The Erply C# SDK by Erply is available for download fro the official site. It allows API interaction to access inventory, products, customers, webstore, management, documents, and reports. Requests and responses available in HTTP/POST and JSON/XML respectively.
This part of the API Testing Series looks at API Science, an API monitoring and reporting tool that's set up in an environment to collect information and alert users when something happens. Rather than being a tool for users to interact with an API directly, API Science allows them to observe.