---
title: "Validate a Korean business registration number checksum (사업자등록번호)"
method: POST
path: "/api/kr-business-number"
tags: ["Korean"]
---

# Validate a Korean business registration number checksum (사업자등록번호)

`POST /api/kr-business-number`

## Request

- Base URL: `https://toolsthatdontupload.com`
- URL: `https://toolsthatdontupload.com/api/kr-business-number`
- Auth: one of:
  - none
  - API key in header `X-API-Key`

## Request body

- object
  - `number` string, required

## Response `200`

Success (JSON)

## Other responses

- `400`: Invalid input (problem+json)

---

[API](https://skmtc.dev/toolsthatdontupload/apis/tools-that-don-t-upload-api.md) · [All operations](https://skmtc.dev/toolsthatdontupload/apis/tools-that-don-t-upload-api/llms.txt) · [OpenAPI document](https://skmtc.dev/toolsthatdontupload/apis/tools-that-don-t-upload-api/revisions/fc4cea318919?raw)