CitedBy

eu.citedbyPublished by citedby.euOfficial publisherv1.0.0Updated Oct 24, 2026

Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.

VerifiedStreamable HTTPWeb executableWeb Search & Scraping Developer Tools

Server details

Identifier: eu.citedby/citedby
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Oct 24, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to citedby.eu, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

Add a badge to your README

Show readers this MCP server is listed on SourceWeft. The badge links to this page.

[![Listed on SourceWeft](https://sourceweft.com/badge/mcp/eu.citedby%2Fcitedby.svg)](https://sourceweft.com/mcp/eu.citedby%2Fcitedby?utm_source=readme&utm_medium=badge)

Overview

AI-generated overview

CitedBy is a free, read-only remote MCP server that checks whether a website can be found and cited by AI assistants and search engines.

What you can do: Check a single page for SEO and AI-answer issues, with the reason and exact fix for each finding
Test whether robots.txt and the server allow named AI crawlers such as GPTBot, PerplexityBot and ClaudeBot
Check whether a site has a working /llms.txt and /llms-full.txt, with a draft when none exists
Report how many domains link to a domain and the strongest referrers, from Common Crawl data
When to use it: Useful when auditing or improving a site's visibility to AI assistants and search engines, or when answering questions about crawler access, llms.txt and backlinks for a domain.
Requirements: Remote Streamable HTTP endpoint at citedby.eu/mcp; no account, sign-in, API key or local runtime needed. Rate limited to 40 checks per hour per address, with results reused for up to 6 hours (1 hour for page checks).

Before you install

Read-only and free, but it fetches public pages and robots.txt as its own crawler, so the target site sees those requests. Whole-site audits and higher page limits require a paid plan on the provider's site. Backlink data covers only domains with 100 or more referring domains under .eu, EU and UK country domains plus the 5,000 most-linked sites.

Installation

In SourceWeft

Open CitedBy in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/eu.citedby%2Fcitedby/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "citedby": {
      "type": "http",
      "url": "https://citedby.eu/mcp"
    }
  }
}

README

CitedBy MCP server

Ask your AI tool to check whether a website can be found and cited by AI assistants and search engines. Free, no account, read-only.

Server address: https://citedby.eu/mcp (MCP Streamable HTTP, no sign-in). Page with the same instructions: https://citedby.eu/mcp-server

Tools

Tool	What you get
`check_page`	One page, fetched as CitedBot (robots.txt respected): what is wrong for AI answers and search, each finding with why it matters and the exact fix. Deterministic checks only.
`check_ai_crawler_access`	For GPTBot, OAI-SearchBot, ChatGPT-User, PerplexityBot, ClaudeBot, Google-Extended, Bingbot and Googlebot: allowed by robots.txt, and answered by the server, or not.
`check_llms_txt`	Whether `/llms.txt` exists, whether its links work, whether `/llms-full.txt` exists.
`backlinks`	How many domains link to a domain, and the strongest ones, from the Common Crawl web graph. Says when a domain is not in the data.

When a site refuses the crawler or does not answer, the tool says so. It does not score what it could not read.

Install

Claude Code

or install the plugin, which also adds a skill that picks the right tool for the question:

Claude on the web and desktop: Settings, Connectors, Add custom connector, paste https://citedby.eu/mcp.

Cursor: add CitedBy to Cursor, or add to ~/.cursor/mcp.json:

Codex

Any other MCP client: add a remote server with the address above.

Ask it like this

"Check https://example.com/pricing with CitedBy and tell me what to fix first."
"Can GPTBot and PerplexityBot read example.com?"
"Does example.com have a working llms.txt?"
"Which domains link to example.com?"

Limits

40 checks an hour from one address; a result is reused for up to 6 hours (1 hour for a page check). check_page is one page. A whole-site audit, with every page up to your plan's limit and the exact fix for each, is at https://citedby.eu/plans.

Check your own site in the browser, free, no account (up to 10 pages): https://citedby.eu/?utm_source=github&utm_medium=referral&utm_campaign=citedby_202611&utm_content=mcp_readme

Also from CitedBy: citedby-check, the same AI-crawler check as a command-line tool and GitHub Action.

Questions: [email protected]. MIT licence.

Source: README.md at commit f97d120

Tools

check_page

Check one page for AI-search and SEO problems

Fetch one public web page as CitedBot (robots.txt respected) and return what is wrong with it for AI answers and search: title, description, headings, structured data, canonical, language, links and more. Each finding has why it matters and the exact fix. Deterministic checks only; says so when the page cannot be fetched.

Parametersurlrequired

check_ai_crawler_access

Which AI crawlers can read this site

Read a site's robots.txt and test the server for GPTBot, OAI-SearchBot, ChatGPT-User, PerplexityBot, ClaudeBot, Google-Extended, Bingbot and Googlebot. Returns, per crawler, whether robots.txt allows it and whether the server answers it, so you can see who is blocked and by what.

Parameterssiterequired

check_llms_txt

Check a site's llms.txt

Fetch /llms.txt of a site and report whether it exists, whether its links work, and whether /llms-full.txt exists. When there is none, the full report holds a draft built from the site's own pages.

Parameterssiterequired

backlinks

Referring domains of a domain (open data)

How many other domains link to a domain, and the strongest referrers, from the Common Crawl domain web graph. Covers domains with 100 or more referring domains under .eu, EU and UK country domains, plus the 5,000 most-linked sites; says plainly when a domain is not in the data.

Parametersdomainrequired

Version history

v1.0.0LatestOct 24, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
License10 pts