SpendLeash enforces hard monthly caps on every AI agent, blocks overruns in real time, and requires your approval before a dollar goes over budget.
There's nothing built into AI agents or APIs that prevents unlimited spending. Developers learn this the hard way — often after the fact.
AI agents and APIs have zero built-in limits. They will keep making requests and charging your card until the balance hits zero or the card is declined.
Agentic workflows operate 24/7. A runaway agent can rack up hundreds of dollars overnight — you won't find out until you check your statement in the morning.
Giving an AI agent payment access is like handing it your card with no PIN. One runaway loop or one edge case — and the charges compound fast.
SpendLeash intercepts every transaction before it reaches your payment processor. Nothing gets through without passing the limit check first.
Set a monthly dollar ceiling per agent. Enforced at infrastructure level — no agent-side bypass is possible. Limit hit means locked out.
Every transaction checked before it reaches the processor. Overruns blocked in milliseconds — no surprise line items on your card statement.
Agents that hit their limit trigger an approval request to you — email, push, or webhook. Approve an exception or raise the cap from your phone.
Run five agents? Give each its own budget. Agent A gets $20/mo for lookups, Agent B gets $200/mo for heavy builds. One dashboard, full control.
See exactly what each agent has spent in real time, broken down by transaction. No bill-shock. No guessing what the month-end statement will say.
Your payment details are encrypted at rest. Agents trigger charges through SpendLeash — they never see your card number or billing address.
These aren't edge cases — they're what happens when AI agents get unrestricted payment access.
"I woke up Monday morning to find my agent had burned through $280 in API calls over the weekend. There was absolutely nothing stopping it — no limit, no alert, no kill switch in sight."
"The only reason I didn't lose more was my card had a general monthly limit. The agent hit it and stopped. Without that, it would have kept going indefinitely through the night."
"Virtual cards with hard, non-adjustable ceilings are the only proven method for preventing automated systems from running up unexpected charges on a real payment instrument."
"The OpenClaw incident was a warning. Any agentic workflow with payment access needs a gatekeeper layer — this isn't optional anymore. It's table stakes for any serious deployment."
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