What a beautiful backend !! Do you have an open source frontend available other than by paying $50 ?

I am so glad you liked it :)

Unfortunately not at this stage - If you are interested in linking it up to a front end and doing a bit of work yourself you could checkout the nextjs repo that pocket-base stripe was inspired from and adapt it to use PocketBase

If you do that throw up a PR on pocketbase-stripe and help others build :D