APIs 10

Programmatic access to patent databases and search engines

EPO Open Patent Services (OPS)

Free
Official EPO REST API giving programmatic access to structured patent data from EPO, WIPO via INPADOC, and many national patent offices.

USPTO Open Data APIs

Free
Collection of REST APIs for searching all patent application bibliographic data, continuity, assignments, and file wrapper documents, refreshed daily.

Lens.org API

Free for researchers
Programmatic access to one of the world’s largest open collections of patent and scholarly data covering over 140 million patent records across global jurisdictions.

Google Patents Public Data

Free tier
Largest publicly available patent corpus accessible via BigQuery covering patents from 100+ countries.

PatentsView API

Free
USPTO-supported research API for US patent data with inventor disambiguation and structured access, now migrated to USPTO Open Data Portal.

WIPO PATENTSCOPE API

Free
WIPO’s international patent search covering PCT applications and national collections across 100+ countries.

PQAI API

Free tier
Semantic prior art search API using dense retrieval over a global patent corpus. Purpose-built for AI-powered patent search.

Free Patents Online API

Free
Simple patent search and retrieval API covering US and international patents, good for basic lookups.

SerpAPI Google Patents

Paid
Programmatic access to Google Patents search results, useful for rapid prototyping and cross-referencing.

Derwent Innovation API

Paid
Clarivate’s enterprise patent intelligence API with deep analytics, citation data, and global coverage.
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    Subject: Letter of Support for PQAI

    Dear PQAI Team,

    We are pleased to express our support for PQAI and its mission to revolutionize patent searching through open-source, AI-driven solutions.

    At [COMPANY NAME], we recognize the importance of accessible and efficient patent tools in fostering innovation and empowering inventors from diverse backgrounds. By supporting PQAI, we aim to contribute to the development of transparent, collaborative, and impactful solutions for the intellectual property community.

    We kindly request the addition of [COMPANY NAME] to the official List of Supporters of PQAI.

    Sincerely,

    [CEO or Equivalent Name]
    [Title]
    [Company Name]
    [Signature]