Your AI coding agent writes code fast. But does the web product actually work?

The login flow still holds up on mobile-size screens. The checkout still renders after that refactor. The new dashboard doesn't break under a real user's clicks.

Muggle Test helps your AI agent test your web product the way a real user would. Paste a URL — the agent clicks through signup, checkout, and every critical flow across desktop and mobile viewports, reporting failures with step-by-step screenshots. Catch UX regressions before users do.

Currently supports web products. Mobile native coming.

We also maintain two open-source projects for AI coding workflows: — muggle-ai-works · Claude Code / Cursor / Codex plugin that brings testing to your AI coding assistant. MIT.
— muggle-ai-teams · Agent orchestration workflow for Claude Code. MIT.

Based in Foster City, CA · Shanghai · muggle-ai.com · No credit card required.

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