Developer builds Cloudflare Worker to offer public AI features without surprise bills

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A developer has released a Cloudflare Worker-based tool called Free-Tier AI Relay, designed to let app builders offer public-facing AI features without risking unexpected API costs. The ~20 KB worker acts as a relay between the user's app and AI providers, keeping API keys server-side and away from the browser. It prioritizes free-tier providers like Google Gemini and OpenRouter community models by default, with paid fallbacks disabled unless manually enabled. Usage is capped daily per device and globally, ensuring spending never exceeds a developer-defined ceiling. The boilerplate is available on Gumroad under a pay-what-you-want model and is aimed primarily at indie developers who want frictionless public AI demos without login walls or financial risk.

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