Metadata for Libraries and Aggregators

Metadata feeds

OAPEN enables libraries and aggregators to use the metadata of all available titles in the OAPEN Library. The metadata is available in the following formats:

MARC21 metadata provided by Penn State University Libraries

Penn State University Libraries provides MARC21 records created from metadata supplied by OAPEN. There are three files:

  • CC-licenced titles
  • “Free-to-read” titles
  • Titles where only a limited number of chapters are available in OAPEN

Download the data here:

OAI PMH harvesting

The base URL for OAI-PMH harvesting is


There are several metadata formats available. The xoai format lists all metadata fields, see


RSS and Atom feeds

All metadata feeds are available under a CC0 1.0 license.

Selective Export

It is also possible to make use of our ‘Selective Export’ functionality. This enables you to export metadata in a flexible way: first by selecting the relevant titles and secondly by choosing the export format. The selective export functionality makes it easier for specialist libraries, subject repositories and frequent users to only retrieve specified subsets of open access books according to their preferences - for instance by publisher or subject field. Please be aware that this export function is optimised for sets up to 500 titles. More information can be found here