liteoauthllm

README

liteoauthllm

A lightweight local AI gateway proxy that uses ChatGPT or Claude subscription OAuth to proxy requests to OpenAI and Anthropic APIs.

Quick Start

go install github.com/lu-zhengda/liteoauthllm/cmd/liteoauthllm@latest

liteoauthllm login openai        # Opens browser for OAuth
liteoauthllm login anthropic     # Paste token from `claude setup-token`
liteoauthllm                     # Start proxy on :8639

export OPENAI_BASE_URL=http://127.0.0.1:8639/v1
export ANTHROPIC_BASE_URL=http://127.0.0.1:8639

See examples/ for Pydantic AI, LangChain, Vercel AI SDK, and more.

How It Works

Routes requests by path, injects auth headers, streams responses back unmodified.

Path	Provider	Notes
/v1/responses	OpenAI	Codex models only (e.g. gpt-5.3-codex)
/v1/messages	Anthropic	All subscription models
/v1/models	Auto-detect	anthropic-version header → Anthropic, otherwise OpenAI

Legal

This project is not affiliated with OpenAI or Anthropic. For personal, local use only. You are solely responsible for compliance with provider terms of service. Provided "as is" with no warranty.

License

MIT