Side-by-side comparison of two Model Context Protocol servers — install paths, tools, quality signals, and directory engagement so you can pick the right one for Claude, Cursor, and other MCP clients.
QQ MCP Server — connects to QQ via NapCatQQ (OneBot v11), giving AI agents direct control over QQ (send/receive messages, group management, auto-wake on incoming messages, and more).
Send physical mail with Solana payments — AI agents can compose, price, and send letters and postcards via cryptocurrency.