Solmail

Overview

Solmail is a Model Context Protocol (MCP) server: Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.

It runs locally: the npm package solmail-mcp speaks MCP over stdio on your machine. Configuration happens through environment variables — you'll need SOLANA_PRIVATE_KEY. The current release is v1.0.2, published under the MIT license, with source at ExpertVagabond/solmail-mcp on GitHub.

You'll find Solmail in the AI & Agents category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain Solmail for ExpertVagabond, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

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

Requires SOLANA_PRIVATE_KEY