Solmail MCP Server

by expertvagabondio.github.ExpertVagabond/solmailv1.0.2

Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide

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Maintained42d ago

Install Solmail MCP server

claude mcp add solmail -e SOLANA_PRIVATE_KEY='<solana-private-key>' -- npx -y solmail-mcp

{
  "mcpServers": {
    "solmail": {
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "<solana-private-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "solmail": {
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "<solana-private-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "solmail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "<solana-private-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "solmail": {
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "<solana-private-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
SOLANA_PRIVATE_KEY	yes	yes	Your agent's Solana wallet private key (base58 or JSON array format)
SOLANA_NETWORK	—	—	Solana network: devnet for testing, mainnet-beta for production
SOLMAIL_API_URL	—	—	SolMail API endpoint
MERCHANT_WALLET	—	—	Merchant wallet address for payments

Freshness

Maintained — last maintenance signal 42d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-08-28 · 42d ago · GitHub
Latest release
2026-03-16 · 7mo ago · GitHub · v1.1.0
Package published
no data · npm/PyPI
Registry entry updated
2026-02-03 · 8mo ago · official registry · v1.0.2

FAQ

›How do I install the Solmail MCP server in Claude Code?

Run: claude mcp add solmail -e SOLANA_PRIVATE_KEY='<solana-private-key>' -- npx -y solmail-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Solmail require an API key?

Yes. It expects SOLANA_PRIVATE_KEY, of which 1 is a secret.

›Can I use Solmail as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Solmail in the official MCP registry?

Yes, as io.github.ExpertVagabond/solmail.