Apple crawlers

Apple operates 2 crawlers that may reach your site. They do different jobs, so a single blanket rule for all of them is almost always the wrong call.

User-agentTypeWhat it does
ApplebotSearchBuilds the index an assistant searches when it answers.
Applebot-ExtendedTrainingCollects pages to train future models.

What blocking each one costs

Search
Blocking removes you from answers happening right now.
Training
Blocking costs nothing today, but means the next model has never heard of you.

robots.txt

To let every Apple crawler through:

User-agent: Applebot
Allow: /

User-agent: Applebot-Extended
Allow: /

To block all of them:

User-agent: Applebot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

robots.txt is honoured voluntarily. It is the right way to state your intent, and it is not an access control — treat anything you genuinely need kept out as needing authentication.

Sources

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