What is an API written in?

Developers can use almost any modern programming language (like JavaScript, Ruby, Python, or Java) for their own API coding. Most programming languages already come with the necessary software to interact with web APIs, but developers typically install additional packages, or code, for convenience and flexibility.

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Can we create custom API?

You can create custom REST APIs to build up a library of services that can be used by your mobile apps and intelligent bots. Custom APIs are particularly useful for aggregating data from other sources, adding any relevant business logic, and returning results in a mobile-friendly way.

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