---
title: "Recompute Baseline"
method: POST
path: "/api/v1/biomech/baselines/recompute"
tags: ["Biomech"]
---

# Recompute Baseline

`POST /api/v1/biomech/baselines/recompute`

Recompute one player's normalized baseline from existing pitch/frame rows.

## Headers

- `x-api-key` string, required — Required API key issued by Preciser.
- `League` string, required — Required tenant/database selector, for example pitchbio-master.

## Request body

- BiomechBaselineRecomputeRequest
  - `player` PlayerRef, required — Reference a player either by canonical player_id or pitchbio alias.
    - `player_id` string, nullable — Canonical player_id
    - `alias` string, nullable — Pitchbio player alias, for example pitcher_001
  - `skip_existing` boolean

## Response `200`

Successful Response

- BiomechBaselineRecomputeResponse
  - `success` boolean, required
  - `player_id` string, required
  - `skipped` boolean, required
  - `num_pitches` integer, required
  - `num_sessions` integer, required
  - `frames_inserted` integer, required

## Other responses

- `422` — Validation Error

## Changes

- **2026-08-27** `9b0abde08b06` — 4 breaking, 2 info
  - the `header` request parameter `League` became required
  - the `header` request parameter `x-api-key` became required
  - `header` request parameter `League` list-of-types was narrowed by removing types `null`
  - `header` request parameter `x-api-key` list-of-types was narrowed by removing types `null`
  - …2 more

[Change history](https://skmtc.dev/preciser/apis/preciser-data-management-api/changes/api/v1/biomech/baselines/recompute/post.md)

---

[API](https://skmtc.dev/preciser/apis/preciser-data-management-api.md) · [All operations](https://skmtc.dev/preciser/apis/preciser-data-management-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/preciser/preciser-data-management-api/revisions/9b0abde08b06/schema)