Pricing varies depending on the API. All of the APIs in this collection are free or freemium. Freemium APIs give you a limited number of free calls, and then require a paid subscription for a higher volume.
API stands for Application Programming Interface. APIs act like building blocks, and allow you to create applications much faster. It is more efficient and convenient to use the capabilities of one of the APIs than to try to independently implement similar functionality. See a simple API example here.
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