🍋 create-lemon-agent

Scaffold an AI agent that pays per API call with USDC — running in 90 seconds.

npx create-lemon-agent my-agent
cd my-agent
npm install
cp .env.example .env   # paste your LEMON_CAKE_PAY_TOKEN
npm start "東京の天気は？"

Token scope: When issuing a Pay Token at lemoncake.xyz/dashboard, choose ALL services so the agent can discover and call any available API. A SINGLE-service token will be rejected when the agent tries a different service.

A 30-line Claude Agent SDK project, pre-wired to lemon-cake-mcp. Your agent discovers paid services, pays in USDC autonomously, and every charge is auto-journaled into freee or Money Forward when connected.

What you get

my-agent/
├── package.json          # @anthropic-ai/claude-agent-sdk + lemon-cake-mcp
├── .env.example          # LEMON_CAKE_PAY_TOKEN= placeholder
├── tsconfig.json
├── README.md
└── src/
    └── index.ts          # 30-line Claude agent that uses paid services

Run output

$ npm start "東京の天気は？"

🍋 Asking Claude: "東京の天気は？"
[tool] mcp__lemon-cake__list_services({…})
[tool] mcp__lemon-cake__call_service({"service":"serper",…})
今日の東京は晴れ、最高22℃です。
✓ Done. Cost: 0.004 USD (Claude) + LemonCake charges
📊 Charges sync to freee/Money Forward daily if connected

Why USDC / JPYC — not plain yen?

AI agents need micro-payments: $0.001 per API call. Bank transfers minimum is ¥1 and cards eat the fee. USDC/JPYC settle instantly with near-zero cost.

Want yen? Use JPYC (Polygon ERC-20 pegged 1:1 to yen). No FX risk, no crypto-asset tax complexity.

vs. alternatives

| | LemonCake | Composio | RapidAPI | Skyfire | |---|---|---|---|---| | Micro-payments ($0.001/call) | ✅ | ❌ | ❌ | ✅ | | Japan tax (withholding + invoice) | ✅ | ❌ | ❌ | ❌ | | freee / MF auto-journal | ✅ | ❌ | ❌ | ❌ | | JPYC (yen-pegged) | ✅ | ❌ | ❌ | ❌ | | MCP server support | ✅ | ❌ | ❌ | ❌ | | npx scaffold in 90 sec | ✅ | ❌ | ❌ | ❌ |

Why

• No infra to host. lemon-cake-mcp runs locally via npx, no servers to deploy.
• No token plumbing. Claude Agent SDK auto-discovers the MCP tools.
• Real receipts. Connect freee / Money Forward in the dashboard and every call shows up as a journal entry — qualified-invoice & withholding-tax aware.

Companion projects

| Surface | Package | For | |---------|---------|-----| | MCP server | lemon-cake-mcp | Claude Desktop / Cursor / Cline users | | ElizaOS plugin | eliza-plugin-lemoncake | ElizaOS agent builders | | Starter kit | create-lemon-agent (this) | Anyone with npx |

Links

• 🌐 LemonCake
• 📚 Quickstart docs
• 💬 Issues

License

MIT