Korea Business Verify (KBV)

Real-time Korean business verification via NTS.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Real-time Korean business verification via NTS. 10 free calls/day, then pay-per-call (x402).

    How to connect

    How to connect Korea Business Verify (KBV) to Claude

    The server address to paste into Claude settings:

    https://kbv-server-f7vfitmlkq-du.a.run.app/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Korea Business Verify (KBV) to ChatGPT

    The server address to paste into ChatGPT settings:

    https://kbv-server-f7vfitmlkq-du.a.run.app/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Korea Business Verify (KBV) to Cursor

    The server address to paste into Cursor settings:

    https://kbv-server-f7vfitmlkq-du.a.run.app/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (3)

    Raw names from tools/list. Only developers need these.

    check_korean_business_statusCheck the registration status of a Korean business by its 10-digit business registration number (사업자등록번호). Returns whether the business is active, suspended, or closed, plus tax type. Data source: Korea National Tax Service, real-time.
    check_korean_business_batchCheck the registration status of up to 100 Korean businesses in a single call by their 10-digit business registration numbers (사업자등록번호). Returns one status entry per input number (order preserved) plus a summary count. Use this instead of repeated single checks when screening supplier or customer lists. Recently checked numbers may be answered from a cache up to 24 hours old (marked "cache": true). Data source: Korea National Tax Service.
    verify_korean_businessVerify that a Korean business registration number matches the provided representative name and opening date. Use for KYB / due-diligence before transacting with a Korean company. Returns match result plus current status.