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An API is simply how apps talk to each other.
Request → Response → Data.
But not all APIs are built the same 👇
1. REST
The most common API style using HTTP requests.
Simple & widely used
Limitation: You often get too much data (overfetching) or too little (underfetching)
2. GraphQL
Lets clients request exactly the data they need.
No over/under fetching
Limitation: Can get complex & harder to scale properly
3. WebSockets
Real-time, two-way communication between client & server.
Perfect for chats, live updates
Limitation: Harder to manage at scale
4. gRPC
High-performance APIs using Protocol Buffers.
Super fast & efficient
Limitation: Not browser-friendly, harder to debug
5. Webhooks
Server sends data automatically when an event happens.
No need to constantly request data
Limitation: You don’t control when data comes (event-driven only)
Understand when to use what, because that’s what actually gets tested.
These cover 80% of the most popular api types, but there are more like SOAP, MQTT.. which are used based on company requirements.
Follow for more!
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@vishakha.sadhwani
