Photoshop - populating a textbox dynamically from external source

I am not a photoshop expert, so I am checking with the community to see if Adobe photoshop already offeres a feature for the following use-case. I have a couple of text-boxes in my photoshop (PSD) file. I want to populate the textboxes dynamically from an external source (like AEM content fragment) that comes in json format. So when another use opens the PSD file, it would populate the textboxes dynamically from the specified source. Are there any plugins or tools for Photoshop that I could use to make this possible? I tried using variables in photoshop, but that does not seem to have an option to feed automatically from an external web url. I would appreciate any insights or recommendations.