Take a look at a project I just finished this weekend: https://clawband.io
It's an agent permissioning platform that isolates your service connections and puts a granular permissioning layer on it. So rather than your agent getting full access to a service, they get a Clawband key that can be used to request actions then Clawband checks the parameters to see if it is allowed.
The classical example I have made is allowing your agent access to privacy.com. You may want it to be able to list your cards but not create one or you may want to allow creating cards but only a certain limit.
The plan is to make it open-source and allow self-hosting because security / sanity of users but still have a SaaS offering as a demo / ease of use.