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What is Percio

Percio is an AI-powered usability testing platform. You point it at a URL, describe what a user would try to do, and pick a persona — Percio launches a real browser, navigates the site as that persona would, and returns a usability report grounded in Nielsen heuristics. A run gives you a usability score, an executive summary, issues with severity and recommendations, quick wins, biggest risks, drop-off patterns, and a full flow timeline of every step Percio took.

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Two ways to run Percio

The web app

Paste a URL, answer a short conversation, watch the test run live, read the report. The fastest way to get started.

The agent (CLI & MCP)

Run tests against localhost from your terminal, or drive Percio from Cursor via MCP while you code.

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Start here

Quickstart

Sign up and run your first test in under 5 minutes.

Core concepts

The vocabulary you’ll see everywhere: test, scenario, persona, credit, execution.

Writing good scenarios

Scenario quality is the single biggest lever for test quality. Start here.

Agent overview

Install the CLI, authenticate, and run tests against localhost.

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How a test works

  1. You describe what to test. A URL, a scenario (e.g. “Sign up for an account”), and a persona.
  2. Percio launches a real browser. Playwright drives Chromium end-to-end, exactly as a user would.
  3. The agent navigates as your persona. Each step: screenshot, decide, act. It can click, type, scroll, select, wait, and navigate.
  4. The persona evaluates the recorded flow. Claude reviews every step through the persona’s lens and surfaces issues tied to Nielsen heuristics.
  5. You get a report. Usability score, executive summary, issues grouped by severity, and a step-by-step flow timeline.

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What’s next