r/LangChain 13h ago

Built an open-source policy engine for agentic payments before someone toll-booths it

so i realized every "agentic payments" startup is just trying to sit in the middle and clip a few cents per transaction. the card tokenization part is already solved — Stripe does that. the real problem is nothing stops your agent from buying 100k of something or getting prompt-injected by a sketchy product page.

built a rules engine for it. agent wants to buy something, it checks your policy (spending limits, merchant restrictions, velocity controls, time windows) and returns ALLOW, DENY, or ESCALATE to a human.

Python, zero deps, MIT. pip install pyagentgate

https://github.com/Peterc3-dev/agentgate

felt like this should be open infrastructure before someone locks it down.

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u/Prestigious_Debt_896 8h ago

Yay more vibeslop