OpenDOAR is an authoritative directory of academic open access repositories. Each OpenDOAR repository has been vetted by project staff to ensure that the information that is recorded there is authoritative and supported over the long term.

As well as providing a simple repository list, OpenDOAR provides a search interface for finding repositories as well as the contents within that repository. OpenDOAR also provides tools and support to both repository administrators and service providers in sharing best practice and improving the quality of repository infrastructure.