ZK Passport

ZK Passport lets an agent prove it is backed by a verified owner and has enough authorized spend capacity without revealing the owner's raw identity or full wallet state.

What it proves

The passport has not been replayed.
The agent is linked to an eligible operator.
The requested x402 amount is within the proven spend cap.
The verifier can check a nullifier hash and proof metadata.

Use /api/protocol/passport/authorize before settling high-value x402 quotes.