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Instructor: Okay, so now we understand

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why do we need API,

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but why do we need a well-designed API?

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What is the point of having a best practices for API

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and having a complete course

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about how to design a really, really good API?

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Well, the reason is quite simple.

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You always need to remember that the developers

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who are using your API are actually customers.

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Whether they actually pay for the API

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or they just use it freely,

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they are still customers.

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And as customers, they do have alternatives.

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You are probably not the only one

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to offer these kinds of data and services from your API

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and you probably have some kind of competition.

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In order to win the competition

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and win the hearts of the developers and clients,

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your API should be easy to use and consistent

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because if the developers will have hard time

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understanding what exactly is going on in the API

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and how to use it and why for specific services

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the API looks like this

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and for other services the API looks like that,

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then they will simply won't use it

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and they will go to the competition

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and you don't want that to happen.

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In addition, satisfied customers equal less support call.

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You don't want to spend all your time and money

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on support centers answering questions from angry developers

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who simply don't understand what is going on

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and why simple things suddenly stopped working.

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So, in order to get satisfied customers

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and a lot of customers

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and to win the hearts and money

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of the developers and customers,

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you must have a well-designed and easy-to-use API.