LocalFree server, account needed

Solmail MCP server

ExpertVagabond/solmail-mcp

Compose, price and send physical letters and postcards, paid with Solana.

1 GitHub stars1 forks212 npm downloads / month
Source code

Install Solmail in Claude Code

Claude Code
claude mcp add solmail -e SOLANA_PRIVATE_KEY=... -- npx -y solmail-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "solmail": {
      "command": "npx",
      "args": [
        "-y",
        "solmail-mcp"
      ],
      "env": {
        "SOLANA_PRIVATE_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Solmail MCP server do?

Compose, price and send physical letters and postcards, paid with Solana.

Is the Solmail MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Solmail run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Solmail to Claude Code?

Run: claude mcp add solmail -e SOLANA_PRIVATE_KEY=... -- npx -y solmail-mcp

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