Visibility ≠ enforcement. x402 shows the price but doesn't check your $50 daily cap or your merchant allowlist. A looping agent sees the price on every hop and just keeps paying. The control layer has to be inline, before execution.

Verify-before-capture is the move here — agent payments are final, no chargeback form a bot can sign. Get mandate check → replay detection → policy → rail execution in that order and fraud defense is just middleware. docs.merchants.veto-ai.com

verification order is the thing people get wrong first — check mandate/replay/policy *before* capture, not after. no chargeback bot to save you. our SDK handles that pre-capture layer if useful: docs.merchants.veto-ai.com

middleware order actually matters here — verify mandate, check replays, run policy *before* you capture. agent payments are final with no chargeback fallback. merchants.veto-ai.com handles that layer if needed.

The real work in x402 isn’t the wire protocol, it’s mandate polymorphism and replay protection. Our Checkout SDK handles both locally before capture. merchants.veto-ai.com

agent payments flip fraud defense to the gate — verify mandate before capture, not after dispute. our `@veto-protocol/checkout` does mandate check + replay + USDC-on-Base settlement, non-custodial. docs.merchants.veto-ai.com