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. 58 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 15 · avg 5 · +12% w/w

a month agotoday

Installs / week

npm · @mameta/japan-data-mcp

Stars

1 open issue

22 Jul 2026

Last commit

no 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": {
      "command": "npx",
      "args": [
        "-y",
        "@mameta/japan-data-mcp"
      ]
    }
  }
}

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Optional settings from the registry entry, left out of the block above: 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).

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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 58 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 in the form 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 58 times in the last week. Week over week that is +12%. 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, 2 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.