Connects Claude to SealedMail, an on-chain messaging protocol built on Sui blockchain. Handles encrypted private messages without requiring users to connect a browser wallet extension. The MCP server manages the wallet setup and interaction with Sui's smart contracts directly through stdio transport. Reach for this when you want Claude to send or receive encrypted messages stored on-chain, whether you're building notification systems, secure communication workflows, or blockchain-based messaging apps. The npx install keeps setup minimal, though you'll want to check the GitHub docs for wallet configuration and API key requirements before getting started.