For how long is it safe to cache a Prismic API ref

[Phil (Phil Snow)]

I feel I did answer his question in the post I linked:

@Prismic data caching

We don’t recommend using a caching system as this can cause issues when the master ref is changed on every document update, this can cause websites to break. Make sure you are using your CDN endpoint to offer your website extra protection and speed, for example https://your-repo-name.cdn.prismic.io/api/v2. Also like Paulina said the platform is very stable. We have exceeded the Uptime of 99.9% for the past 26 consecutive months and are committed to maintaining this standard.

So it's never really safe to cache the endpoint as it changes with every document update.

Also as we talked about we recently replicated the API ref endpoint in London for our European customers to have a faster response time on that endpoint, we will do the same for our Asian customers soon, so hopefully, there shouldn't be much need to cache the endpoint soon if everyone is already satisfied with the response time.