WTAgent is an open-source MIT command-line coding agent that turns ChatGPT Web (including Pro) into Codex and Claude Web into Claude Code. Instead of paying for a model API, it drives the web chats you already have: it reads and edits local files, runs shell commands and tests in agentic loops, and feeds results back to the model for the next step. No API key, MCP, tunnel, or plugin is needed. From one terminal it also supports DeepSeek, Gemini, Grok, Kimi and Zhipu GLM. It installs with npm install -g wtagent, runs on macOS, Linux and Windows (WSL2 supported), and opens an isolated Chrome profile per provider using your own login and quota. MIT licensed and fully open source on GitHub.
