Hello HN,<p>I’ve always loved building frontend-only apps—those you can prototype over a weekend, host for free on GitHub Pages, and scale to millions of users. Unfortunately, AI-enabled apps complicate things, as exposing your OpenAI key to the world is obviously a no-go. This also means mobile developers often have to run their own servers.<p>That’s why I built ServerlessAI, an API gateway that lets you securely call multiple AI providers directly from client side using OpenAI-compatible APIs. You can authenticate users through any identity provider, like Google or Apple, and set per-user request or spending quotas. You can also define an allowlist for endpoints and models. To monetize, you can apply different quotas for various user tiers.<p>To start, I recommend checking out our tutorials, where we walk you through building a complete, deployment-ready AI app in 5 minutes. We’ve got tutorials for React, Next.js, and iOS: <a href="https://serverlessai.dev/docs/tutorials/" rel="nofollow">https://serverlessai.dev/docs/tutorials/</a><p>Our long term vision is to offer the best toolkit for AI developers at every stage of their project’s lifecycle. If OpenAI / Anthropic / etc are AWS, we want to be the Supabase / Upstash / etc. We are building optional out-of-box tools for authentication and payment management, so you can roll out your prototype faster. In the future, we want to provide the best prompt engineering tools for fine-tuning, A/B testing, and backtesting, as well as the best observability tools.<p>We’d love to hear your feedback. Thanks for stopping by!