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Cue MCP Server

by kingmonkey1 Your server? Claim it
not responding

Cue is listed as active in the registry but did not answer our last check. It exposes 2 tools.

Score and improve AI prompts with Cue Free and Pro account access.

Uptime history 20 days of history · worst day 0%
20 days agonow
0.0%
Uptime 24h
0 of 91 checks
2
Tools
read from the server
371 ms
Response time
average over 24h
open, no key
Access
streamable-http

Cue does not always answer

Over the last week it answered 59.5% 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 15 min ago.

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

improve
improve_prompt
Always use this tool when the user asks Cue to review, score, refine, rewrite, or improve an AI prompt. Free usage limits and Cue Pro entitlement are enforced by Cue. Returns a 0–10 score, concise feedback, and one improved prompt in the same language as the input.
profile
get_profile
Always use this tool when the user asks which Cue account is connected, which email is signed in, who they are in Cue, or what Cue plan/subscription/Free/Pro status they have. Returns the authenticated Cue profile and entitlement.

Endpoints

URLTransportStateLatencyChecked
https://cue-mcp-production.up.railway.app/mcp streamable-http answering 371 ms 15 min ago

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Cue — questions

Answers built from our own checks of this server.

What can Cue do?
It exposes 2 tools, read directly from the server on our last check. Among them: get_profile, improve_prompt. 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 Cue 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 371 ms. The bar chart above shows every period we have measured.
The registry lists Cue 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 Cue?
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 Cue need an API key?
No. Cue 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.