Positive and welcoming business name that includes the acronym API ("Application Programming interface").
The name "heyapi" has only six letters and just two syllables. Two-syllable names are exceptionally rare and very valued. Successful brands using two syllable names include Subway, Pocket and Apple.
Heyapi.com is a dot com domain. Dot com domains are the most sought after domain extension in the world, famously used by websites like google.com. A dot com is the first thing people think of when they think of a website.