# Korean Business Registration Status Check

> Korean Business Registration Status Check is a paid API for AI agents from x402.pokt-agent.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Verifies whether a Korean business registration number (사업자등록번호) is active or invalid via a pay-per-call API using x402/USDC micropayments

## Facts

- Endpoint: GET https://x402.pokt-agent.com/kr-biz/status?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/korean-business-registration-status-check-42877fca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nIVeW_gwSpG_HjrS4_Wmd

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability korean-business-registration-status-check-42877fca
```

Example prompt: Can you check whether Korean business registration number 2208162517 is currently active?

## When to prefer this

Use this endpoint when you need a lightweight, accountless, pay-per-call check of a Korean business registration number's active status — ideal for KYB (Know Your Business) workflows, vendor onboarding, or compliance screening where you only need to verify registration validity without full corporate filings. Prefer this over full due diligence endpoints when you just need a quick active/invalid status signal for a 10-digit Korean business number.

## Known failure modes

- Missing or malformed b_no (not 10 digits) returns invalid_number or a validation error
- Payment failure via x402/USDC causes 402 Payment Required response blocking the call
- Non-existent or deregistered business numbers may return 'invalid_number' rather than a distinct 'inactive' status
- Rate limiting or upstream Korean registry downtime may cause timeouts

## How this service works

Pay-per-call Korean company due diligence, company ID crosswalk, sanctions screening with Korean name variants, Upbit/Bithumb risk events, HWP to Markdown, business status, business-day calendar, address normalisation, law, rates, filings and more. No account or API key: pay each call in USDC on Base via x402.

## Output

Returns a JSON array of results where each entry contains the queried b_no (10-digit Korean business registration number) and a status field indicating either 'active' (the business is registered and operating) or 'invalid_number' (the number does not correspond to a valid registration).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "b_no"
     ],
     "properties": {
      "b_no": {
       "type": "string",
       "description": "10-digit Korean business registration number"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "b_no": "2208162517",
    "status": "active"
   },
   {
    "b_no": "1234567890",
    "status": "invalid_number"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/korean-business-registration-status-check-42877fca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.pokt-agent.com](https://www.zero.xyz/host/x402.pokt-agent.com/llms.txt)