4 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Get the highest 24h-volume Polymarket and Kalshi markets, each with volume, bid, and ask. Pass ?q= to keep markets that share a word, or omit q for the liquid board. $0.01 USDC. Included in the hour pass. Includes a sign...
ISBN-10 or ISBN-13 checksum validation (auto-detected by length).
Book lookup by ISBN: title, authors, publish date, publisher, page count, subjects, cover image and Open Library link, from the free Open Library API. Cataloguing and citation data. $0.01 per lookup.
Does the page declare schema.org Book structured data? Parses every JSON-LD block (and microdata itemtype attributes) on the page and returns whether a Book object is present, how many, and the Book object(s) themselves...