Iron/Out UX Score Benchmark MCP Server

by iron-out Your server? Claim it

answering

Iron/Out UX Score Benchmark is answering right now. Last checked 11 min ago. It exposes 2 tools.

UX Score and Web Vitals (TTFB, FCP, LCP, INP, CLS) for any website, from real-user CrUX data.

Uptime history 9 days of history

9 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

871 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Iron/Out UX Score Benchmark every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ux-benchmark --transport http https://www.iron-out.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://www.iron-out.io/mcp

~/.codex/config.toml

[mcp_servers.ux-benchmark]
url = "https://www.iron-out.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "ux-benchmark": {
      "url": "https://www.iron-out.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "ux-benchmark": {
      "type": "http",
      "url": "https://www.iron-out.io/mcp"
    }
  }
}

Available tools 2

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

benchmark

run_ux_benchmark

Returns the Iron/Out UX Score (0 to 100) for one website, using real-user Chrome UX Report (CrUX) data from the last 28 days. The score is built on five Web Vitals: TTFB (10%), FCP (15%), LCP (25%), INP (25%) and CLS (25%). Use this when the user asks how fast or user-friendly a site is for real visitors. It does not run a lab test or Lighthouse and does not load the site. Sites with too little Chrome traffic have no CrUX data and return no score. If a monthly revenue band is given, it also estimates the revenue at stake. Returns a summary and a link to the full report.

compare

compare_sites

Compares the Iron/Out UX Score of 2 to 5 websites side by side, using real-user Chrome UX Report (CrUX) data from the last 28 days (Web Vitals: TTFB, FCP, LCP, INP, CLS). Use this for competitor or sector comparisons. It runs no lab test or Lighthouse. Returns a ranking and a link to the full comparison.

Endpoints

URL	Transport	State	Latency	Checked
https://www.iron-out.io/mcp	streamable-http	answering	478 ms	11 min ago

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Iron/Out UX Score Benchmark — questions

Answers built from our own checks of this server.

What can Iron/Out UX Score Benchmark do?

It exposes 2 tools, read directly from the server on our last check. Among them: compare_sites, run_ux_benchmark. 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 Iron/Out UX Score Benchmark working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 871 ms. The bar chart above shows every period we have measured.

How do I connect Iron/Out UX Score Benchmark?

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 Iron/Out UX Score Benchmark need an API key?

No. Iron/Out UX Score Benchmark completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Iron/Out UX Score Benchmark?

It answers our handshake in 871 ms on average, which is faster than 7% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.