SynthAPI

I kept running into the same bottleneck on almost every project: the UI is ready to go, but the backend API isn’t finished yet. Hardcoding mock data or using basic static JSON generators gets messy quickly, especially when you need to test real-world edge cases like rate-limiting, network latency, or server errors. To solve this, I built SynthAPI. SynthAPI is a developer tool powered by a specialized AI agent that generates live, stateful mock API endpoints in seconds. It doesn't just serve static JSON; it acts like a real, slightly unpredictable backend so you can properly test your frontend. ✨ Key Features: 1. 🤖 AI Agent & Web Search: Just describe what you need, and the AI will build the entire CRUD API and database schema for you. It can even search the web to populate your endpoints with highly realistic mock data. 2. 📄 OpenAPI Imports: Already have your specs? Import your OpenAPI/Swagger files, and it will instantly spin up a live, working API that matches your exact schema. 3. 🚦 Simulate Chaos: Configure random 500 errors or high latency to test your app's loading states and error boundaries. 4. 🔒 Auth & Rate Limiting: Simulate rate limits (e.g., 429s) and basic auth flows without writing a single line of backend logic.