ckg-mcp · Pro tier

One install.
Every domain.
Any LLM.

Works with Claude, GPT-4o, Gemini, Llama, Mistral — and any tool that speaks MCP. Set one env var. Unlock everything.

Free
$0
forever
pip install ckg-mcp →
Most popular
Pro
$99/mo
billed monthly · cancel anytime
Upgrade to Pro — $99/mo →

After you pay — 60 seconds to activate.

1
Check your email — your license key arrives immediately after checkout. It looks like xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
2
Set the env var — in your shell, Claude Desktop config, or .env:
export CKG_API_KEY=your-license-key-here
3
That's it. Restart your MCP client and run list_domains — all 85 domains appear. No reinstall, no version change.
list_domains() # → Available domains (85): agent-reliability, ai-governance, algebra-1 ...

Works with every LLM and agent framework.

Claude (Desktop + API) GPT-4o / ChatGPT Gemini Llama 3 Mistral LangChain LangGraph smolagents OpenAI SDK Cursor Windsurf Any MCP client

MCP (Model Context Protocol) is an open standard — ckg-mcp plugs into any client that supports it. One pip install, one env var, any model.

Why it's worth $99/month.

MetricRAGCKG (this tool)Improvement
Macro-F1 accuracy0.1230.4714× more accurate
Tokens / query2,98226911× fewer tokens
Cost / correct answer$0.013$0.000526× cheaper per hit
5-hop reasoning F10.1700.7724.5× on hard queries

Benchmark v0.6.2 · 45 domains · 7,928 queries · open methodology · read the paper →