Yale API Portal — Portal APIs
Yale's institution-operated developer portal documents four Portal APIs — Buildings (name and location of Yale campus buildings), Courses, Course Subjects and GatewayServiceMetrics. Yale's own page calls these INTERNAL APIs: a key is issued only after registering an application in the Developer Portal, and portal access requires a valid Yale NetID. The gateway is live — an anonymous call to the Courses Web Service v3 returned HTTP 400 with the body "Invalid API Key" — but no operation here is publicly callable, so no contract is claimed for it.