResponse
      description: Standard error response returned by all API error handlers.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: x-api-key

````