Authorize the change.
Not the whole transaction.
AI agents can modify completed orders. ChangeMandate computes the economic and contractual delta, then returns a deterministic decision: ALLOW, ALLOW_WITHIN_PREAUTHORIZED_DELTA, or NEW_AUTHORIZATION_REQUIRED.
$0.002Basic authorization diff
$0.005Monetary delta validation
$0.02Recurring liability change
POST https://changemandate.xguardgate.com/v1/authorize-order-change Retail exchange · flight change · hotel upgrade · delivery substitute · subscription upgrade