TechDirect APIs

This might sound like a very basic question, but is there any TechDirect API Reference documentation. I'm not looking for information on how to use an API, just the details of the TechDirect endpoints, parameters, etc. An hour of Googling and all I've found is one Reddit thread with a PowerShell script for querying warranty status for a particular service tag.

Apologies if this is the correct board; it was the most relevant I could find.