Know Your Agent: Why US Banks Are Blocking AI Agents and What It Means for Agent Architecture
Know Your Agent: Why US Banks Are Blocking AI Agents and What It Means for Agent Architecture Charles Schwab blocks unauthorized AI agents a double-digit number of times every week, and major U.S. banks are now detecting third-party agents inside customer accounts and removing them (Source: PYMNTS, 2026). Some of those agents held the customer's own login credentials, and still took actions the…
U.S. banks are increasingly detecting and blocking unauthorized AI agents that gain access to customer accounts. Charles Schwab alone blocks such agents multiple times per week, and major banks like JPMorgan, Bank of America, and Citi are now restricting third-party agents inside customer accounts (PYMNTS, 2026). This issue stems from AI agents that can hold customer login credentials and take actions the customer never requested, despite not being actual fraud cases (Axios, 2026).

