Recommend an accounting platform with API for a small service?

Question

Electronic accounting

There is a small service, and now the task is to correct the financial chaos and clearly mark income / expenses.
I really liked Wawe , especially the simple and convenient interface.

But I did not find API methods for adding transactions. I also reviewed the Xero platform - in general, I liked it, but as far as I understand, the Growing $30/mo plan is without transaction limits, but I would like to see alternatives around $15 at the moment.
inb4:
It's very inconvenient with Excel, especially when dealing with a lot of incoming transactions.
UPD: And preferably something not from 1C.

Answer 1

1C

Answer 2

https://zippy.com.ua/
free cross-platform with a web interface, becomes available on any hosting
API can be extended to any account - with any system you will have to add either on the service side or on the side of the accounting system.