prufa-mcp

Prufa is an AI QA engineer for web products that checks signup, login, and checkout flows after deployment. It is built to catch breaks in minutes after every deploy, using a real browser and machine verification rather than waiting for customers to report a problem.

Its reports separate verified findings from advisory findings. Verified findings cover deterministic checks such as redirects, HTTP status codes, and beacon events, and the page shows examples including a payment redirect returning 404, a GA4 conversion beacon not firing, and a login flow passing all four steps. Advisory findings are marked as opinions, such as a form field that appears to lack a visible label or a consent banner that may overlap a primary call to action. Prufa also includes Gremlin mode, which runs money flows under adversarial conditions by mutating inputs, timing, and edge-case paths; the page describes this as chaos QA and says each run produces a most valuable finding.

The service runs a real-browser audit after a URL is pasted, and the report appears in the browser in about 60 seconds. It says no account, no npm install, and no Playwright config are needed for the first audit. After a site is connected, every push to the main branch triggers a re-run of the checks via a deploy webhook, and a Slack alert can fire with a screenshot and step trace when a previously passing flow fails. The page also shows a report view with step-by-step runs and named assertions.

A free audit is offered with no credit card required and no signup required to run it. The product is presented as an AI QA engineer for web products.