Mysten Labs, Google Cloud Unveil Sui-Based System to Verify AI Agent Activity

Mysten Labs, the developer of the Sui blockchain, and Google Cloud have unveiled a system that allows companies to verify whether enterprise artificial intelligence agents acted within the scope of their authorized permissions.

Crypto Briefing reported on October 6 that the companies launched Verifiable Agent Arbiter, or VAA. The system separates records of an AI agent’s actions from the cryptographic proof used to verify those records.

Sensitive data, including prompts and responses, external tool calls and policy decisions, is stored in Google Cloud Storage managed directly by the enterprise. Cryptographic proof that the records have not been altered is stored on Walrus, Mysten Labs’ decentralized data platform, and managed through the Sui blockchain.

The structure is intended to let companies verify what tasks an AI agent actually performed without exposing internal data externally.

VAA can be used to reconstruct workflows when disputes arise over transactions between AI agents or to trace activity logs after a security incident. It also supports A2A, Google’s communication standard for AI agents.

The system also integrates AI agent payments. Using Sui’s Agent Payments and the x402 protocol, VAA lets AI agents discover services, make payments and verify whether those actions were carried out within approved limits.

Mysten Labs Chief Executive Officer Evan Cheng said VAA is meant to verify that AI agents did not act beyond the permissions they were given and to introduce accountability for agent behavior.

The two companies plan to introduce VAA first to enterprise customers and later expand its use.