README.md•4.01 kB
# MCP Money
An MCP (Model Context Protocol) money implementation for Nostr using NDK (Nostr Development Kit) with Cashu ecash functionality.
## Features
- **Cashu Wallet Integration**: Full support for Cashu ecash mints and tokens
- **Lightning Network**: Deposit via Lightning invoices and pay Lightning invoices
- **Nostr Zaps**: Send zaps to users using npub or NIP-05 identifiers
- **Multi-mint Support**: Manage multiple Cashu mints simultaneously
- **Persistent Storage**: Wallet state saved to local file with mint info caching
- **MCP Server**: Expose wallet functionality through Model Context Protocol
- **CLI Interface**: Direct command-line usage for all wallet operations
## Installation
```bash
npm install mcp-money
```
## Usage
### MCP Server Mode (Default)
Run without arguments to start the MCP server:
```bash
npx mcp-money
```
### CLI Mode
Use specific commands for direct wallet operations:
```bash
# Get total balance
npx mcp-money get_balance
# Get balance per mint
npx mcp-money get_mint_balances
# Create deposit invoice
npx mcp-money deposit 1000 https://testnut.cashu.space
# Pay lightning invoice
npx mcp-money pay lnbc1...
# Send a zap
npx mcp-money zap npub1... 100 "Great post!"
# Add a new mint
npx mcp-money add_mint https://mint.example.com
```
### Authentication
The wallet supports multiple ways to provide your Nostr private key:
1. **Command line**: `--nsec nsec1...`
2. **Environment variable**: `NSEC=nsec1...`
3. **Config file**: Automatically saved to `.wallet.json`
4. **Auto-generate**: Creates new key if none provided
## MCP Tools
When running as an MCP server, the following tools are available:
- `get_balance`: Get the total wallet balance
- `get_mint_balances`: Get balance breakdown per mint
- `deposit`: Create a deposit invoice for specified amount and mint
- `pay`: Pay a Lightning invoice
- `zap`: Send a zap to a user
- `add_mint`: Add a mint to the wallet
## Integration with AI Assistants
### Claude Code Integration
To use this wallet with [Claude Code](https://claude.ai/code), add it to your project's MCP configuration:
```json
{
"mcpServers": {
"mcp-money": {
"command": "npx",
"args": ["mcp-money"]
}
}
}
```
Or install globally and reference the binary directly:
```bash
npm install -g mcp-money
```
```json
{
"mcpServers": {
"mcp-money": {
"command": "mcp-money"
}
}
}
```
### Goose Integration
To use this wallet with [Goose](https://github.com/square/goose), add it to your `~/.config/goose/config.yaml`:
If you have an nsec you want to use, you can set it by passing it as `--nsec nsec1...`.
```yaml
extensions:
money:
args:
- -y
- mcp-money
bundled: null
cmd: npx
description: Money for agents
enabled: true
env_keys: []
envs: {}
name: money
timeout: 300
type: stdio
```
After adding the configuration, restart your AI assistant to begin using the wallet tools.
## Configuration
The wallet automatically creates a `.wallet.json` file to store:
- Private key (nsec)
- Public key (npub)
- Configured relays
- Configured mints
- Cached mint information
## Architecture
Built on top of:
- **NDK**: Nostr Development Kit for Nostr protocol interactions
- **NDK Wallet**: Cashu wallet implementation
- **Nostr Tools**: Low-level Nostr utilities
- **Bun**: Fast JavaScript runtime and package manager
## Security
- Private keys are stored locally in `.wallet.json`
- Mint information is cached for performance
- All Nostr communications use standard NIP protocols
- Lightning payments require explicit confirmation
## License
MIT
## Contributing
1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests if applicable
5. Submit a pull request
## Support
For issues and questions, please open an issue on the GitHub repository.