Anyone automating onboarding with ADP? What tools are you using?

Been looking for a better way to handle integration between AD and ADP. We use ManageEngine/ADMP, which purports to handle this but flat out doesn't. All options I've found are going to run us basically ~$25k/year, which sounds like a lot until you realize we have 1-2 salaries (yes, they are ineffective salaries) dedicated to handling these add/move/remove requests. A this point I'm pretty sure I could just vibe code something that does what I want, but that seems like an un-scalable nightmare should anything change on either our end or ADPs. Anyone else have similar issues and an effective solution?