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My AI spent $15 on a test order, so I built an open-source payment guardrail

This story is from 2026-08-31. It is preserved in the archive; the latest stories are on the live feed.

My AI spent $15 on a test order, so I built an open-source payment guardrail TL;DR: An open-source Python + MCP library that sits between AI agents and money. Spend-capped agent identity (KYA), four deterministic gates (dry-run, budget, amount limit, human approval), prompt-injection defense, encry…

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  1. 2026-08-31 15:56 · DEV Community — AI
    My AI spent $15 on a test order, so I built an open-source payment guardrail

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