GitHub - decolua/9router: Unlimited FREE AI coding. Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers. Auto-fallback, RTK -40% tokens, never h

9Router is a free, open-source local proxy that connects AI coding tools (Claude Code, Cursor, Cline, Codex, Copilot, etc.) to 40+ AI providers including free tiers. Key features include RTK Token Saver (20-40% input token reduction by compressing tool outputs like git diff and grep), smart 3-tier auto-fallback (subscription → cheap → free), multi-account round-robin, OAuth token auto-refresh, and format translation between OpenAI/Claude/Gemini APIs. Install via npm, configure once, and point any OpenAI-compatible tool at localhost:20128. Free providers like Kiro AI and OpenCode Free enable zero-cost unlimited coding.