Would be a hard core privacy violation to ask people to upload a json full of paid invoices... :-/
Discussion
True. man you got me all excited there for a second..
Do it client-side.
I use WebLN on the client side. I can get a list of the payments (https://lightning.engineering/api-docs/api/lnd/lightning/list-payments). But I don't think you can get the payment destination out of it.