Atomic CSS MCP Server

by yoodaekyung Your server? Claim it

not responding

Atomic CSS is listed as active in the registry but did not answer our last check.

Utility CSS for any platform — near-zero learning curve. Built for developers and AI alike

Uptime history 51 days of history · worst day 0%

51 days agonow

0.0%

Uptime 24h

0 of 91 checks

—

Tools

hidden behind auth

1124 ms

Response time

average over 24h

open, no key

Access

sse

Atomic CSS does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add atomic-css --transport http https://atomiccss.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "atomic-css": {
      "url": "https://atomiccss.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.atomic-css]
url = "https://atomiccss.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "atomic-css": {
      "url": "https://atomiccss.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "atomic-css": {
      "url": "https://atomiccss.dev/mcp"
    }
  }
}

Endpoints

URL	Transport	State	Latency	Checked
https://atomiccss.dev/mcp	sse	answering	1124 ms	5 min ago

Alternatives to Atomic CSS

same job, measured the same way

Zapier Dev MCP

by arose26

For Zapier integration developers: inspect, lint, and validate zapier-platform-cli projects.

35 installs/wk local only

Fat Heron Developer Platform

by fatheron

MCP control plane for AI developers managing customer mail, DNS, projects, keys, and diagnostics.

answering

Secdim

by secdim

Personalised developer security learning pathways from SecDim's challenges and courses.

7 tools answering

Agent Toolkit

by white-hat-lab

Pay-per-call developer utilities and npm supply-chain security tools for coding agents, over x402.

45 installs/wk local only

Kitbag MCP

by syedtaj7

Zero-config MCP server bundling 50+ utility tools: converters, OCR, scraping, and formatters.

39 installs/wk local only

Onto

by ravixalgorithm

Clean Markdown and AI-readability scoring for any URL. Built for AI agents.

77 installs/wk answering

ProfitCollector

by bakhour

22 pay-per-call developer, security, network and data utilities using x402 on Base.

31 tools answering

Textavia MCP

by catorch

Local-first MCP server for text, JSON, Base64, CSV, regex, and developer utilities.

33 installs/wk local only

Atomic CSS — questions

Answers built from our own checks of this server.

Is Atomic CSS 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 1124 ms. The bar chart above shows every period we have measured.

The registry lists Atomic CSS 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 Atomic CSS?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Atomic CSS need an API key?

No. Atomic CSS completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.