Integrating ZoomInfo as a Data Provider | HTTP API Guide, Best Practices & Efficiency Optimization

I am seeking guidance on integrating ZoomInfo as a data provider through an HTTP API. Specifically, I have a few questions:

Is there a comprehensive guide or documentation available for adding ZoomInfo as a provider via HTTP API?
What strategies or best practices do you recommend for handling the initial authentication call effectively?
How can I ensure that I make only one API call for both phone number and email address retrieval to optimize efficiency?

Thank you for your assistance!