Open Source Aggregator API for Accounting Software – Feedback Wanted

I’m planning to build an open source Python package that acts as an aggregator API for major accounting software (like QuickBooks, Xero, Zoho Books, FreshBooks, etc). The goal is to provide a unified interface to create and update invoices, bills, customers, vendors, and credit notes across different platforms.

The idea is to simplify integrations for developers who need to work with multiple accounting systems, handling authentication, data mapping, and API differences under the hood.

Would this be helpful to you? Any suggestions, feature requests, or reasons why this might not be useful? Should I go ahead and build it, or is there something similar out there already?

All feedback appreciated!