Claude Max API proxy

claude-max-api-proxy is a community tool that exposes your Claude Max/Pro subscription as an OpenAI-compatible API endpoint. This allows you to use your subscription with any tool that supports the OpenAI API format.

Why use this?

If you have a Claude Max or Pro subscription and want to use it with OpenAI-compatible tools, this proxy may fit some personal workflows. It is not an unlimited flat-rate path. API keys remain the clearer policy and billing path for production use.

How it works

Your App → claude-max-api-proxy → Claude Code CLI / claude -p → Anthropic     (OpenAI format)              (converts format)          (uses your login)

The proxy:

1. Accepts OpenAI-format requests at http://localhost:3456/v1/chat/completions
2. Converts them to Claude Code CLI commands
3. Returns responses in OpenAI format (streaming supported)

Getting started

npm install -g claude-max-api-proxy # Verify Claude CLI is authenticatedclaude --version

claude-max-api# Server runs at http://localhost:3456

# Health checkcurl http://localhost:3456/health # List modelscurl http://localhost:3456/v1/models # Chat completioncurl http://localhost:3456/v1/chat/completions \  -H "Content-Type: application/json" \  -d '{    "model": "claude-opus-4",    "messages": [{"role": "user", "content": "Hello!"}]  }'

{  env: {    OPENAI_API_KEY: "not-needed",    OPENAI_BASE_URL: "http://localhost:3456/v1",  },  agents: {    defaults: {      model: { primary: "openai/claude-opus-4" },    },  },}

Built-in catalog

Advanced configuration

cat > ~/Library/LaunchAgents/com.claude-max-api.plist << 'EOF'<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict>  <key>Label</key>  <string>com.claude-max-api</string>  <key>RunAtLoad</key>  <true/>  <key>KeepAlive</key>  <true/>  <key>ProgramArguments</key>  <array>    <string>/usr/local/bin/node</string>    <string>/usr/local/lib/node_modules/claude-max-api-proxy/dist/server/standalone.js</string>  </array>  <key>EnvironmentVariables</key>  <dict>    <key>PATH</key>    <string>/usr/local/bin:/opt/homebrew/bin:~/.local/bin:/usr/bin:/bin</string>  </dict></dict></plist>EOF launchctl bootstrap gui/$(id -u) ~/Library/LaunchAgents/com.claude-max-api.plist

Notes

• This is a community tool, not officially supported by Anthropic or OpenClaw
• Requires an active Claude Max/Pro subscription with Claude Code CLI authenticated
• Inherits Claude Code claude -p billing, usage-credit, and rate-limit behavior
• The proxy runs locally and does not send data to any third-party servers
• Streaming responses are fully supported

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