Most billing tools ask for your full secret key or broad OAuth scopes. Here is how restricted keys actually work, what scopes to grant, and how to verify a vendor can't touch your billing.
Stripe stopped onboarding new Indian merchants, so I couldn't build yet another dunning tool. That constraint became the product: recovery software that physically cannot touch your billing.
Voluntary cancellations get the attention. Card failures and expired payments quietly drain MRR. Here is how to tell the difference in your Stripe data.