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Patent — entry 004 of 4

USPTO

Verified Jul 2026

USPTO's patent data and query APIs now live under the agency's Open Data Portal (ODP) at data.uspto.gov, a single platform that folded in what used to be the Patent Examination Data System, Bulk Data Storage System, and several Developer Hub services. Every ODP endpoint sits behind api.uspto.gov, requires a free API key tied to a USPTO.gov account, and returns JSON with CORS enabled — confirmed live via an Origin-header probe that got back access-control-allow-origin: * on both the request and its OPTIONS preflight. The stored learning-and-resources page itself has been renamed to a 'Data and statistics' hub that links out to the ODP.

patentsgovernmentusaopen-databulk-data
Visit uspto.gov ↗Read the docs ↗More Patent
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score78out of 100
Authentication15/25API key required
Pricing20/20Free to use
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months

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Scored 78 on greatapis.com
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Auth quickstart

  1. Sign up with the provider to get an API key.
  2. Send it on every request as a headerAuthorization: <key>
  3. The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

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USPTO vs PatentsView

PatentsView, the NBER/USPTO-backed tool for mining trends across the US patent landscape, folded into the USPTO's unified Open Data Portal (ODP) in March 2026, retiring the standalone patentsview.org domain and its old keyless endpoint. Access now runs through ODP's api.uspto.gov gateway, which requires a free API key tied to a USPTO.gov account and returns JSON over HTTPS with CORS enabled. Every patentsview.org URL, including the one previously on file here, now 301-redirects to USPTO's own transition guide rather than serving data directly.

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USPTO vs TIPO

USPTO supports CORS, while TIPO doesn't — pick USPTO for direct browser calls.

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USPTO vs EPO

The European Patent Office's Open Patent Services (OPS) exposes bibliographic, legal-status, full-text, and image data drawn from Espacenet and the European Patent Register through a RESTful, XML-based interface secured with OAuth2 client-credentials. Non-paying registered users get up to 4 GB of data per week for free, with a EUR 2,800 annual subscription available for higher volumes. A live request to the OPS host returned a fair-use-quota rejection while still echoing the requesting Origin in its CORS headers, confirming cross-origin access is genuinely enabled rather than merely documented.

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