Citation Verification MCP Server

by guptaprakhariitr Your server? Claim it

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Citation Verification is listed as active in the registry but did not answer our last check. It exposes 3 tools. Last commit 11 Jun 2026.

Real-time fact-check, citation verification, and source-freshness for AI agents.

Uptime history 48 days of history · worst day 3%

48 days agonow

3.3%

Uptime 24h

3 of 91 checks

Tools

read from the server

220 ms

Response time

average over 24h

Stars

last commit 11 Jun 2026

Citation Verification does not always answer

Over the last week it answered 3.4% 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 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add verification-mcp --transport http https://verification-mcp.atlasword.workers.dev/mcp

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

{
  "mcpServers": {
    "verification-mcp": {
      "url": "https://verification-mcp.atlasword.workers.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.verification-mcp]
url = "https://verification-mcp.atlasword.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "verification-mcp": {
      "url": "https://verification-mcp.atlasword.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "verification-mcp": {
      "url": "https://verification-mcp.atlasword.workers.dev/mcp"
    }
  }
}

Available tools 3

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

cite

cite_check

Verify that one or more cited URLs (a) resolve, (b) match the cited claim text, and (c) aren't retracted. Useful when an LLM produced inline citations and you want to confirm they're real and on-point. Pass DOIs directly (e.g. '10.1038/nature12373') or full URLs. Up to 25 per call.

fact

fact_check

Verify a factual claim against authoritative sources (Wikipedia, Wikidata, Crossref academic citations). Returns a verdict ('supported' / 'contradicted' / 'mixed' / 'unverified'), a 0–1 confidence score, and the list of sources with excerpts. Use this when an agent is about to assert a fact it isn't 100% sure of, or when post-processing LLM output to flag possibly-hallucinated claims.

source

source_freshness

Check whether a source URL is still live and how recently it was modified. Returns the HTTP last-modified header (if present), the most recent Wayback Machine snapshot, and a 'changed_recently' flag (last 90 days). Use this for RAG hygiene — flagging citations that point to pages that may have changed since the agent's training data.

Endpoints

URL	Transport	State	Latency	Checked
https://verification-mcp.atlasword.workers.dev/mcp	streamable-http	answering	146 ms	14 min ago

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Citation Verification — questions

Answers built from our own checks of this server.

What can Citation Verification do?

It exposes 3 tools, read directly from the server on our last check. Among them: cite_check, fact_check, source_freshness. 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 Citation Verification working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 91 checks got a reply (3.3%), average response time 220 ms. The bar chart above shows every period we have measured.

The registry lists Citation Verification 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 Citation Verification?

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 Citation Verification need an API key?

No. Citation Verification completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Citation Verification?

It answers our handshake in 220 ms on average, which is faster than 63% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Citation Verification open source?

We cannot say either way: written in TypeScript and 1 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.