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Cronus UI MCP Server

by pedrogbraz Your server? Claim it
not responding

Cronus UI is listed as active in the registry but did not answer our last check. 69 installs a week from npm. It exposes 8 tools. Last commit 30 Sep 2026.

Search, install, compose, add-page, and theme Cronus UI from the live registry.

Installs per day peak 441 · avg 37 · -12% w/w
a month agotoday
Uptime history 61 days of history · worst day 0%
61 days agonow
0.0%
Uptime 24h
0 of 91 checks
8
Tools
read from the server
52 ms
Response time
average over 24h
69
Installs / week
npm and PyPI

What the code does

We read the source, 2 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

A line of code looks encrypted apps/www/lib/templates/portfolio/lib/click-8bit.ts:7, apps/www/lib/templates/portfolio/lib/drop-leather.ts:7, apps/www/lib/templates/portfolio/lib/switch-off.ts:7 и ещё 3 
    "data:audio/mpeg;base64,SUQzBAAAAAAAIlRTU0UAAAAOAAADTGF2ZjYyLjMuMTAwAAAAAAAAAAAAAAD/+1DAAAAAAAAAAAAAAAAAAAAAAABJbmZvAAAADwAAAAUAAATkAFVVVVVVVVVVVVVVVVVVVVVVVVV/f39/f39/f39/f39/f39/f39/f6qqqqqqqqqqqqqqqqqqqqqqqqqq1dXV1dXV1dXV1dXV1dXV1dXV1dX//////////////////////////wAAAABMYXZj…
Runs an external command packages/create-cronus-app/src/scaffold.ts:161, packages/mcp/src/cli.ts:97, packages/ui/src/components/color-picker.tsx:94 и ещё 3 
  const result = spawnSync(pm, ["install"], {
Touches key and credential files packages/create-cronus-app/src/scaffold.ts:53 
  npmrc: ".npmrc",

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

run in your terminal
claude mcp add cronus-ui --transport http https://aicronus.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://aicronus.com/mcp
~/.codex/config.toml
[mcp_servers.cronus-ui]
url = "https://aicronus.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "cronus-ui": {
      "url": "https://aicronus.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cronus-ui": {
      "type": "http",
      "url": "https://aicronus.com/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

blocks
list_blocks
List the installable Cronus UI blocks (registry items of type 'registry:block') — larger, composed sections such as hero, pricing, login, and dashboard. Returns each block's name, title, dependencies, and its `npx cronus-ui add <name>` install command.
catalog
list_catalog
Return compact Hydra-ready cards for every component, block, variant, and template: name, short description, design style, palette, motion, intents, and the install command. No source files — cheap on tokens. Filter with `kind`. Use `match_catalog` to pick the best item for a prompt (login + smooth animation, etc.).
component
get_component
Fetch the full detail for a single Cronus UI component or block by name: its source file(s) (path + content), its npm `dependencies`, its `registryDependencies` (other registry items it needs), and the `npx cronus-ui add <name>` install command. Works for both components and blocks.
components
list_components
List the installable Cronus UI components (registry items of type 'registry:ui'). Returns each component's name, a readable title, its npm and registry dependencies, and the `npx cronus-ui add <name>` command to install it.
design
get_design_context
Return the Cronus UI visual taste file (DESIGN.md) for a theme × look. Use this before generating UI so the agent follows Aurora/Neutral dual identity, one primary CTA, hairline elevation, and look rules. compact fits a system prompt; extended is the repo file. Does not modify the project.
install
get_install_command
Build the `npx cronus-ui add ...` command for one or more components/blocks. The CLI resolves and installs each item's registry dependencies automatically. This only returns the command string — to actually install, use `install_component`.
match
match_catalog
Two-query catalog match for low-context agents. Pass a free-text `query` (e.g. 'login page with smooth animation') and/or structured filters (`intent`, `motion`, `style`, `palette`). Returns `pick` (the recommended combination), `intent` hits, `motion` hits, and ranked `matches`. Cards carry description, design style, palette, motion, and intents — not source. Fetch source with `get_component` only after picking a name.
registry
search_registry
Fuzzy-search Cronus UI components and blocks by name (case-insensitive substring match). Use this to find the right item before fetching its source with `get_component`.

Endpoints

URLTransportStateLatencyChecked
https://aicronus.com/mcp streamable-http answering 52 ms 10 min ago

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Cronus UI — questions

Answers built from our own checks of this server.

What can Cronus UI do?
It exposes 8 tools, read directly from the server on our last check. Among them: get_component, get_design_context, get_install_command, list_blocks, list_catalog, list_components and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Cronus UI working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 52 ms. The bar chart above shows every period we have measured.
The registry lists Cronus UI as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Cronus UI?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Cronus UI need an API key?
No. Cronus UI completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How many people use Cronus UI?
The npm package cronus-ui-mcp was installed 69 times in the last week. Week over week that is -12%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Cronus UI open source?
The code is open source: it is published under the MIT licence, written in TypeScript and 1 stars on GitHub. The licence covers the code in the repository, not the hosted service at aicronus.com, which runs on its operator's own terms.