CitedBy
Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.
Installation
Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).
claude mcp add --transport http citedby 'https://citedby.eu/mcp'{
"mcpServers": {
"citedby": {
"type": "http",
"url": "https://citedby.eu/mcp"
}
}
}Documentation
Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.
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
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.
Also from CitedBy: citedby-check, the same AI-crawler check as a command-line tool and GitHub Action.
Questions: hello@citedby.eu. MIT licence.
Questions fréquentes
Qu'est-ce que CitedBy ?
Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.
Comment installer CitedBy ?
Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport http citedby 'https://citedby.eu/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.
Faut-il une clé API pour CitedBy ?
Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.
CitedBy est-il open source ?
Oui. Son code est sur GitHub sous licence MIT.
Qui maintient CitedBy ?
Il est publié par resaleiq. AI.tn le référence sans le maintenir ni le recommander.
Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.