API Integration between ecommerce sites and accounting software -- 2

Hello, we would like to setup an integration between the ecommerce sites we sell on and our accounting software. The accounting software we use is Sage Intacct. The marketplaces we sell on include: Amazon, Shopify, eBay, Walmart and Etsy. The integration would pull order and return information and details into our accounting system. We do not need to sync anything TO the marketplaces - we would like the integration to run at minimum once a day (or more frequently throughout the day to prevent throttling either by the marketplaces or our accounting software.

We are open to developing the project on an existing integration platform / service to reduce development costs. If you have suggestions on platforms or services that this project could be built on, please let us know as that might be easier than building an entire tool from scratch.

I can provide a screen recording of the functionality of our current integration tool via the chat. I also have the API reference information that can be provided as well; we do not need to pull all data elements from each transaction, I can provide the list of the details we need to pull for the transactions via chat.

We can structure the project in a way that makes sense for milestone payments.

I can provide more information via the chat.