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Open the companion tool →The risks of unconstrained agent purchasing
Autonomous AI agents can misunderstand quantity prompts, fall into loop execution errors, or fall victim to prompt injection on third-party merchant sites.
Using merchant-specific virtual credit cards with hard dollar limits ensures an runaway agent loop cannot drain your main bank account or credit line.
The protocol
- Never connect your main debit card or primary credit card directly to an autonomous agent platform.
- Use a virtual card provider (e.g., Privacy.com or your bank's virtual card feature) to set a strict per-transaction and monthly cap.
- Enable real-time SMS or push notifications for every purchase attempt made by the agent.
- Require manual 2FA approval for any transaction exceeding a specified threshold (e.g., $25).
What the tool does
Build a authorization protocol with spending caps, virtual card limits, and emergency kill switches for autonomous agents.
Limit first: This tool generates security guidelines. You must configure virtual card settings directly through your card issuer or banking portal.
Open the companion tool →One human next step
If an autonomous agent makes an unauthorized or runaway purchase, freeze the virtual card immediately and contact your card issuer to initiate a dispute.
Research log and safety checks
AI-assist path: multi-factor authorization architecture. §6.10: grounded in agent safety best practices.
§0.5 protection result: category is financial-agent-exposure; crisis-adjacent: no; fear/urgency/scarcity toolkit used: no. The protective function is free and the paid feature is convenience only.