---
title: "Evaluate Experiment Adhoc"
method: POST
path: "/api/v1/runs/experiments/{experiment_id}/evaluate"
tags: ["experiments"]
---

# Evaluate Experiment Adhoc

`POST /api/v1/runs/experiments/{experiment_id}/evaluate`

Evaluate an existing experiment with a specific evaluator.

This triggers immediate evaluation using the run_over_dataset approach,
processing runs in batches to handle large experiments efficiently.

## Path parameters

- `experiment_id` string, uuid, required

## Request body

- EvaluateExperimentRequest — Request body for evaluating an experiment.
  - `rule_id` string, uuid, required

## Response `200`

Successful Response

- object

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/langchain-ai/apis/langsmith.md) · [All operations](https://skmtc.net/langchain-ai/apis/langsmith/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/langchain-ai/langsmith/revisions/a0acb3a6a101/schema)