Wintrust Open Banking Data Access (Plaid, aggregator-mediated)
Wintrust does not expose a direct consumer open-banking API. Third-party applications reach Wintrust / iBusinessBanking account balances, transaction history and account-holder data through open-banking aggregators; Plaid is the confirmed aggregator that supports Wintrust in the United States. There is no documented FDX endpoint, no stated CFPB 1033 data-access program and no Akoya/MX/Finicity listing found at review time — access is aggregator-only rather than first-party.