Can I use Viewpo with GitHub Actions?

A GitHub Action is coming in a future release. In the meantime, you can call the HTTP API directly from any CI/CD pipeline using curl or fetch.

Does the API work with Claude Code and other AI agents?

Yes. The API returns structured JSON that AI coding agents can parse and act on. Send a URL, get a grade and issues, fix the code, re-audit — all in one conversation.

Automated responsive audits. For your CI pipeline and your AI agent.

HTTP API that returns screenshots, audit results, and an A-F grade as structured JSON. Works with GitHub Actions, Claude Code, and any HTTP client.

The problems you know too well

Manual responsive testing doesn't scale

You resize the browser, check a few breakpoints, and call it done. But you only check the pages you remember. The edge cases slip through.

No responsive quality gate in CI/CD

Lighthouse catches performance regressions. ESLint catches code style. Nothing catches "the hero is overflowing at 375px."

AI agents can't see what they build

Claude writes CSS, but it can't see the rendered output. There's no visual feedback loop. You're the eyes.

How Viewpo helps

The features that matter most for your workflow.

HTTP API

Send a URL, get back screenshots, audit results, and an A-F grade as JSON. Use curl, fetch, or any HTTP client.

CI/CD integration

Add a Viewpo audit to your pipeline. Every preview deploy gets checked automatically. Grade below B? The check fails.

AI agent integration

Your AI coding agent calls the Viewpo API, gets Grade D with 7 overflow issues, fixes the CSS, re-audits, gets Grade A. Closes the visual feedback loop.

Structured JSON output

Every audit returns structured JSON with per-viewport screenshots, per-check results, and an overall grade. Parse it, act on it, display it.

Interactive sessions

Open a persistent browser session via the API. Send actions (click, type, scroll) using compact element refs. Get screenshots and audit results after each interaction. Stream the session live to your team via WebSocket.

Add a Viewpo audit to your CI pipeline. Every PR preview deploy gets audited automatically. Grade below B? The check fails. CLS above 0.1 on mobile? Flagged. No more "it looked fine on my monitor" bugs in production.

Frequently Asked Questions

Quick answers to help you decide.

The API returns JSON with: overall grade (A-F), per-viewport screenshots (base64 or URL), per-check results (pass/fail with details), and metadata (URL audited, timestamps, viewport sizes).

Read all FAQs

See How Viewpo Compares

Already using another tool? See how Viewpo stacks up.

Viewpo vs Polypane → Viewpo vs Responsively App → Viewpo vs Google Lighthouse → All comparisons →

See how your site looks on every screen

Paste any URL and get a responsive design audit with real browser screenshots and an A-F grade. No install required.

Free during beta. Plans from $19/mo at launch — early supporters get a lifetime discount.