No-signup link unfurl for AI agents (an agent can't do a signup)

If you write code that calls links — a bot, a crawler, a RAG ingest job, an autonomous agent — you eventually need the metadata behind a URL: title, description, preview image, site name. The annoying part isn't parsing Open Graph tags. It's that almost every managed API that does this for you wants you to sign up first. That requirement is fine for a human. It is a wall for an agent. An autonomous script has no inbox to confirm, no dashboard to click, no card to enter. "Just grab an API key" i...