I don't think a Stripe integration is on the immediate roadmap but it may happen at some point
There are a few stripe templates in v0, including two of my own (the Neon+Stripe ones)
They use Upstash KV to store stripe subscription status and will help you register a webhook so that any time a user's sub status changes, it updates KV immediately. Then you can always check KV for accurate sub status before performing an action rather than having to contact Stripe (which is slow and has strict rate limits)
One of the templates is labeled SaaS and it is the same except it has a CRUD system built in too
If you already have your app set up, you can open my template and ask v0 to explain where the payment code is. It's pretty neatly packaged into /api/stripe so you should almost be able to lift it out directly into your app
https://v0.app/community?q=stripe