Claude Max API Proxy Setup

Overview

Replace per-token Claude API billing ($15-75/M tokens) with a flat-rate proxy through your Claude Max ($200/mo) or Pro ($20/mo) subscription. The claude-max-api-proxy package exposes your authenticated Claude Code CLI session as an OpenAI-compatible HTTP endpoint on localhost:3456.

How it works: The proxy uses your already-authenticated claude CLI session to forward requests. No API keys are stored or transmitted by the proxy — it relies on your local CLI login. Any OpenAI-compatible client (OpenClaw, LangChain, custom scripts) connects to localhost:3456.

Source code: github.com/atalovesyou/claude-max-api-proxy — review the source before installing.

When to Use

• Agent API costs exceed $20/month and you have a Claude Max or Pro subscription
• You want to run Claude Opus 4.6, Sonnet 4.6, or Haiku 4.5 without per-token charges
• You're configuring OpenClaw, LangChain, or any OpenAI-compatible client to use Claude