What is deep search?
Deep search runs a query, then reads the top matches platform-aware in a real browser and returns cleaned content. Because that read is real browser work rather than a fetch, it is asynchronous: the call returns a job id and the result is collected by polling or a webhook.
Why it matters
A ranking tells an agent where to look; it does not tell it what is there. Deep search closes that gap in one call, and does it asynchronously so a multi-page read does not have to fit inside a request timeout.