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OverlayQA MCP Server

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OverlayQA is answering right now. Last checked 6 min ago. 481 installs a week from npm. Last commit 23 Oct 2026.

Run accessibility, contrast, and design token audits and file QA issues from your AI coding tool.

Installs per day peak 216 · avg 33 · +298% w/w
a month agotoday
Uptime history 12 days of history · worst day 99%
12 days agonow
100.0%
Uptime 24h
91 of 91 checks
—
Tools
hidden behind auth
338 ms
Response time
average over 24h
481
Installs / week
npm and PyPI

Nothing serious here today

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

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 6 min ago.

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

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URLTransportStateLatencyChecked
https://api.overlayqa.com/mcp streamable-http sign-in 313 ms 6 min ago

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OverlayQA — questions

Answers built from our own checks of this server.

Why is there no tool list for OverlayQA?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is OverlayQA 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 338 ms. The bar chart above shows every period we have measured.
How do I connect OverlayQA?
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. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to OverlayQA?
No API key is involved. OverlayQA answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is OverlayQA?
It answers our handshake in 338 ms on average, which is faster than 43% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use OverlayQA?
The npm package @overlayqa/mcp was installed 481 times in the last week. Week over week that is +298%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is OverlayQA open source?
The code is open source: it is published under the MIT licence, written in HTML and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at api.overlayqa.com, which runs on its operator's own terms.