Snug is a clipboard manager for Mac. It keeps your clipboard history, pinboards and search like other managers. When you copy an API key, Snug moves it to the macOS Keychain and gives your AI agent a short ref such as sec_7f3a. The agent runs programs with the key through the snug command and never sees the value, so the key never lands in a chat log. Agents can also read your clips and edit pinboards through Snug's MCP server (Claude Code, Claude Desktop, Cursor, Codex). 7-day free trial with the full app, then $9 once.