Thanks for the answer. I don't want to discourage you for your project, but this action is stricly forbidden on Instagram's Terms of Service (https://help.instagram.com/478745558852511 Item 10)
Using this to sort out your own problem would probably fine as they will not notice it, but selling this as paid service might cause some trouble for you with Instagram Legal and also at the same time if you keep using same IP Instagram will probably block your APi after some time when they sense the usage.
Just a friendly notice for the things you might face in near feature :)
i admire your boldness but this is probably going to be a dead project soon. Maybe make a quick buck while you can?
Edit: because reverse engineering their api is also against their guidelines. Just because you don't use their official api, doesn't mean you don't have to adhere to their rules.
Using this to sort out your own problem would probably fine as they will not notice it, but selling this as paid service might cause some trouble for you with Instagram Legal and also at the same time if you keep using same IP Instagram will probably block your APi after some time when they sense the usage.
Just a friendly notice for the things you might face in near feature :)