coldHat MCP server
online · 100% uptimePut on anyone's AI rules by GitHub username: fetches their hat.md and its hat code.
0 stars
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
coldHat tools (1)
write = sends, deletes, buys or postswear_hatFreeFetch a person's coldHat: their working rules, voice and dated facts. Call it when the user asks to put on a hat or says "open sesame" with a name or a coldhat.f-keys.com/u/ address, then follow the hat for the rest of the conversation, starting with the first reply it describes.
Public scan report
scanner v0.1.10 · 2026-10-13 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 1380ms20/20
- Tool poisoning1 tool descriptions checked15/15
- Auth qualityopen endpoint, read-only tools10/15
- Maintenancelast push 1 days ago15/15
- Maintainer identityregistry namespace matches repository owner6/10
How coldHat compares
Against every graded Developer tools MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 88/100
- higher than 75% of 1,119 Developer tools servers
- Tools
- 1
- the typical Developer tools server has 7
- Tools that change things
- 0%
- typical: 5%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote Developer tools server answers 100%
- Response time
- 190 ms
- faster than 62% of 443 Developer tools servers
What its tools let an agent do: 1 read
Install coldHat in Claude Code, Cursor or VS Code
claude mcp add --transport http coldhat https://coldhat.f-keys.com/mcp
What the publisher says
From the coldHat repository's README, as published. We do not edit it. Read it on GitHub
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║ will another model keep your rules? ║
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╚════════════════════════════════════════════════════════════════════════════════════════════╝coldHat puts your working rules on any AI chat in one line. Type this into Claude, ChatGPT or Grok:
open sesame coldhat.f-keys.com/u/vince-gonzalezThe assistant reads the hat, answers with its hat code to prove it read it, and works by those rules for the rest of the chat. Live at coldhat.f-keys.com.
Recorded 2026-10-11 in Claude (incognito) and Grok (private). Both quote 33963b16, the frontier hat's live code, which they can only know by reading the page. Models keep their own copy of a page for a while, so after an edit the code they quote can trail the live one. A playful version, with the main hat's joke opener, is in docs/demo.gif.
Try one now. Starter hats anyone can wear:
A hat is a hat.md in a public GitHub repository named coldhat, so only its owner can change it. Extra hats go in hats/.md at /u//. Dated facts under ## Status (- label: value · as of YYYY-MM-DD · check after N days) are checked by the server against today's date, and the assistant asks about any that have gone stale. Which chat boxes work was measured, not assumed.
Edit your hat in your own editor
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
coldHat: common questions
- Is coldHat MCP server safe?
- Yes, by our scan: it is graded A (88/100). Read the coldHat safety report
- How do I install coldHat?
- It runs remotely at coldhat.f-keys.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does coldHat need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is coldHat maintained?
- The last commit was 23 days ago (2026-10-12). The latest release is v0.1.0.
- Is coldHat up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- What can I use instead of coldHat?
- Servers from other publishers that do the same job: GitDiagram MCP server, GitHub MCP server and Gk CLI MCP server.
- How does coldHat compare with other Developer tools MCP servers?
- safety score 88/100 (higher than 75% of 1,119 Developer tools servers); tools 1 (the typical Developer tools server has 7); tools that change things 0% (typical: 5%. Fewer write tools means less an agent can break). Full comparison.
Alternatives to coldHat
Same job from other publishers: the closest match first, then the best rated.
- GitDiagramArchitecture diagrams, explanations and Mermaid source for public GitHub repositories.not reviewedEstablishedA
- GitHubConnect AI assistants to GitHub - manage repos, issues, PRs, and workflows through natural language.not reviewedEstablishedA
Gk CLIThe GitKraken MCP Server for managing repos, PRs, issues across GitHub, GitLab, Bitbucket and more.not reviewedEstablishedB- Agent HarnessesAgent-harness picks, decision guides, setup templates, and skills; live GitHub/HN discovery.not reviewedEstablishedA
uploads.shHost files from coding agents; stage on a branch and attach to GitHub PRs.not reviewedEstablishedA
