Integration of an Api for dynamic QR Codes in Indesign

You now have a PDF template but you want InDesign to create its QR codes?

I get the impression that you want to send that PDF around, to have others fill in the input fields and they'd actually see the QR codes appear in that same PDF. That is unrelated to InDesign.

(Not that it could not be made to work. But you'd have to send InDesign around too, with your PDF, as "engine" to run your program. Adobe would not like that.)

How to run Javascript -- or anything else related -- inside a PDF is better asked in the Acrobat forum: https://community.adobe.com/t5/acrobat/bd-p/acrobat?page=1&sort=latest_replies&filter=all

It can be done with javascript as Rob mentions. I have used it in one of my older scripts - https://colecandoo.com/scripts/ (look for Data Merge Colored QR Code Maker).

Otherwise, there is an SDK available here: https://www.adobe.com/devnet/indesign/sdk.html

Rob's link is for an older version of InDesign but this API - both hosted by PublishingX - is for CC 2020: https://www.indesignjs.de/extendscriptAPI/indesign-latest/#about.html

BarcodeMaker by Teacup Software may offer what you're after: 

http://www.teacupsoftware.com/product/barcodemaker/?gclid=CjwKCAiA98TxBRBtEiwAVRLqu6TXMTbdmfPaiZvCw2xCVwMG4GDrdp3HFMAgo8xtulMZ3nngxGLOIRoCnFcQAvD_BwE

Do you mean via scripting? You can script QR code creation, but you would have to build the dialog in the script.

Here’s the Javascript API

https://www.indesignjs.de/extendscriptAPI/indesign10/#Document.html#d1e47196__d1e51535