Harvard University (Cambridge, MA; founded 1636) maintains a public developer footprint including the Harvard Art Museums API, the Harvard Library LibraryCloud Open Metadata API, the DASH OAI-PMH repository, and the HUIT API Portal.
REST/JSON API to the Harvard Art Museums' collections data across 21 resources, with IIIF image services.
Harvard Library LibraryCloud API (Open Metadata)
Open metadata hub aggregating Harvard bibliographic metadata returning normalized MODS or Dublin Core.
OAI-PMH 2.0 metadata harvesting endpoint for the DASH open-access institutional repository.
HUIT's central catalog of HarvardKey-gated administrative APIs (Courses, Person, Dining, Zoom, Library Catalog).