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APIs for Scholarly Resources

A list of commonly-used APIs for scholarly resources

Unpaywall REST API

Provides free, programmatic access to the database that contains open access contents from over 50,000 publishers and repositories.


Requests must include your email as a parameter at the end of the URL, like this:

Return Format

The API return results in JSON format. The data schema is available here.


  • Limit use to 100,000 calls per day.
  • If you need to work with a larger dataset, Unpaywall recommends downloading the entire database snapshot for faster local access.  

Useful Links