An assistant connected to Keeper.sh can now create, edit and delete events, list the invitations waiting for a reply, and RSVP to them. It can also list your connected accounts and fetch the link to your combined calendar feed, which is often what someone asking for your availability needs.
Every one of these actions is also available as a REST API. A new API tokens page under Settings lets you create tokens and revoke each one on its own, so you can cut off a script without disturbing an assistant you still use.
Free accounts include 25 calls a day, shared between assistant and API access. Pro removes the cap on both.
The MCP server docs list every tool an assistant can use.