USPTO
FreeUntestedOur check runs without a key, so we couldn't test this one. It doesn't mean it's down.
US patent and trademark filings, examination status, PTAB decisions, and ownership assignment records.
Free tier, in plain English
Free with a USPTO-issued API key; no published rate limit was found.
Alternatives in Open Government Data
API ColombiaColombia reference data: departments, cities, tourist sites, airports, presidents and more.api.data.govOne free key unlocks 450+ US federal agency APIs (NASA, NOAA, FDA, and more).FreeApiverketSingle API for 35+ Swedish agencies: weather, statistics, transport, companies, parliament and more.FreemiumArgentinaDatosArgentine holidays, inflation, interest rates, and Congress voting data from public sources.FreeAyes and NoesUK MPs, parties, Commons voting records and Early Day Motions, built on official Parliament data.Free