Postern

About

Postern provides a self-hosted gateway that links your Money, Health, Calendar, Mail, Contacts, and Home to any AI agent or harness. It eliminates the need for glue code and does not share credentials with agents, while also removing the need to guess endpoints or schemas. Information is primarily delivered from a local cache, though agents can retrieve live data as needed. Access is managed on a per sector and per agent basis, is simple to revoke, and every agent action is fully audited and logged.