Springer is a global scientific publisher of scientific books and journals. Springer Open Access API provide access to the full-text content, metadata, and images for approximately 80 thousand articles from open access journals in the Biomed Central and SpringerOpen publishing programs. Springer APIs provide a variety of different output formats, including XML and JSON (and we're working on ONIX).
Springer is one of the leading publishers of scientific books and journals. It has had an OpenAccess API , and it has also sponsored API contests around the same. Three kinds of APIs are available by Springer.