hai Lab — Japan Company Data (Bazaar / x402)

Search Japanese company basic info, financials, subsidies, and procurement directly from AI agents — paid per request via x402 on Bazaar.

Powered by gBizINFO (Ministry of Economy, Trade and Industry) public data.

What it does

AI agents (Claude, Cursor, ChatGPT, Copilot, etc.) can look up Japanese companies by corporate number or name, and retrieve financial, subsidy, and procurement information. Each call costs $0.01 USDC and is settled automatically via the CDP Facilitator on Base Sepolia. No accounts, no API keys for buyers — just pay-per-call.

Related MCP server: houjin-bangou-api-mcp

Architecture (current, working)

This is the production deployment that is indexed on the x402 Bazaar.

Important: The CDP SDK (createX402Server) does not run on Cloudflare Workers (JWT/crypto incompatibility). It runs on a Node.js server exposed through a Cloudflare Tunnel. See node/server.ts.

Paid endpoints (Bazaar-indexed)

All routes return English field names when ?en=1 is passed (e.g. company_name, address instead of 法人名, 所在地). Addresses are converted to English format via the jp-postal-code-api (Japan Post official romanized data), e.g. 東京都港区赤坂９丁目６番３５号 → 9-6-35 Akasaka, Minato-ku, Tokyo.

Run the Bazaar server locally

cd node
npm install
# CDP API keys (see CDP Portal)
export CDP_API_KEY_ID="..."
export CDP_API_KEY_SECRET="..."
npx tsx server.ts            # listens on http://localhost:8787

Expose it publicly (needs cloudflared):

./cloudflared tunnel --url http://localhost:8787
# → prints a https://<random>.trycloudflare.com URL

Verify Bazaar acceptance:

curl -X POST https://api.cdp.coinbase.com/platform/v2/x402/validate \
  -H "Content-Type: application/json" \
  -d '{"resource":"<YOUR_PUBLIC_URL>/v1/company/9010401014127","method":"GET"}'
# expect: "valid": true, simulation.outcome: "accepted"

Trigger indexing (paid settle)

Each route is indexed on the Bazaar after a successful settle through the CDP Facilitator:

npx tsx node/pay-all.ts    # pays $0.01 per route, triggers indexing

MCP Server

• Endpoint: https://hailab-japan-company-api.pickaxe.workers.dev/mcp

• Transport: Streamable HTTP

• Registry: io.github.HOTAgithub/hailab-japan-company-data

Data source

• Source: gBizINFO (Ministry of Economy, Trade and Industry)

• Commercial use permitted (per gBizINFO terms)

• Data accuracy is not guaranteed. Verify primary sources before critical decisions.

Repository layout

src/index.js        # Cloudflare Worker: data API + MCP server (+ English `en=1`)
node/server.ts      # Node.js Bazaar payment-gate server (CDP SDK) — PRODUCTION
node/english.ts     # Japanese → English translation (address via jp-postal-code-api)
node/pay-all.ts     # Trigger indexing on all routes via paid settle

License

MIT