Hi, I'm Daniel. I build SaaS products on evenings with Claude Code and Cursor and I ship several times a week without a test suite. Twice I found out from a customer that checkout had been broken for days. Uptime checks said everything was fine, because the homepage loaded. Mystra is the thing I wanted instead. After every deploy it opens a real Chrome browser, signs up on your app with a fresh email address, waits for the welcome mail, clicks through to Stripe Checkout, reads the plan and price and stops without paying. Then it checks that the paid area is still closed to that new account. Every run ends with screenshots, a video, a HAR file and the console log. It only alerts when it can prove a break: a failed request, a missing email, a paid page that opened for free. Flaky runs are held back. When the next run passes, the alert closes itself. Setup is a domain, one DNS record or a meta tag, and a deploy hook. No Playwright, no test code. The first run starts while you are still on the setup page. Two honest notes. It launched today, so the only apps it watches right now are mine, including Mystra itself: the status page is public and the link in the gallery is a real run from this week. And it is built for small SaaS with Stripe; if you run a marketplace or a custom payment flow it will not fit yet. Free tier is one app and 25 runs a month, no card. Starter is $29, Pro is $79. I read every message, so ask me anything here.

Mystra

A real browser tests signup and checkout after every deploy

A real browser tests signup and checkout after every deploy