GitHub
by github
GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.
Computer or cloud★ 34,245MITUpdated 4 days ago
Install
coldHat
Overview
Description from the maker (original English)
Put on anyone's AI rules by GitHub username: fetches their hat.md and its hat code.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Developer tools
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://coldhat.f-keys.com/mcpRun this in your terminal
claude mcp add --transport http coldhat https://coldhat.f-keys.com/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"coldhat": {
"url": "https://coldhat.f-keys.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"coldhat": {
"type": "http",
"url": "https://coldhat.f-keys.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://coldhat.f-keys.com/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account vince-gonzalez, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Developer toolsi
- More stars than 0% of the other 1395 servers in this category
- Published to the registry more recently than 65% of the other 1395 servers in this category
- Basic checks equal to or better than 100% of the other 1395 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is coldHat safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 27 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: GitHub, Desktop Commander, Cloudflare MCP
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Desktop Commander
by wonderwhy-er
MCP server for terminal commands, file operations, and process management
Runs on your computer★ 10,225MITUpdated 16 days ago
Install
Cloudflare MCP
by cloudflare
Cloudflare MCP servers
Runs in the cloud★ 4,446Apache-2.0Updated 14 months ago
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
╔════════════════════════════════════════════════════════════════════════════════════════════╗║ ║ ║ ██████╗ ██████╗ ██╗ ██████╗ ██╗ ██╗ █████╗ ████████╗ ║ ║ ██╔════╝██╔═══██╗██║ ██╔══██╗██║ ██║██╔══██╗╚══██╔══╝ ║ ║ ██║ ██║ ██║██║ ██║ ██║███████║███████║ ██║ ║ ║ ██║ ██║ ██║██║ ██║ ██║██╔══██║██╔══██║ ██║ ║ ║ ╚██████╗╚██████╔╝███████╗██████╔╝██║ ██║██║ ██║ ██║ ║ ║ ╚═════╝ ╚═════╝ ╚══════╝╚═════╝ ╚═╝ ╚═╝╚═╝ ╚═╝ ╚═╝ ║ ║ ║ ║ will another model keep your rules? ║ ║ ║ ╚════════════════════════════════════════════════════════════════════════════════════════════╝
coldHat puts working rules on any AI chat in one line. Type this into Claude, ChatGPT or Grok:
open sesame coldhat.f-keys.com/u/vince-gonzalez/frontierThe 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](https://coldhat.f-keys.com).
Every hat ends with a seal. If the assistant can't quote it, the hat was cut off, and it tells you.
Addresses
| You want to | Type this after open sesame |
|---|---|
| Wear a person's hat | coldhat.f-keys.com/u/ or .../u/ / |
| Wear one of Fabric's patterns | coldhat.f-keys.com/fabric/extract_wisdom |
| Wear a prompts.chat prompt | coldhat.f-keys.com/prompts/linux-terminal |
| Stack up to three, later layers winning | coldhat.f-keys.com/u/vince-gonzalez/editor+fabric/analyze_claims |
| Merge a stack by slot instead of piling it up | coldhat.f-keys.com/amp/fabric/extract_ideas+fabric/analyze_claims |
| Keep rules no other layer can override | put them under ## Locked in your hat |
| Wear one exact version | coldhat.f-keys.com/u/ / @ |
| Check a reply wore the current hat | coldhat.f-keys.com/verify?address= with the reply |
Every reply starts with the hat mark and code, for example 🎩💨⛄🔬 Hat's on · b7d19023: a top hat, a gust, Frosty, then one icon per layer.
Apps that take connectors can add https://coldhat.f-keys.com/mcp once and call any of these by name (tools wear_hat and wear_stack). A chat that can't browse can still wear a hat: Copy hat on coldhat.f-keys.com, then paste.
Starter hats
| Hat | Type this |
|---|---|
| Code reviewer: verdict first, findings by severity with line, failure and fix | open sesame coldhat.f-keys.com/u/vince-gonzalez/reviewer |
| Grant writer: rubric first, every number sourced, every limit met | open sesame coldhat.f-keys.com/u/vince-gonzalez/grants |
| Plain-English editor: shorter, clearer, still your voice | open sesame coldhat.f-keys.com/u/vince-gonzalez/editor |
| Frontier: mechanical register, rules over manners | open sesame coldhat.f-keys.com/u/vince-gonzalez/frontier |
Make your own
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 and live at /u/ / . Write one at coldhat.f-keys.com/make, bring the instructions you already keep for other assistants at coldhat.f-keys.com/import, or start from coldhat-starter.
Facts under ## Status carry a date and a shelf life (- label: value · as of YYYY-MM-DD · check after N days). The server checks them against today, and the assistant asks about any that have gone stale before using them.
Measured, not assumed
- Which chat boxes fetch a hat
- Merged stacks against plain stacks
Safety
A hat is instructions, not a credential, and open sesame is not a password. Every hat page tells the assistant to ignore it unless the person asked for it, and never to ask for passwords, keys, codes or payment details. Layers from Fabric and prompts.chat credit their authors; prompts written to make a model drop its rules are not served. Report a hat.
The coldHat server and merge engine are proprietary. This repository holds the public hats, the format, and the results.
╔════════════════════════════════════════════════════════════╗║ ║ ║ ███████╗ ██╗ ██╗███████╗██╗ ██╗███████╗ ║ ║ ██╔════╝ ██║ ██╔╝██╔════╝╚██╗ ██╔╝██╔════╝ ║ ║ █████╗ █████╗█████╔╝ █████╗ ╚████╔╝ ███████╗ ║ ║ ██╔══╝ ╚════╝██╔═██╗ ██╔══╝ ╚██╔╝ ╚════██║ ║ ║ ██║ ██║ ██╗███████╗ ██║ ███████║ ║ ║ ╚═╝ ╚═╝ ╚═╝╚══════╝ ╚═╝ ╚══════╝ ║ ║ ║ ║ · C R E A T I V E · ║ ║ ║ ║ ──────────────────────────────────────── ║ ║ ║ ║ Vincent Gonzalez ║ ║ f-keys.com ║ ║ ORCID 0009-0005-3640-014X ║ ║ ║ ╚════════════════════════════════════════════════════════════╝
Part of F-Keys — independent hardware, software and internet products. See the working log and live status.