web https://openlibrary.org/developers/api http://openlibrary.org/developers/api http://openlibrary.org/developers/api diverse Schnittstellen (API) RESTful API OpenLibrary API http://openlibrary.org/developers/api https://openlibrary.org/developers/api OpenLibrary API https://openlibrary.org/developers/api Go! Developers / API