If your customers can’t use your API, they’ll use your competitors. This means that your API has to be usable and reliable. Testing is a significant key to your API’s success, going beyond unit tests into load and performance testing. It also means having easy to read, accessible documentation, code samples, getting started guides, and developer support. That’s why it’s so important to implement numerous different types of testing at scale, and build out a successful developer ecosystem complete with data analysis and user testing to ensure your consumers are successful.