Yeah, my solution is just using a deep link - I'm unable to track whether or not the payment is completed due to the lack of a Venmo API.

I wrote about how it works here: https://gabeoleary.com/posts/venmo-deeplinking-including-fro...

When I wrote this it only worked on mobile. The deep link would take one into the app with the amount/details etc prefilled out. Just tested and it looks like the same format works on desktop now too.

I had until just now not realized that Plaid has a Venmo integration.

I could imagine using the deep link to begin the transaction and then using the plaid connection to look for it's completion...