Japan Data MCP Server

by mameta29 Your server? Claim it

local only

Japan Data MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 53 installs a week from npm. Last commit 22 Jul 2026.

30 tools for Japanese data: address, furigana, transit, Diet, holidays, weather, corporate registry

Installs per day peak 18 · avg 10 · +19% w/w

a month agotoday

Installs / week

npm · @mameta/japan-data-mcp

Stars

0 open issues

22 Jul 2026

Last commit

0 releases in 90 days

Apache-2.0

License

TypeScript

Nothing serious here today

Today is the operative word: we check Japan Data MCP 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

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add japan-data-mcp -- npx -y @mameta/japan-data-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "japan-data-mcp": {
      "args": [
        "-y",
        "@mameta/japan-data-mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.japan-data-mcp]
command = "npx"
args = ["-y", "@mameta/japan-data-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "japan-data-mcp": {
      "args": [
        "-y",
        "@mameta/japan-data-mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "japan-data-mcp": {
      "args": [
        "-y",
        "@mameta/japan-data-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: EVM_PRIVATE_KEY (Private key of a USDC-funded wallet used to pay per-call x402 fees. Optional: without it the server starts and lists all tools, but paid tool calls return a 'payments disabled' error.). The author declared them in the registry entry; get the values from the project itself.

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answering

Japan Data MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Japan Data MCP?

Japan Data MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @mameta/japan-data-mcp was installed 53 times last week.

How do I connect Japan Data MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @mameta/japan-data-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Japan Data MCP?

The npm package @mameta/japan-data-mcp was installed 53 times in the last week. Week over week that is +19%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Japan Data MCP open source?

Yes — it is published under the Apache-2.0 licence, written in TypeScript and 2 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.