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Patent
PatentRef API
Not rated yet · Be the first to rate itPatentsView-compatible API for US patent grants since 1976: claims, citations, CPC, fee status.
PatentRef API is a free Patent API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
- Authentication
- apiKey
- HTTPS
- Yes
- CORS
- Yes
- Category
- Patent
- Uptime (30 days)
- 100%
Visit documentation ↗patentref.io
Online · 1166 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
About PatentRef API docs: a PatentsView-compatible US patent API
Docs for the PatentRef API, which answers the PatentSearch v1 grammar of PatentsView from its own snapshot of USPTO patent data.
- Provider
- PatentRef API docs: a PatentsView-compatible US patent API
- Website
- patentref.io ↗
Details from patentref.io.
Key facts
- 100% uptime (30 days)
- Callable from the browser (CORS)
- HTTPS
Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
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PatentRef API alternatives
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PatentsView
API is intended to explore and visualize trends/patterns across the US innovation landscape
No authHTTPSCORS ?
OAuthHTTPSCORS ?
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PatentRef API FAQ
Who provides the PatentRef API?
The PatentRef API is provided by PatentRef API docs: a PatentsView-compatible US patent API (patentref.io). Docs for the PatentRef API, which answers the PatentSearch v1 grammar of PatentsView from its own snapshot of USPTO patent data.
Is the PatentRef API free?
Yes. The PatentRef API is listed in the Patent category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Does the PatentRef API require an API key?
Yes. The PatentRef API uses apiKey authentication, so you need to register for credentials before making requests.
Can I call the PatentRef API from the browser?
Yes. The PatentRef API supports CORS, so front-end JavaScript can call it directly.
Does the PatentRef API support HTTPS?
Yes. The PatentRef API is served over HTTPS, so it's safe to use in production.
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