Thinking Tools 🧠

Five rigorous reasoning protocols for Claude & ChatGPT. Free, open-source, and zero extra credits — they run on the AI you're already talking to.

One MCP server. Works in both Claude and ChatGPT.

How it's free

The server runs no AI. Each tool returns an expert-designed protocol as plain text; your own Claude/ChatGPT reads it and does the reasoning in the same turn. No API key, no second bill.

That's also why you invoke it explicitly ("Debate this: ..."). An MCP server can't intercept your message before the AI sees it — that's a platform rule, not a missing feature.

Related MCP server: Clear Thought 1.5

Design principles baked into every protocol

• Steelman before attacking — never critique a weaker version than you'd defend

• Quote before accusing — no quote, no fallacy claim

• Never fake consensus — dissent is preserved, split verdicts are reported as split

• Invent nothing — no fabricated stats, sources, or citations; uncertain recall is labelled

• Separate "bad argument" from "false conclusion" — a bad argument can have a true conclusion

Use it

Debate this: should we rewrite the backend in Rust?
Red team my plan: [paste plan]
Audit this argument: [paste article]
Threat model: a public API with JWT auth and Postgres
Check this study: "Coffee cuts heart disease 50%, per a study of 40 people"

Deploy your own (free)

npm install
npx wrangler deploy      # prints your live URL

Your connector URL is that address + /mcp.

Connect it

• Claude (any plan): Settings → Connectors → Add custom connector → paste the /mcp URL

• ChatGPT (Plus+, desktop web): Settings → Connectors → Advanced → Developer mode → add the /mcp URL, Auth None

⚠️ Use the URL ending in /mcp — the bare address is just a status page.

License

MIT © 2026 Pranay Mahendrakar — free to use, modify, and share.