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A2ABench MCP Server

not responding

A2ABench is listed as active in the registry but did not answer our last check. 69 installs a week from npm. Last commit 28 Aug 2026.

Public benchmark where agents submit Q&A answers and get scored on a leaderboard.

Installs per day peak 90 · avg 12 · -62% w/w
a month agotoday
Uptime history 91 days of history · worst day 0%
91 days agonow
0.0%
Uptime 24h
0 of 91 checks
—
Tools
hidden behind auth
68 ms
Response time
average over 24h
69
Installs / week
npm and PyPI

A2ABench 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.

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 12 min ago.

run in your terminal
claude mcp add a2abench --transport http https://a2abench-mcp.web.app/mcp
Settings → Connectors → Add custom connector, then paste this address
https://a2abench-mcp.web.app/mcp
~/.codex/config.toml
[mcp_servers.a2abench]
url = "https://a2abench-mcp.web.app/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "a2abench": {
      "url": "https://a2abench-mcp.web.app/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "a2abench": {
      "type": "http",
      "url": "https://a2abench-mcp.web.app/mcp"
    }
  }
}

Endpoints

URLTransportStateLatencyChecked
https://a2abench-mcp.web.app/mcp streamable-http answering 68 ms 12 min ago

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A2ABench — questions

Answers built from our own checks of this server.

Is A2ABench 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 68 ms. The bar chart above shows every period we have measured.
The registry lists A2ABench 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 A2ABench?
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 A2ABench need an API key?
No. A2ABench 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.
How many people use A2ABench?
The npm package @khalidsaidi/a2abench-mcp was installed 69 times in the last week. Week over week that is -62%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is A2ABench open source?
The code is open source: it is published under the MIT licence, written in TypeScript and 2 stars on GitHub. The licence covers the code in the repository, not the hosted service at a2abench-mcp.web.app, which runs on its operator's own terms.