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

# List the built-in evaluators

> List every evaluator this server ships with, along with the `data` fields each one needs and the settings it accepts. The keys of `evaluators` are the ids you put in the evaluate path. The list is the same for every caller and needs no credential.



## OpenAPI

````yaml GET /api/evaluations/list
openapi: 3.1.0
info:
  title: LangWatch API
  version: 1.0.0
  description: LangWatch openapi spec
servers:
  - url: https://app.langwatch.ai
security:
  - project_api_key: []
paths:
  /api/evaluations/list:
    get:
      tags:
        - Evaluations
      summary: List the built-in evaluators
      description: >-
        List every evaluator this server ships with, along with the `data`
        fields each one needs and the settings it accepts. The keys of
        `evaluators` are the ids you put in the evaluate path. The list is the
        same for every caller and needs no credential.
      operationId: getApiEvaluationsList
      parameters: []
      responses:
        '200':
          description: The evaluator catalogue
          content:
            application/json:
              schema:
                type: object
                properties:
                  evaluators:
                    type: object
                    additionalProperties:
                      type: object
                      properties:
                        name:
                          type: string
                          description: Display name of the evaluator
                        description:
                          type: string
                        category:
                          type: string
                        docsUrl:
                          type: string
                        isGuardrail:
                          type: boolean
                          description: >-
                            Whether this evaluator can gate a request as a
                            guardrail
                        requiredFields:
                          type: array
                          items:
                            type: string
                          description: '`data` keys the evaluate call must supply'
                        optionalFields:
                          type: array
                          items:
                            type: string
                        settings:
                          type: object
                          additionalProperties: {}
                          description: Each setting's default and description
                        settings_json_schema:
                          type: object
                          additionalProperties: {}
                          description: JSON Schema for this evaluator's settings object
                        envVars:
                          type: array
                          items:
                            type: string
                          description: Server-side variables the evaluator needs configured
                        result:
                          type: object
                          additionalProperties: {}
                          description: What its score, passed and label mean
                      required:
                        - name
                        - description
                        - category
                        - isGuardrail
                        - requiredFields
                        - optionalFields
                        - settings
                        - settings_json_schema
                        - envVars
                        - result
                    description: >-
                      Keyed by evaluator id, the value you put in the evaluate
                      path
                required:
                  - evaluators
      security: []
components:
  securitySchemes:
    project_api_key:
      type: apiKey
      in: header
      name: X-Auth-Token
      description: >-
        Project API key for sending traces and accessing project-scoped
        resources. Format: sk-lw-... (no underscore). Obtain one by creating a
        project via the Admin API or the LangWatch UI.

````