Claude Plan Setup

MARDUK Kit works with five Anthropic billing flavors. Pick the one that matches your situation.

TL;DR

Option 1: Claude Pro/Max via OAuth proxy

If you already pay Anthropic $20/mo (Pro) or $100/mo (Max) for the chat app, you can route Marduk through that subscription with zero extra cost.

npm install -g claude-max-proxy
claude-max-proxy auth                # opens browser; log in once
claude-max-proxy start --port 3456 &

In ~/.openclaw/openclaw.json:

"env": { "OPENAI_BASE_URL_MAX": "http://localhost:3456/v1" },
"auth": { "order": { "openai": ["openai:max-proxy", "openai:default"] } }

Limits

• Pro: ~50 msgs / 5h sustained
• Max: ~250 msgs / 5h sustained (varies by model)

Option 2: Anthropic API direct

1. Go to console.anthropic.com
2. Settings → API Keys → Create Key
3. Copy the sk-ant-api03-... value
4. Paste into setup.sh when prompted

Pricing reference

Option 3: Hybrid (recommended)

Most cost-effective for serious users. Pro/Max for high-frequency low-stakes work, API for Opus-tier work.

"agents": {
  "list": [
    { "id": "main",   "model": { "primary": "openai/claude-sonnet-4" } },
    { "id": "cipher", "model": { "primary": "anthropic/claude-opus-4" } },
    { "id": "atlas",  "model": { "primary": "anthropic/claude-opus-4" } },
    { "id": "scout",  "model": { "primary": "openai/claude-haiku-4" } }
  ]
}

Real cost expectations

Switching providers later

openclaw config set env.ANTHROPIC_API_KEY "sk-ant-api03-NEW..."
openclaw config set agents.defaults.model.primary "anthropic/claude-sonnet-4"
openclaw doctor --fix