Show HN: A verification browser for AI agents – 13ms windows, one-call checks

A developer has created Hwatu, a verification browser for AI agents that performs page checks in approximately 13ms with a single API call—roughly 9x faster than traditional Playwright-based approaches. The tool operates headlessly by default, uses a lightweight static binary with the system's WebKitGTK instead of bundling Chromium, and allows AI agents to verify page states with measurable accuracy rather than making unsubstantiated claims. Hwatu integrates with popular coding agents like Claude and Cursor through various connection methods including native sockets and the Model Context Protocol.