Option b will allow more control, some people might want it configurable from the webadmin
I also believe that option B is better because it provides greater control. However, in my opinion, it’s also worth adding a link to /list subpage and /pastalist endpoint (I don’t know if it’s possible, but either it should be a single value, or there should be a note stating that for the /list to work, the /pastalist endpoint must be enabled) if someone wants to publicly share a list of all links.