Grill MCP server

🔥 Grill

A second opinion on your decisions, from a different AI company than the one you think with.

Setup guide: grillyour.ai

Tell the assistant you think with, "grill this": Claude, ChatGPT, Copilot, Gemini, Grok or Muse. It writes up your decision, and you check it. Then an outside judge, a model from a different company, argues the strongest case against it. It names the cheapest test that would settle each doubt, and gives a verdict.

Verdict: shaky. The plan assumes customers stay at the new price, and nothing in it tests that.

Falsifier: show the new price to one in ten new signups for two weeks, and compare how many start paying.

Set up

Claude Desktop (Mac or Windows): the one-click judge, 2 minutes

Grill this: we're moving our launch to March. I'm 70% sure it gets us more signups.

1. Get a key for Grill's model router: go to openrouter.ai/keys, sign in, click Create key, and add $5 of credit. A grill costs about a cent.
2. Install Grill. Download grill.mcpb and double-click it, or drag it onto the Claude window. Paste your key when Claude asks. There's nothing else to install; Claude Desktop runs it.
3. Try it. In any chat, type:

claude.ai on the web or your phone: no key needed

To add everything at once instead, go to Customize → Plugins → Add → Add marketplace and enter mtangoz/grill.

1. Download grill-skill.zip. In Claude, open Customize → Skills, upload it, and switch it on.

1. Say "grill this: …". Claude writes the judge's prompt. Tap Open in ChatGPT, or paste it into Gemini, then paste the answer back into Claude.

Want it in one step? Use Claude Desktop, above.

ChatGPT, Copilot, Gemini, Grok or Muse: no install, no key

1. Copy the Grill prompt into the assistant you think with, and say what you're deciding.
2. It writes your decision up with you, then gives you a prompt for the judge.
3. Paste that into an assistant from a different company, then paste the answer back.

Claude Code

/plugin marketplace add mtangoz/grill
/plugin install grill@grill

It asks for your model router key, or uses OPENROUTERAPIKEY if it's already set.

The weekly review (optional)

Say "run my weekly decision review". Claude reads the tools you've connected (Customize → Connectors: Gmail, Google Calendar, Google Drive, Notion, Granola and the like). Then it:

• lists the decisions you made this week;
• asks you to put a number on each: what you expect, by when, and how sure you are;
• grills the one that matters most;
• brings back the ones whose results are in.

Your log lives in a Google Drive folder or Notion database you choose. Once a month, you bet on how many of your calls will come true.

Install: upload weekly-review-skill.zip the same way, or add the plugin.

What it costs

Shortened. The full README is on GitHub.