Key agents are users/services that protect and use a key to sign transactions at hire of the subscriber. Key agents have a general profile and 1:n extended public keys associated with their profile.

What data on the key agent profile is public? IMO, it's like a public social media profile.

A key agent may share their key with users (or vice versa), and either party can create vaults with both participants. In many cases, the key agent will be the vault creator.

The key agent profile can be like a normal nostr profile with additional metadata, either key/value pairs or attributes like jurisdiction, social media links, etc.

Each key will have metadata, either key/value pairs, or attributes like temperature, response time, device type, cost per signature, monthly cost in basis points, etc.

What data on the key agent profile is public? IMO, it's like a public social media profile.

Key agents should be able to communicate with their clients directly in the app using Nostr DM protocols.

Key agents should be able to post public events to the Nostr timeline and have them appear with their profile in the app.

When new activity occurs (key shares, proposals, etc), users get a DM style message and push notification.