Goodreads.com API affords to get books on a shelf, get members' updates, and get reviews by ISBN. The Goodreads.com C# library created by Jason Kulatunga includes client example, installation, and API reference. The author uses it to authenticate and integrate with QuietThyme.com. For more information, contact email@example.com
Microsoft uses docs.microsoft.com as its single repository for all API docs, reference material, code samples, and other developer resources. Microsoft has updated the repository with two new features (REST API Browser and Try It) to help developers easily find relevant APIs test APIs.
U.S. National Library of Medicine, which is part of the National Institutes of Health, maintains a database of over 8,500 records relating to other organizations and sources of reference material on the topic of health and medicine. This “Directory of Information Resources Online” is aptly named DIRLINE. The DIRLINE API allows you to search this niche data collection from your webpage or app.
The Open Library is a project of the non-profit Internet Archive, whose long-term goal is to present "one web page for every book ever published." A recent release of the Open Library brought the total number of book records to over 13.4 million (including over 234,000 records with full-text for the book).