API load testing is a process of simulating multiple users sending requests to your application servers simultaneously to test your application's performance and stability under heavy load. Load testing is an integral part of capacity planning and can help ensure that a system can handle the expected traffic levels when it goes live.
There are several methods to do load testing, but API load testing is one of the simplest and most efficient approaches. That's because it's easy to code up and there are a plethora of open-source tools available for generating and executing your scripts. But running and managing load tests, or any API testing in general can be challenging. Tools like Testkube help automate and simplify testing workflows by orders of magnitude.
The majority of software professionals understand the importance of end to end testing, from Front-End, to APIs, to Back-end. However, in the world of Kubernetes and microservices, API testing is arguably the most critical path. Even if the end-user application appears to be working without a hitch, there could be critical business and cybersecurity issues beneath the surface. It's always a good idea to perform validation through both the API and the UI in order to verify that your software is returning what it should.