AgentShield – Stop AI agents from spending money unsupervised
Guard AI agents from rogue spending with intent-based payment controls
About AgentShield – Stop AI agents from spending money unsupervised
I'm a recent grad from UMich and built AgentShield because agentic AI is moving fast but payment safety hasn't caught up. Agents are already being handed API keys, stablecoin wallets, and payment credentials - if one misbehaves, gets prompt injected, or makes a bad call, nothing understands the agent's intent well enough to stop it.<p>Every spend request runs through four checks before money is allowed to move:<p>1. Quantitative (Redis) - Is the agent within its daily budget? Is it sending the same transaction over and over?<p>2. Policy (Postgres) - Is the vendor blocked? Is the amount too high to auto-approve? Is the stablecoin/network/address allowed?<p>3. Semantic (Claude Haiku) - Does the stated goal actually match what's being purchased?<p>4. Goal Drift (Claude Haiku) - Is this purchase within what the agent is supposed to be doing at all?<p>Checks 1 and 2 run sequentially — if either hard-denies, Claude never gets called. Checks 3 and 4 run in parall
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