---
title: "Run a saved judge on a conversation"
method: POST
path: "/v1/observability/judges/{judge_id}/live-judging"
tags: ["beta.observability.judges"]
---

# Run a saved judge on a conversation

`POST /v1/observability/judges/{judge_id}/live-judging`

Run a saved judge on a conversation

## Path parameters

- `judge_id` string, uuid, required

## Request body

- JudgeConversationRequest
  - `messages` object[], required
  - `properties` object, nullable

## Response `200`

Successful Response

- JudgeOutput
  - `analysis` string, required
  - `answer` union, required
    - string
    - number

## Other responses

- `400` — Bad Request - Invalid request parameters or data
- `404` — Not Found - Resource does not exist
- `408` — Request Timeout - Operation timed out
- `409` — Conflict - Resource conflict
- `422` — Unprocessable Entity - Validation error

## Changes

- **2026-08-14** `61436a496404` — 5 warning
  - added the new `OPTIMIZATION_TRIAL_KEY_ALREADY_EXISTS` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `400`
  - added the new `OPTIMIZATION_TRIAL_KEY_ALREADY_EXISTS` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `404`
  - added the new `OPTIMIZATION_TRIAL_KEY_ALREADY_EXISTS` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `408`
  - added the new `OPTIMIZATION_TRIAL_KEY_ALREADY_EXISTS` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `409`
  - …1 more

[Change history](https://skmtc.dev/mistral/apis/mistral-ai-api/changes/v1/observability/judges/:judge_id/live-judging/post.md)

---

[API](https://skmtc.dev/mistral/apis/mistral-ai-api.md) · [All operations](https://skmtc.dev/mistral/apis/mistral-ai-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mistral/apis/mistral-ai-api/revisions/4cb0b5382d4f?raw)