---
title: "Rescore Evaluation"
method: POST
path: "/evaluations/rescore"
tags: ["Evaluations"]
---

# Rescore Evaluation

`POST /evaluations/rescore`

## Request

- Base URL: `https://trace.wandb.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://trace.wandb.ai/evaluations/rescore`
- Auth: none declared

Rescore an existing evaluation run with different scorer(s).

Applies the provided scorer(s) to the predictions from source_evaluation_run_id
and returns a new evaluation_run_id. Original prediction call IDs are preserved.

## Request body

- RescoreReq: Full rescore request including server-set fields.
  - `source_evaluation_run_id` string, required: The evaluation run whose predictions will be rescored
  - `scorer_refs` string[], required: Scorer references (weave:// URIs) to apply; must be non-empty
  - `project_id` string, required
  - `wb_user_id` string, nullable: Do not set directly. Server will automatically populate this field.

## Response `200`

Successful Response

- RescoreRes: Response for a rescore request.
  - `call_id` string, required: Call ID for /evaluations/status polling
  - `evaluation_run_id` string, required: The newly created EvaluationRun ID

## Other responses

- `422`: Validation Error

## Changes

- **2026-10-16** `dd89fadfe4e4`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/wandb/apis/fastapi/changes/evaluations/rescore/post.md)

---

[API](https://skmtc.dev/wandb/apis/fastapi.md) - [All operations](https://skmtc.dev/wandb/apis/fastapi/llms.txt) - [OpenAPI document](https://skmtc.dev/wandb/apis/fastapi/revisions/f7643c49bf2e?raw)