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When beginners start learning APIs , they usually think there’s only one kind:

“Send a request → Get a response.”

But in reality, there are multiple types of APIs , each built for different purposes — speed , flexibility , security , or simplicity .

In this guide, you’ll learn the main types of APIs with simple explanations, code examples, and real-world use cases.

🧠 What is an API? (Quick Recap)

An API (Application Programming Interface) is a set of rules that allows different software systems to communicate with each other.

One system sends a request → another system processes it → and returns a response .

The style and protocol of this communication decide the type of API .

🔹 Main Types of APIs by Architecture Style

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