Content
# x402 + CDP MCP Server
> Transform any AI agent into a payment-enabled tipping agent using x402 payment collection with CDP automatic disbursement.
## 🌟 About tip.md
**tip.md** is a platform that allows developers to receive cryptocurrency tips directly to their wallets via a simple button embeddable in GitHub READMEs, websites, or any markdown content. It supports:
- **Multiple Blockchains**: Ethereum, Base,Solana, and Bitcoin Lightning Network
- **Direct-to-Wallet Payments**: Tips go straight to your wallet, no custody
- **Simple Integration**: One button, works everywhere markdown is supported
- **4% Platform Fee**: Transparent pricing, we only make money if you do
- **Client-Side Security**: All transactions processed securely in the browser
This MCP server extends tip.md's functionality by enabling **any AI agent** to facilitate crypto tipping through the innovative x402 + CDP integration.
## 🚀 Quick Demo (No Setup Required)
**For Judges & Evaluators**: Experience the x402 + CDP tipping flow instantly:
```bash
git clone https://github.com/OnChainMee/payment-enabled-agent-x402.git
cd payment-enabled-agent-x402
npm install
NODE_ENV=demo npm start
```
**⚠️ Important**: The server running alone shows logs, but to see the **demo payment functionality**, you need to connect it to an MCP client (see [Testing with MCP Clients](#testing-with-mcp-clients) below).
## 🎯 What This Does
**Core Innovation**: ANY AI agent + this MCP = instant payment-enabled agent
- **x402 Payment Collection**: Users pay from dedicated wallets using the x402 payment protocol (Money IN)
- **CDP Automatic Disbursement**: Backend automatically splits payments (96% recipient, 4% platform) via Coinbase Wallet API (Money OUT)
- **MCP Tool Integration**: Works with Claude, ChatGPT, Cursor, or any MCP-compatible agent
- **True Composability**: Transform existing AI workflows into payment-enabled experiences
### 🔄 The Complete Flow
1. **User: "Check balance"** → Agent: *"47.50 USDC available for tipping"*
2. **User asks AI agent**: "Tip @username 5 USDC"
3. **x402 Payment Collection**: Agent generates payment request, user pays from dedicated wallet
4. **CDP Automatic Disbursement**: Backend splits payment and sends to recipient + platform
5. **AI Confirms**: "✅ Sent 5 USDC to @username"
## Architecture: True x402 → CDP Flow
### User Payment Flow
```
User → Dedicated Tipping Wallet → x402 Payment Collection → CDP Agent Wallet → CDP Disburses to Recipient (96%) + Platform (4%)
```
## 📋 Available MCP Tools
This MCP server exposes **7 tools** that any AI agent can use:
### **💰 x402 + CDP Payment Tools (Hackathon Innovation)**
- **`mcp_tip_md_tip_on_base`**: Send USDC tips on Base using x402 payment protocol with CDP automatic disbursement
- **`mcp_tip_md_tip_on_solana`**: Send USDC tips on Solana using x402 payment protocol
- **`mcp_tip_md_check_tipping_balance`**: Check/create your dedicated tipping wallet balance and info
### **🔧 Wallet Management Tools**
- **`mcp_tip_md_export_tipping_wallet`**: Export your tipping wallet private key (security sensitive)
- **`mcp_tip_md_withdraw_tipping_funds`**: Withdraw USDC from your tipping wallet to any address
### **🔍 User & Network Tools**
- **`mcp_tip_md_get_user_wallet_types`**: Check recipient's supported cryptocurrencies and wallet types
- **`mcp_tip_md_crypto_tipping`**: Manual crypto tipping information for agents with wallet to instruct (Ethereum, Base, Solana - no x402/CDP flow)
### **🏥 System Tools**
- **`mcp_tip_md_ping`**: Health check endpoint
## 🧪 Testing with MCP Clients
To see the **actual demo payment functionality**, you need to connect the MCP server to a compatible client:
### Cursor IDE Setup
1. **Edit your MCP configuration** (`~/.cursor/mcp.json`):
```json
{
"mcpServers": {
"tip-md-demo": {
"command": "node",
"args": ["dist/mcp-server/src/index.js"],
"cwd": "/path/to/payment-enabled-agent-x402",
"env": {
"NODE_ENV": "demo"
}
}
}
}
```
2. **Restart Cursor** and look for the 🔨 tools icon
3. **Test the demo**:
- Type: "Tip user johndoe 5 USDC using base blockchain"
- Watch the x402 + CDP simulation in action!
### Claude Desktop Setup
1. **Install Supergateway** (bridges our HTTP transport to stdio):
```bash
npm install -g supergateway
```
2. **Configure Claude Desktop** (`~/Library/Application Support/Claude/claude_desktop_config.json`):
```json
{
"mcpServers": {
"tip-md-demo": {
"command": "npx",
"args": [
"-y",
"supergateway",
"--httpStream",
"http://localhost:3000/mcp",
"--outputTransport",
"stdio"
]
}
}
}
```
3. **Start the MCP server** in demo mode:
```bash
NODE_ENV=demo npm start
```
4. **Restart Claude Desktop** and test with: "Show me available tip.md tools"
### Other MCP Clients
For clients supporting HTTP-stream transport:
- **Endpoint**: `http://localhost:3000/mcp` (when running locally)
- **Transport**: HTTP-stream
- **Environment**: Set `NODE_ENV=demo` for simulation mode
## 🛠️ Production Integration (Requires Setup)
For full integration with the tip.md platform:
### Environment Variables
Create a `.env` file:
```bash
# Database Connection (Required for production)
MONGODB_URI=mongodb+srv://username:password@cluster.mongodb.net/database
# Coinbase Developer Platform (Required for CDP disbursement)
CDP_API_KEY_ID=your_cdp_api_key_id
CDP_API_KEY_SECRET=your_cdp_api_key_secret
# x402 Configuration (Required for payment collection)
X402_WALLET_PRIVATE_KEY=your_x402_wallet_private_key
# Optional Configuration
PORT=3000
NODE_ENV=production
LOG_LEVEL=info
```
### Production Deployment
```bash
npm install
npm run build
npm start
```
## 🏗️ Technical Architecture
### x402 Payment Collection
- **Dedicated Wallets**: Each user gets a unique payment wallet
- **Protocol Compliance**: Full x402 specification implementation
### CDP Automatic Disbursement
- **Smart Splitting**: 96% to recipient, 4% to platform
- **Instant Settlement**: Automated via Coinbase Developer Platform
### MCP Integration
- **Universal Compatibility**: Works with any MCP-compatible AI agent
- **Structured Responses**: Rich JSON responses for seamless integration
- **Error Handling**: Graceful fallbacks and detailed error messages
### Key Differentiators
1. **Universal Agent Integration**: Any MCP client becomes payment-enabled
2. **Complete Payment Flow**: x402 collection + CDP disbursement in one solution
3. **Zero-Setup Demo**: Judges can evaluate immediately
4. **Production-Ready**: Already integrated with tip.md platform
## 📚 Learn More
- **tip.md Platform**: https://tip.md
- **MCP Protocol**: https://modelcontextprotocol.io
- **x402 Specification**: https://docs.coinbase.com/x402
- **Coinbase CDP**: https://docs.cdp.coinbase.com
## 🤝 Support
For questions about this hackathon entry:
- **Issues**: Open a GitHub issue
- **Demo Problems**: Ensure you're testing through an MCP client, not just the server logs
