Vigil
Monitor and optimise every AI call your agents make
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Vigil - Monitor and optimise every AI call your agents make

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One proxy URL to your frontier model of choice. Every agent's cost, errors and latency, per call — and token optimisation on top.

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Hey Product Hunt 👋 I'm Sam, and I built Vigil. It started with my own AI bill. I was running agents for my projects and spending money I honestly couldn't afford, with no idea which agent was burning it or why. On top of that, a call would go in looking perfectly fine and come back as some mysterious error, and I'd lose hours figuring out what went wrong. So I built Vigil for myself. One URL between my apps and the AI providers, logging every call: what it cost, how long it took, what failed and why. Then I made it optimise the spending automatically, without changing a single answer. It worked so well that I started sharing it with friends running their own agents. They liked it enough that I decided to turn it into a proper product. If you're running agents in production, I'd love your honest feedback: what's the one thing that would make this a no-brainer for you?