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 subscription and want to use it with OpenAI-compatible tools, this proxy may reduce cost for some workflows. API keys remain the clearer policy path for production use.

How it works

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

The proxy:

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

Getting started

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```bash}
npm install -g claude-max-api-proxy

# Verify Claude CLI is authenticated
claude --version
```

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# List models
curl http://localhost:3456/v1/models

# Chat completion
curl http://localhost:3456/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

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```json5}
{
  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

Links

• npm: https://www.npmjs.com/package/claude-max-api-proxy
• GitHub: https://github.com/atalovesyou/claude-max-api-proxy
• Issues: https://github.com/atalovesyou/claude-max-api-proxy/issues

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
• The proxy runs locally and does not send data to any third-party servers
• Streaming responses are fully supported

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