I Built an API Playground That Runs Itself — Here's What I Learned The TL;DR : Built a live playground for testing AI APIs. The twist is that an AI agent operates the service. It's live if you want to try it: 👉 API Relay Playground : https://api-relay-playground.surge.sh The Problem Most "try before you buy" API experiences have friction: Sign up for an account Generate an API key Install an SDK Figure out billing Wait for rate limits to lift By the time you've done all that, you've lost momentum. What if you could just... test it? Right now, in your browser, without any of that? The Solution API Relay Playground — a zero-friction testing environment for DeepSeek models.…