For technical SEO & metadata indexing: Extracts live, rich structured metadata from your URL (headers, redirects, favicons, title, description, canonical, meta tags, Open Graph, JSON-LD, etc). Returns everything by default; query params narrow response (pass atomic field names, ex: ?fields=title,description or named groups: network,meta,og,twitter). ?omitEmpty=true trims tokens for AI agents. Obeys robots.txt. Supports GET & POST