CitedBy
OfficialChecks whether Googlebot and Google-Extended are allowed by a site's robots.txt and whether the server responds to them, helping determine if Google search and Google's AI-related crawler can access the site.
Checks whether PerplexityBot is allowed by a site's robots.txt and whether the server responds to it, helping determine if Perplexity's crawler can access and cite the site.
This server has a remotely hosted endpoint. Open its connector listing for connection details, authentication requirements, and setup instructions:
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 |
| 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. |
| For GPTBot, OAI-SearchBot, ChatGPT-User, PerplexityBot, ClaudeBot, Google-Extended, Bingbot and Googlebot: allowed by robots.txt, and answered by the server, or not. |
| Whether |
| 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.
Related MCP server: Agundur GEO Scanner
Install
Claude Code
claude mcp add --transport http citedby https://citedby.eu/mcpor install the plugin, which also adds a skill that picks the right tool for the question:
/plugin marketplace add resaleiq/citedby-mcp
/plugin install citedby@citedbyClaude 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:
{ "mcpServers": { "citedby": { "url": "https://citedby.eu/mcp" } } }Codex
codex mcp add citedby --url https://citedby.eu/mcpAny 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: hello@citedby.eu. MIT licence.
Tool Schema Changelog
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Maintenance
Related MCP Connectors
Free AI crawler, schema, llms.txt and answer-readiness checks for public web pages. No API key.
Checks whether a website is readable and citable by AI systems (ChatGPT, Claude, Perplexity, etc.)
Free, no signup: AI crawler check, llms.txt validator, ChatGPT/Perplexity/Gemini citation check.
Check which AI crawlers a site allows and see pages the way AI crawlers do. Free, read-only.
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