# Korea Business Verify (KBV)

> Korea Business Verify (KBV) is a paid API for AI agents from kbv-server-f7vfitmlkq-du.a.run.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Looks up the real-time registration status and tax type of a Korean business by its 10-digit business registration number (사업자등록번호) via the National Tax Service (NTS)

## Facts

- Endpoint: GET https://kbv-server-f7vfitmlkq-du.a.run.app/v1/business/:brno/status
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/korea-business-verify-kbv-0a913b35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tue8E8yU_eIg0Xvb245_9

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 korea-business-verify-kbv-0a913b35
```

Example prompt: Can you check whether the Korean business with registration number 1234567890 is currently active and what tax type it has?

## When to prefer this

Use this endpoint when you need real-time, authoritative Korean business registration status directly from the National Tax Service (NTS) — especially for KYB compliance, vendor onboarding, fraud prevention, or any workflow involving Korean business counterparties. Prefer this over scraped or cached data sources when accuracy and freshness are critical.

## Known failure modes

- Invalid or malformed BRNO (not 10 digits) returns a validation error
- Business number not found in NTS database returns a not-found or unknown status
- NTS API downtime or rate limiting may cause upstream failures
- Hyphens/spaces in the BRNO may need to be stripped before submission
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Korean business registration status + tax type by business number (NTS, real-time)

## Output

Returns the real-time registration status (e.g. active, closed, suspended) and tax type (e.g. general, simplified, exempt) of the Korean business associated with the provided 10-digit business registration number, sourced directly from the National Tax Service (NTS).

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "brno"
     ],
     "properties": {
      "brno": {
       "type": "string",
       "description": "10-digit Korean business registration number; hyphens/spaces allowed"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/korea-business-verify-kbv-0a913b35/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kbv-server-f7vfitmlkq-du.a.run.app](https://www.zero.xyz/host/kbv-server-f7vfitmlkq-du.a.run.app/llms.txt)