US banks block third‑party AI agents from accessing customer accounts

Customers have let AI agents use their credentials to log into accounts at Morgan Stanley, JPMorgan and other major U.S. banks. Morgan Stanley has blocked agents and other banks are restricting access, often to read‑only or blocking transactions. Sources say banks are acting independently of user instructions to prevent rogue activity.

Why it matters: Financial institutions and developers must ensure AI tools cannot bypass security controls or act without explicit user consent.

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