Show HN: Costile – open-source proxy, blocks AI API requests when budget is hit

Category: devtools

Tags: cost-management, ai-monitoring, proxy-server

Score: 6.5/10 (Innovation: 6, Technical: 5, Documentation: 8, Utility: 7)

Costile is an open-source proxy that sits between applications and AI APIs (starting with Anthropic) to provide real-time cost tracking and hard budget enforcement. It's interesting because it addresses a critical pain point in AI agent deployment—unexpected runaway costs—by blocking requests immediately when budgets are exceeded, unlike provider dashboards that update with significant delay.

Target audience: backend devs, devops

Repository: https://costile.com/ · HTML · MIT · 4 stars

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