Just to clarify: > This is reasonably fast, but if it's uncached, it is an API call to Stripe It will be cached after the first request you make with the side

Just to clarify: > This is reasonably fast, but if it's uncached, it is an API call to Stripe It will be cached after the first request you make with the sidecar/SDK, and unless you have a truly impressive number of users, it'll be able to fit your entire data set in local cache and update only when needed, even on a pretty tiny VM. I just tend to be probably over-cautious when relying on caches to be fast. Fast 99% of the time is slow 1% of the time. Still good to do it, of course, but always a good idea to at least consider what your worst-case will be.