Korea Business Verify (KBV)

by Wonderfulian · remote · no sign-in to list tools · v0.3.0 · published by GitHub user Wonderfulian

Find and verify Korean businesses by name or number. 10 free calls/day, then pay-per-call (x402).

Changes · 2

Compare Registry entry

4 tools: 2 change things and 2 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things2Claude Code: ask: see these tools
Only reads2Claude Code: allow: see these tools

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http kbv https://kbv-server-f7vfitmlkq-du.a.run.app/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnfind_korean_business
The description contains "every other tool", wording about other tools or servers.
Matched text
description: "...siness registration number — the number every other tool here needs. Returns ranked candidates w..."
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 2Creates or changes something that can be changed back.Claude Code: ask

check_korean_business_batchScreen a list of up to 100 Korean businesses in a single call by their 10-digit business registration numbers (사업자등록번호).Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Screen a list of up to 100 Korean businesses in a single call by their 10-digit business registration numbers (사업자등록번호). Returns one entry per input number (order preserved) with registration status, tax type, and any public-procurement debarment ("부정당업자 제재") on record — a company can be perfectly active and still barred from public contracts. The summary counts how many are currently debarred. Use this for supplier, vendor or customer list screening instead of repeated single checks. Recently checked numbers may be answered from a cache up to 24 hours old (marked "cache": true). Sources: Korea National Tax Service, Public Procurement Service.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
verify_korean_businessVerify that a Korean business registration number matches the provided representative name and opening date.Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Verify 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.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Only reads 2Looks things up and changes nothing.Claude Code: allow

check_korean_business_statusCheck the registration status of a Korean business by its 10-digit business registration number (사업자등록번호).Reads text others writeNo findings
Why it is in this group
- The name "check_korean_business_status" says "status": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Check 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. The number 1248100998 (Samsung Electronics) is exempt from the daily free tier, so you can exercise this tool while building without spending your allowance.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
find_korean_businessFind a Korean company by name (English or Korean) when you do not know its 10-digit business registration number — the number every other tool here needs.Reads text others write1 finding
Why it is in this group
- The name "find_korean_business" says "find": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The description contains "every other tool", wording about other tools or servers.
  Matched text
  description: "...siness registration number — the number every other tool here needs. Returns ranked candidates w..."
  What this check looks for
Description, as the server wrote it
Find a Korean company by name (English or Korean) when you do not know its 10-digit business registration number — the number every other tool here needs. Returns ranked candidates with a confidence score and discriminating evidence (registration status, tax type, region), because a name can match several distinct companies: "Samsung Electronics" matches four. Sources: DART (disclosure filers, English names) and the Public Procurement Service registry (small businesses).
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write4: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; check_korean_business_batch
check_korean_business_status
find_korean_business
verify_korean_business
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Looked at Oct 22, 2026, 14:55 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 3
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: none
RFC 9728 protected resource metadata: none
Authorization servers: none
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 3 tools that change things (3 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://kbv-server-f7vfitmlkq-du.a.run.app/mcp: tools/list returned 5 tools to an anonymous client, including check_korean_business_batch (write), verify_korean_business (write), check_korea_import_requirements (write)
What this check looks for

Install

Pinned to version 0.3.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http kbv https://kbv-server-f7vfitmlkq-du.a.run.app/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__kbv__check_korean_business_status",
      "mcp__kbv__find_korean_business"
    ],
    "ask": [
      "mcp__kbv__check_korean_business_batch",
      "mcp__kbv__verify_korean_business"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as kbv. Review it before you use it.

Capability tags behind 4 rules

mcp__kbv__check_korean_business_status untrusted-input
mcp__kbv__check_korean_business_batch untrusted-input
mcp__kbv__find_korean_business untrusted-input
mcp__kbv__verify_korean_business untrusted-input

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.Wonderfulian/kbv-server/changes.xml

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Anlyon alternative

2 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry · repository. Synced Oct 21, 2026, 18:22 UTC.

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