Callook.info vs Onyx Bazaar

Callook.info is a free, keyless lookup service for FCC-licensed US amateur radio callsigns, returning license status, operator class, name, and registered address as either JSON or XML. A live request for a real callsign returns a wildcard Access-Control-Allow-Origin header with no authentication required, confirming it's safe to call directly from browser code.

Onyx Bazaar is a public leaderboard of x402 pay-per-call HTTP services on Base, Solana, and other chains, refreshed every 15 minutes from Coinbase's CDP discovery API. It ranks listed endpoints by call volume, unique payers, price, and recency, with views for cheapest, newest, and highest-quality services. A keyless JSON endpoint (/bazaar.json) mirrors the same leaderboard data shown on the page for agents that want to query it directly.