Give the AI a mandate,
not your wallet.

GuardCart searches, compares and optimizes payment for you — but a deterministic policy engine decides what is allowed, inside the limits you set here.

What should GuardCart buy?

Your mandate

These limits are enforced by deterministic rules, never by the language model.

Maximum total spend (HK$)

Ask me before spending above (HK$)

Maximum loyalty points usable

Mandate expires

Trusted merchants only Unverified sellers are blocked automatically.

Category running shoes Enforcement deterministic policy engine

GuardCart is working

Top candidates

Effective cost is price plus shipping plus payment fee minus reward value. The cheapest sticker price does not automatically win.

Policy check

The AI recommends. You authorize. The deterministic policy engine decides — same inputs, same decision, every time.

Rule evaluation

Payment options compared

Demo payment data — simulated rails, not real rates.

Audit trail

Why did the agent do this? Every step is on the record — explained by rules, not invented afterwards.

Give the AI a mandate, not your wallet.