The API offers a number of solutions that make SaaS services so easy. Want to automatically set your customer's location? There's an API fo that. Want to automatically load public holidays in your customers' locations? There's an API for that. Simple sandbox to use on the website and the API is straightforward to implement into a web application.

It has a perfect on-demand validation service with API calls and bulk uploads. Easy to implement and integrate the API. Great customer support. Im using it daily on automation through make.com and zapier.com

Abstract is really fast to query data from the APIs and easy to use. They have integration with several platforms and support many pogramming languages.