Japan Corporate Number (NTA) MCP Server

by mk-career-planning Your server? Claim it

answering

Japan Corporate Number (NTA) is answering right now. Last checked 14 min ago. It exposes 4 tools.

What does Japan's tax agency publish for this corporate number? NTA Web-API relay with sources.

Uptime history 15 hours of history

15 hours agonow

100.0%

Uptime 24h

53 of 53 checks

Tools

read from the server

1101 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Japan Corporate Number (NTA) every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add jp-corporate-number --transport http https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.jp-corporate-number]
url = "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "jp-corporate-number": {
      "url": "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "jp-corporate-number": {
      "type": "http",
      "url": "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

nta

nta_corporate_number_lookup

What does Japan's National Tax Agency (NTA) publish for this 13-digit corporate number? Returns the name, furigana, English name, kind, location, assignment date and, when the record states it, the closure date with the recorded cause code and successor corporate number (no reason is inferred). Optional change history. Distinguishes not found in the NTA records from could not check. Carries the NTA Web-API source statement. Not an official result.

nta_corporate_number_search

Which Japanese corporate numbers could this organization name refer to? Searches the National Tax Agency (NTA) Web-API by name (prefix match after the legal form, with the NTA's fuzzy matching), optionally within a prefecture, and returns every candidate with corporate number, name, location and recorded closure date, marked exact_name or fuzzy_candidate. Never picks one for you. Carries the NTA Web-API source statement. Not an official result.

catalog

catalog

List the tools of this server with prices, data sources, licensing, daily limits and data freshness.

receipt

get_receipt

Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 30 days after settlement.

Endpoints

URL	Transport	State	Latency	Checked
https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp	streamable-http	answering	1159 ms	14 min ago

Alternatives to Japan Corporate Number (NTA)

same job, measured the same way

Japan Corporate Number and Certifications (gBizINFO)

by mk-career-planning

Which Japanese corporate numbers match this company name? gBizINFO (METI) relay with sources.

5 tools answering

Japan Corporate Number

by pipeworx-io

japan-corporate-number — Japan's National Tax Agency (国税庁) corporate number register (法人番号公表サイト).…

286 installs/wk 46 tools answering

Japan Real Estate Transaction Prices (MLIT)

by mk-career-planning

What real estate transaction prices has MLIT published for this Japanese municipality? As published.

4 tools answering

Shirabe Japan Data Hub

by shirabe

Japan data tools for AI agents: calendar (rokuyo), address, name splitting, corporate number lookup

5 tools answering

TweetAPI MCP

by tweetapi

Read-only public Twitter data and TweetAPI docs for AI agents. Not affiliated with X Corp.

answering

PlugRail JP Corporate

by plugrail

Search Japanese corporations and verify invoice numbers using official National Tax Agency data.

7 tools answering

Edinet

by pipeworx-io

EDINET — Japan's corporate-filings system (Financial Services Agency).

343 installs/wk 48 tools answering

Japan National Exam Pass Results

by mk-career-planning

Japanese national exam pass counts and rates as published by MHLW, with source and checks.

4 tools answering

Japan Corporate Number (NTA) — questions

Answers built from our own checks of this server.

What can Japan Corporate Number (NTA) do?

It exposes 4 tools, read directly from the server on our last check. Among them: catalog, get_receipt, nta_corporate_number_lookup, nta_corporate_number_search. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Japan Corporate Number (NTA) working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 53 of 53 checks got a reply (100.0%), average response time 1101 ms. The bar chart above shows every period we have measured.

How do I connect Japan Corporate Number (NTA)?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Japan Corporate Number (NTA) need an API key?

No. Japan Corporate Number (NTA) completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Japan Corporate Number (NTA)?

It answers our handshake in 1101 ms on average, which is faster than 3% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.