Major US banks clamp down on AI agents logging into customer accounts

Major retail and investment banks across the United States have started locking out autonomous software agents that log into consumer accounts using customer credentials. Lenders including Morgan Stanley and JPMorgan reported an influx of automated agents accessing financial portfolios, in several instances taking actions without explicit customer direction. Morgan Stanley has instituted outright blocks against agent traffic, while other national institutions have enacted targeted screening measures to detect non-human browsing behavior on their platforms.

Banking executives expressed concern that unmanaged programmatic access poses acute transaction integrity risks and complicates compliance protocols around authenticated account access. In response, a majority of affected institutions are moving toward policies that restrict third-party artificial intelligence agents to read-only interfaces. The sudden restrictions indicate that retail financial infrastructure remains unprepared for consumer-facing automation tools that execute unguided account modifications, transferring liability and reconciliation burdens back onto custodial banks.