Is there a way to list your vaccine requirements so that potential clients know this before contacting me?

There is a place within Preferences for the spaying/neutering requirement:

https://www.rover.com/account/profile...

Be sure to click on the "I'd like to add more preferences" link to get all of them.

As for vaccination currency, you will have to write that into your Profile and you can reiterate your requirement for neutering thee as well It never hurts to emphasize what's important to you.