Where can I get best Dell boomi API tutorial?

The Dell Boomi AtomSphere API can be complex and time consuming to learn, but fortunately, there is plenty of educational material available online. The official Dell Boomi AtomSphere website provides the AtomSphere API Guide & Reference, which is a comprehensive guide to help developers get up to speed with the API. Additionally, there are a number of third-party resources available to help developers master the AtomSphere API, such as tutorials, webinars, and video courses from services like IBM Bluemix. Finally, there are a number of developer forums where experienced Dell Boomi users can share insights and answer questions.