FastAPI Screenshot API: Capture Web Pages from Your Python AI Backend

FastAPI Screenshot API: Capture Web Pages from Your Python AI Backend FastAPI is the framework of choice for modern Python backends — especially for AI agents and ML services that need to capture web pages as evidence, screenshots, or structured data. But here's the problem: if your AI agent backend needs to capture a website screenshot, you can't use Selenium or Puppeteer. Those libraries block the event loop. Your async FastAPI handlers would hang, and you'd lose the entire benefit of async/await. This is exactly the problem PageBolt solves. Instead of managing local browsers, you just make one httpx call from your async function. Your screenshot is ready in under a second — no blocking, no browser dependencies, no event loop delays. The Problem: Why Selenium/Puppeteer Breaks FastAPI FastAPI is built on async. Your handlers are async def , your database calls are async, your HTTP requests are async. Everything flows without blocking. But Selenium and Puppeteer are blocking libraries