@lynq/crypto

Crypto payment provider for lynq MCP framework. Supports USDC, USDT, DAI, ETH on Base, Ethereum, Polygon, and Solana.

Install

npm install @lynq/crypto @lynq/lynq

Usage

import { createMCPServer } from "@lynq/lynq";
import { crypto } from "@lynq/crypto";

const server = createMCPServer({ name: "my-server", version: "1.0.0" });

server.tool("premium-feature", crypto({
  recipient: "0x...",
  amount: 5, // 5 USDC
  baseUrl: "http://localhost:3000",
}), {
  description: "A paid feature",
}, async (args, c) => {
  return c.text("Premium content here");
});

With Hono adapter

import { mountLynq } from "@lynq/hono";

mountLynq(app, server, {
  pages: { crypto: true },
});

Options

| Option | Type | Default | Description | |---|---|---|---| | recipient | string | required | Wallet address | | amount | number | required | Amount in token units | | baseUrl | string | required | Base URL for callback | | token | string | "USDC" | Token: USDC, USDT, DAI, ETH, or custom | | network | string | "base" | Network: base, base-sepolia, ethereum, polygon, solana, or custom | | callbackPath | string | "/payment/crypto/callback" | Callback route path | | sessionKey | string | "payment" | Session key for payment state | | once | boolean | false | Only charge once per session | | message | string | — | Elicitation message | | timeout | number | 300000 | Elicitation timeout (ms) | | skipIf | (c) => boolean | — | Skip middleware conditionally | | onComplete | (c) => void | — | Run after successful payment |

Documentation

https://hogekai.github.io/lynq/

License

MIT