An Application Programming Interface (API) allows individual programs to communicate with each other directly and use each different function. An API is a window onto facts and capability within an organization. It allows developers to write applications that engage with backend systems. 10 best API management tools 1. Apigee Apigee is one of the best API Management tools out there for partner apps, cloud apps, consumer apps, systems of record, and IoT. With software solutions, you can design, analyze, scale, and secure APIs. Some of its features include: It helps to deliver the solution in the form of proxy, hybrid, or agent. It makes it easy for developers to apply information and equipment to build new cloud-primarily based apps. It has four pricing plans – Standard, Evaluation, Enterprise, and Enterprise Plus. The Evaluation plan is free. For opportunity, you need to contact the team.