Which APIs have an llms.txt?

llms.txt is a plain-markdown index at the root of a docs domain that tells AI agents which pages matter and in what order. Agents work inside finite context windows; a focused llms.txt is the difference between an agent loading your three canonical guides and giving up on a 400-page docs site.

Discry checks for a fetchable llms.txt on the docs domain via plain HTTP — the same way most agents fetch it, with no JavaScript execution.