claude.ai

What it is

Anthropic's Claude assistant on the web.

Why there's no full URL

Browsers share only the origin cross-site by default, so the chat URL isn't passed on.

What traffic it represents

Clicks on links to your site that Claude cited or shared in a chat.

In Vireo

Vireo recognises this referrer as Claude and counts these visits on the AI assistants card, next to the pages AI crawlers took from your site. It works on history you've already collected, not only from the day you install. See how it looks.

Sources

Visit claude.ai to chat with Claude in a web browser.

What is Claude? - Claude Help Center

For cross-origin requests send the origin (only) when the protocol security level stays same (HTTPS→HTTPS).

Referrer-Policy header - MDN

With this policy, only the origin is sent in the Referer header of cross-origin requests.

A new default Referrer-Policy for Chrome: strict-origin-when-cross-origin