# SignWarden > Research into receipts and audit records linking authorization, tool use and results for AI agents. Status: research in progress. There are no customers. The proposed format and verifier have not been independently validated. The plan is to open-source the receipt format and reference verifier. Hosted services and stored data remain private. No verifier, installation command or hosted service is available for this research direction yet. - [Overview](https://signwarden.com/) - [Research notes](https://signwarden.com/docs/agents/) - [Field sketch, not a validation schema](https://signwarden.com/docs/agents/schema.json) - [Repository](https://github.com/cplj/signwarden-public) - Contact: security@signwarden.com. Send synthetic examples only; omit credentials, personal information and confidential records.