Mcptoon - MCP CLI client cutting token usage by 97%

Show HN: Mcptoon – MCP CLI client that cuts tool discovery tokens by 97%

Mcptoon is a token-efficient MCP CLI client that dramatically reduces the token overhead of MCP (Model Context Protocol) interactions. It achieves a 97% reduction in tool discovery tokens and 40-60% reduction in result tokens by using TOON (Token-Optimized Object Notation) instead of verbose JSON. This pure Python, zero-dependency tool works with every AI agent—including Claude Code, Codex, OpenCode, and Cursor—and supports both stdio and HTTP MCP servers. With a simple CLI, configurable output formats, and safety features, Mcptoon helps developers save significant context window space, enabling more efficient AI conversations.