There are instances where the configuration of a Micropub endpoint can change. Currently both the Media Endpont url and the syndication values are in the Micropub's config query. Because the Media Endpoint is an external service it makes sense that at times this url may change, and the user shouldn't have to log out and back in to update that value.

We did some brainstorming about this in chat.

One option is that a Micropub server could provide a time after which the config values should be refetched. This is particularly useful in the scenerio I discuss in chat where I might have to update my Media Endpoint url every 7 days due to Amazon s3 restrictions. In this case the server could add a new configuration value called "expires_in" similar to the access token's attribute (#17) that defines the number of seconds that the configuration values are valid for, after which the Micropub client should refetch the configuration values before using them.

If no expires_in is provided, we might come up with a suggested default timeframe to refetch the config values or just recommend a button in settings that allows a user to refetch all the config values without having to log out and back in essentially refreshing their Media Endpoint url and syndication links.