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

# Update Evaluator

> Modify an existing evaluator configuration

<Warning>
  <strong>For users in the European Union:</strong> Please use `eu.api.helicone.ai` instead of
  `api.helicone.ai`.
</Warning>


## OpenAPI

````yaml put /v1/evaluator/{evaluatorId}
openapi: 3.0.0
info:
  title: helicone-api
  version: 1.0.0
  license:
    name: MIT
  contact: {}
servers:
  - url: https://api.helicone.ai/
  - url: http://localhost:8585/
security: []
paths:
  /v1/evaluator/{evaluatorId}:
    put:
      tags:
        - Evaluator
      operationId: UpdateEvaluator
      parameters:
        - in: path
          name: evaluatorId
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateEvaluatorParams'
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Result_EvaluatorResult.string_'
      security:
        - api_key: []
components:
  schemas:
    UpdateEvaluatorParams:
      properties:
        scoring_type:
          type: string
        llm_template: {}
        code_template: {}
        name:
          type: string
        last_mile_config: {}
      type: object
      additionalProperties: false
    Result_EvaluatorResult.string_:
      anyOf:
        - $ref: '#/components/schemas/ResultSuccess_EvaluatorResult_'
        - $ref: '#/components/schemas/ResultError_string_'
    ResultSuccess_EvaluatorResult_:
      properties:
        data:
          $ref: '#/components/schemas/EvaluatorResult'
        error:
          type: number
          enum:
            - null
          nullable: true
      required:
        - data
        - error
      type: object
      additionalProperties: false
    ResultError_string_:
      properties:
        data:
          type: number
          enum:
            - null
          nullable: true
        error:
          type: string
      required:
        - data
        - error
      type: object
      additionalProperties: false
    EvaluatorResult:
      properties:
        id:
          type: string
        created_at:
          type: string
        scoring_type:
          type: string
        llm_template: {}
        organization_id:
          type: string
        updated_at:
          type: string
        name:
          type: string
        code_template: {}
        last_mile_config: {}
      required:
        - id
        - created_at
        - scoring_type
        - llm_template
        - organization_id
        - updated_at
        - name
        - code_template
        - last_mile_config
      type: object
      additionalProperties: false
  securitySchemes:
    api_key:
      type: apiKey
      name: Authorization
      in: header
      description: 'Bearer token authentication. Format: ''Bearer YOUR_API_KEY'''

````