Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide
Connect Runs on your machine
claude mcp add solmail -e SOLANA_PRIVATE_KEY=<SOLANA_PRIVATE_KEY> -e SOLANA_NETWORK=<SOLANA_NETWORK> -e SOLMAIL_API_URL=<SOLMAIL_API_URL> -e MERCHANT_WALLET=<MERCHANT_WALLET> -- npx -y [email protected]{
"mcpServers": {
"solmail": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SOLANA_PRIVATE_KEY": "<SOLANA_PRIVATE_KEY>",
"SOLANA_NETWORK": "<SOLANA_NETWORK>",
"SOLMAIL_API_URL": "<SOLMAIL_API_URL>",
"MERCHANT_WALLET": "<MERCHANT_WALLET>"
}
}
}
}{
"mcpServers": {
"solmail": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SOLANA_PRIVATE_KEY": "<SOLANA_PRIVATE_KEY>",
"SOLANA_NETWORK": "<SOLANA_NETWORK>",
"SOLMAIL_API_URL": "<SOLMAIL_API_URL>",
"MERCHANT_WALLET": "<MERCHANT_WALLET>"
}
}
}
}{
"servers": {
"solmail": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SOLANA_PRIVATE_KEY": "<SOLANA_PRIVATE_KEY>",
"SOLANA_NETWORK": "<SOLANA_NETWORK>",
"SOLMAIL_API_URL": "<SOLMAIL_API_URL>",
"MERCHANT_WALLET": "<MERCHANT_WALLET>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
SOLANA_PRIVATE_KEYRequired, secret | Your agent's Solana wallet private key (base58 or JSON array format) |
SOLANA_NETWORKOptional | Solana network: devnet for testing, mainnet-beta for production |
SOLMAIL_API_URLOptional | SolMail API endpoint |
MERCHANT_WALLETOptional | Merchant wallet address for payments |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 3 Feb 2026 |
| Last updated | 3 Feb 2026 |
| Registry name | io.github.ExpertVagabond/solmail |
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