---
title: "Post Compute Batch"
method: POST
path: "/compute-batch"
---

# Post Compute Batch

`POST /compute-batch`

Compute many (region, selections) combinations in one request. Returns a
per-item list of {region, result|null, error|null} so a single failing
region is reported inline rather than failing the whole call.

## Request body

- ComputeBatchRequest
  - `items` ComputeBatchItem[]
    - `region` string — Which served region to compute. Discover the set with /v1/regions.
    - `selections` object
    - `cell_filter` string[], nullable
  - `summary_only` boolean

## Response `200`

Successful Response

- object

## Other responses

- `422` — Validation Error

## Changes

- **2026-08-26** `5897d963a448` — 1 warning, 1 info
  - removed the request property `items/items/county`
  - added the new optional request property `items/items/region`

[Change history](https://skmtc.dev/humanbaselines/apis/human-crash-baselines-api/changes/compute-batch/post.md)

---

[API](https://skmtc.dev/humanbaselines/apis/human-crash-baselines-api.md) · [All operations](https://skmtc.dev/humanbaselines/apis/human-crash-baselines-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/humanbaselines/human-crash-baselines-api/revisions/241d41b8922d/schema)