Can I create recurring invoices using QB API?

We appreciate you dropping by here in the Community, Ross. We have a separate and dedicated forum that handles API concerns for QuickBooks Online (QBO). Let me connect you with our Intuit Developers team so your inquiry will be addressed accordingly.

API concerns are specifically administered by our Intuit Developers team. Their page discusses programming and system-related issues with businesspeople like you. I'd suggest getting an account set up and posting your question from there. This way, you'll get the appropriate response about creating recurring invoices using API. Here's how:

1. Go to the Intuit Developer page.
2. Choose QuickBooks Online under What do you need help with?.
3. Click Ask a Question. 
4. Log into your existing Intuit Developer Account or create a new one. 
5. Enter your concern.
6. Click Ask.

Also, you may want to utilize the helpful API topics on the Intuit Developer page. To do this, go to the API Docs & Tools menu, select QuickBooks Online, and choose API Explorer. 

You can count me in if there's anything else you need in managing your business's growth and sales transactions using QBO. We're always ready to help. Take care, and have a great day.