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Japan central + municipal subsidies (20,810 grants, 1,627 munis). 8 tools beyond Jグランツ MCP.
About
Japan central + municipal subsidies (20,810 grants, 1,627 munis). 8 tools beyond Jグランツ MCP.
Remote endpoints: streamable-http: https://localgov.jp/mcp
Security Report
This is a well-structured MCP server for Japanese subsidy and auction data with appropriate security controls. The code uses environment variables for configuration, validates inputs with Zod, and properly handles external API calls. No hardcoded credentials, malicious patterns, or dangerous operations were detected. The tool set matches the stated purpose, and permissions are appropriately scoped to network I/O and environment variable access. Supply chain analysis found 3 known vulnerabilities in dependencies (1 critical, 2 high severity). Package verification found 1 issue (1 critical, 0 high severity).
7 files analyzed · 9 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
@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
| # | Tool | Cost | Purpose |
|---|---|---|---|
| 1 | search_subsidies | free | Search by keyword / prefecture / municipality / category / amount |
| 2 | get_subsidy_detail | free | Single record with citation anchor |
| 3 | get_municipality_grants | free | All subsidies for one JIS code (1,627 municipalities covered) |
| 4 | find_supplementary_grants | free | Find municipal "上乗せ" grants stacking on a national subsidy |
| 5 | compare_municipal_subsidies | free | Compare same-category grants across nearby municipalities (siting / relocation) |
| 6 | subscribe_changes | $0.20 | Push webhook on grant changes (paid via x402; agent runtime handles payment) |
| 7 | verify_receipt | free | Offline Ed25519 signature verification of citation receipts |
| 8 | find_practitioner | free (referral) | Recommend 行政書士 / 税理士 / 中小企業診断士 / 社労士 for the grant |
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
| Variable | Default | Purpose |
|---|---|---|
LOCALGOV_API_BASE | https://localgov.jp | Override the REST API base (e.g. http://127.0.0.1:8787 for local wrangler dev) |
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
| Jグランツ MCP (デジタル庁公式) | LocalGov.jp MCP (this) | |
|---|---|---|
| Coverage | central + prefectural | 1,627 municipalities (target 1,718) + central |
| Municipal subsidies | 0 | 20,810 unique to us |
find_supplementary_grants | ✗ | ✓ |
compare_municipal_subsidies | ✗ | ✓ |
find_practitioner | ✗ | ✓ (referral funnel) |
| Citation receipts (Ed25519) | ✗ | ✓ |
| Change webhook | ✗ | ✓ (x402 paid) |
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
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