@localgov-jp/mcp-server

Model Context Protocol (MCP) server for LocalGov.jp — Japan's central + municipal subsidies, structured for AI agents.

LocalGov.jp covers 20,000+ subsidies across 1,627 municipalities (target 1,718). Of those, 20,810 are municipal grants that are not exposed by the J-Grants public API — that is the differentiator vs Digital Agency's official J-Grants MCP, which surfaces central + prefectural records only.

This server exposes 8 tools to MCP clients (Claude Desktop, Cursor, Cline, Windsurf, etc.).

Tools

Related MCP server: jpcite

Install

npm install -g @localgov-jp/mcp-server

Or add directly to your MCP client config (no global install required).

Configure — Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "localgov-jp": {
      "command": "npx",
      "args": ["-y", "@localgov-jp/mcp-server"]
    }
  }
}

Restart Claude Desktop. The 8 tools appear in the tool inspector.

Configure — Cursor / Cline / Windsurf

Same pattern: add an entry to your client's MCP config that runs npx -y @localgov-jp/mcp-server over stdio.

Configure — env

Citation

Every record returned includes:

• _source — LocalGov.jp canonical URL (cite this).

• source_url — original government page (cite this too).

Attribution required: cite as "via LocalGov.jp" with the _source URL. License: CC BY 4.0 for the structuring layer; original government content remains under its issuing body's terms.

Verifying citation receipts

The paid /api/cite/:id endpoint returns an Ed25519-signed snapshot. Use verify_receipt to confirm offline that an agent's stored citation is genuine and unexpired:

> verify_receipt(receipt: <the JSON envelope>)
{ "valid": true, "expired": false, "pubkey_match": true }

The trust anchor is published at https://localgov.jp/.well-known/citation-pubkey.

Differentiation vs Jグランツ MCP

Both are complementary. We recommend connecting both servers so an agent can answer "国 vs 自治体" exhaustively.

License

MIT. See LICENSE.

Operator: hello@localgov.jp