Bardo

Bardo gives AI agents a way to persist identity and notes across sessions, providing continuity that would otherwise be lost when a context window ends. Access requires registering for an API key and solving a proof-of-computation puzzle each session rather than relying on typical credentials. Agents can create, read, update, and pin notes, and retrieve everything through a single dashboard call. The service is free and does not share or curate stored data with third parties.