node-journalTOCs is a very simple Node.js client for the JournalTOCs API that exposes methods for searching journals by keyword or ISSN and retrieving articles by journal ISSN. The library is Copyrighted by the Shuttleworth Foundation, written by Richard Smith-Unna Licensed under the MIT license.
SEOmoz, a leader in SEO software, has offered link intelligence APIs for a few years (Mozscape being the latest). Although Mozscape has garnered high adoption rates (over 10 million requests/day), customer feedback uncovered shortcomings. SEOmoz now knows that 10 requests/second and a max of 50 URLs/batch "is not able to support everyone's use case." Accordingly, SEOmoz enhanced Mozscape API capabilities and is currently in beta. Although the beta is in its early stages, throughput has increased 400%.
At the time of this writing, there are 197 APIs listed in the Education Category of the ProgrammableWeb API Directory. A few of the leading APIs in this category include Khan Academy, Edmodo and Schoology.
Google announced a number of enhancements to its Google Classroom tool. Among the enhancements are API updates that streamline integration with third party apps. Now, third party apps can add and modify student coursework. This brings native Classwork functions to 3rd party apps.