:mailbox_with_mail: solmail-mcp
Send real physical mail using Solana cryptocurrency from your AI agent. A Model Context Protocol server that enables Claude and other AI agents to send physical letters and postcards to real addresses worldwide, paid with SOL. Built for the Colosseum Agent Hackathon (#47).
Install
npx solmail-mcp@latestAdd to your MCP config:
{
"mcpServers": {
"solmail": {
"command": "npx",
"args": ["-y", "solmail-mcp"],
"env": {
"SOLANA_NETWORK": "devnet",
"SOLANA_PRIVATE_KEY": "your_base58_private_key"
}
}
}
}Features
- Physical Mail -- Letters printed and mailed to 200+ countries via Lob.com
- Solana Payments -- Pay with SOL on devnet (testing) or mainnet (production)
- Non-Custodial -- Direct wallet control, no intermediaries
- AI-Native -- Built specifically for MCP agent integration
- Demo Mode -- Test with devnet SOL and Lob test API at zero cost
Tools (4)
| Tool | Description |
|---|---|
get_mail_quote |
Get price quote for sending mail (country, color options) |
send_mail |
Send a physical letter with Solana payment |
get_wallet_balance |
Check agent wallet SOL balance |
get_wallet_address |
Get wallet address for funding |
