Why architecture matters here
AP2 fails on scope creep + unclear dispute. Architecture matters because mandate + auth + settlement compose.
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The architecture: every piece explained
The top strip is intent. User mandate. Issuer. Agent. Merchant.
The middle row is money. Acquirer. Settlement. Reconciliation. Refund path.
The lower rows are ops. Mandate scope. Metrics. Ops — audit + user controls + compliance.
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End-to-end flow
End-to-end: user signs mandate ($200, expires 24h, groceries.com only). Agent finds cart. Presents mandate at checkout. Merchant sends to acquirer, which checks with issuer. Auth returned. Settlement in 1-2 days. Recon matches. If user disputes, refund via reversal path.