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

# Start a simulation

> Requires simulations:run. Judges the dataset with the pack's published version. Returns before the run finishes.



## OpenAPI

````yaml /openapi.json post /api/simulations
openapi: 3.1.0
info:
  title: judged.systems
  version: 0.1.0
  description: >-
    Judge one support ticket. Product routes accept an API key or a browser
    session. If a key is sent, the session is not used. POST /api/judge and POST
    /api/webhooks/inbound accept an API key only. Send the key in the x-api-key
    header or as Authorization: Bearer.
servers:
  - url: https://judged.systems
security:
  - apiKey: []
  - bearerAuth: []
  - {}
tags:
  - name: Packs
  - name: Judge
  - name: Evaluations
  - name: Reviews
  - name: Labels
  - name: Datasets
  - name: Simulations
  - name: Stats
  - name: Webhooks
paths:
  /api/simulations:
    post:
      tags:
        - Simulations
      summary: Start a simulation
      description: >-
        Requires simulations:run. Judges the dataset with the pack's published
        version. Returns before the run finishes.
      operationId: startSimulation
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StartSimulationBody'
      responses:
        '202':
          description: The run has been queued.
          content:
            application/json:
              schema:
                type: object
                required:
                  - id
                properties:
                  id:
                    type: string
        default:
          $ref: '#/components/responses/Error'
components:
  schemas:
    StartSimulationBody:
      type: object
      required:
        - datasetId
        - packId
      properties:
        datasetId:
          type: string
          minLength: 1
        packId:
          type: string
          minLength: 1
    Error:
      type: object
      required:
        - error
      properties:
        error:
          type: string
        issues:
          type: array
          items:
            type: object
  responses:
    Error:
      description: >-
        Error body is { error: string }. Status is 400, 401, 403, 404, 409, 429,
        or 500. A 400 from a schema failure also includes issues.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: x-api-key
    bearerAuth:
      type: http
      scheme: bearer
      description: 'The API key, sent as Authorization: Bearer.'

````

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