@abbe98
Are you saying the no-cost access via WMCS and/or via the API's website "doesn't work" in a literal sense (broken) or is inadequate (intellectually)?
Are you saying the documentation here https://enterprise.wikimedia.com/docs/ is insufficiently detailed? what would you like more detail about?
So far we've not had any community user express any specific use case that they've been unable to fulfil. Please bring any specifics to the talkpage (or phabricator).
Wikimedia Enterprise API Documentation Portal

Guides and reference documentation to get started, understand, and troubleshoot using Wikimedia Enterprise APIs. Includes code snippets and examples.

Wikimedia Enterprise