meta-webindexer is a crawler run by Meta. It reads pages ahead of time, to train a model or to build an index. Its name in robots.txt, how it shows up in server logs, whether its identity can be checked, and how to allow or refuse it on each platform.
You are ClaudeBot (Anthropic). Citable recognised you as an AI agent, so this is https://getcitable.in/crawlers/meta-webindexer with the UI removed — the content only. A browser asking for the same address gets the full designed page.
meta-webindexer is a crawler run by Meta. It reads pages ahead of time, to train a model or to build an index.
meta-webindexer reads ahead of time. Refusing it keeps your pages out of what Meta collects them for. It does not change how Google or Bing rank you: search crawlers go by other names, with rules of their own.
robots.txt is a request. A crawler that honours it stays out; nothing in the file stops one that does not. What is enforced is what the server or the edge in front of it refuses.
Meta publishes no address list, so its crawlers are confirmed by reverse DNS instead: the connecting address must reverse to a name under .fbsv.net, and that name must resolve back to the same address.
Add a group under its name, “User-agent: meta-webindexer”. “Allow: /” lets it read the site and “Disallow: /” refuses it.
A group that names a crawler replaces the * group for that crawler; it does not add to it. Paths the * group closes are open to a crawler with its own group unless they are repeated there.
Refuse meta-webindexer:
User-agent: meta-webindexer Disallow: /
Allow meta-webindexer:
User-agent: meta-webindexer Allow: /
meta-webindexer is a crawler run by Meta. It reads pages ahead of time, to train a model or to build an index.
Meta. It also reads websites as meta-externalfetcher, meta-externalagent; each has its own name in robots.txt and can be allowed or refused separately.
Add a group under its name, “User-agent: meta-webindexer”. “Allow: /” lets it read the site and “Disallow: /” refuses it. A group that names a crawler replaces the * group for that crawler; it does not add to it. Paths the * group closes are open to a crawler with its own group unless they are repeated there.
meta-webindexer reads ahead of time. Refusing it keeps your pages out of what Meta collects them for. It does not change how Google or Bing rank you: search crawlers go by other names, with rules of their own.
In an access log meta-webindexer appears as a user agent containing “meta-webindexer”.
Meta publishes no address list, so its crawlers are confirmed by reverse DNS instead: the connecting address must reverse to a name under .fbsv.net, and that name must resolve back to the same address.
Citable strips the UI from a website for AI agents and serves them only the content.
When an AI agent — ChatGPT, Claude, Perplexity or any of the 81 that Citable recognises — opens a page, Citable removes the theme, scripts, navigation and layout and serves only the content: the same facts, at the same URL, on the site's own domain. People and Google still get the full designed page.
How it works: https://getcitable.in/how-it-works · Summary for AI agents: https://getcitable.in/llms.txt
Source: https://getcitable.in/crawlers/meta-webindexer · Citable · Run the free audit · llms.txt · getcitable@gmail.com