Gives Claude direct access to your system clipboard through six tools: read and write text, read HTML, watch for changes, probe available formats, and clear. Built in Rust as a single binary with no runtime dependencies, using 1Password's arboard library for native clipboard access on Windows, macOS, and Linux. The watch_clipboard tool is the standout: Claude can wait up to five minutes for you to copy something, then react to it immediately. Useful for workflows where you want to copy an error or snippet and have Claude transform it without pasting into chat. HTTP mode available for remote access. Linux users on bare window managers need a clipboard manager running or content won't persist.