Scrinly

Scrinly is a screenshot API that captures pixel-accurate web pages and turns them into structured visual context for software, and increasingly for AI agents. One API covers full-page captures, deterministic page regions, visual diffs between captures, monitoring, and visual style guides, so you don't have to stitch three services together to answer the question of what a page looks like right now and what changed since last time.

The gap it fills is that most screenshot services stop at the image. That's fine for a thumbnail or a link preview, but an agent or a test suite usually needs more than a picture. It needs the part of the page that matters, addressed the same way every time, or a clear answer to whether anything moved since yesterday. Scrinly returns regions you can address deterministically and diffs you can act on, which is the difference between a screenshot and something a program can reason about without a human squinting at two images.

It works over a single POST endpoint at /render/screenshot. You choose a device preset such as iPhone 15, iPad Air or a MacBook Pro 14, ask for a full page or for specific regions, and get the result synchronously by default. When a job is heavier or you'd rather not wait, setting async to true queues it and a webhook tells you when it's done. Output can land in Scrinly's own storage or go straight into your S3, Cloudflare R2 or Backblaze B2 bucket. Billing is credit based and charged before the work starts, refunded when a capture fails, at one credit per screenshot with two more for regions and three for a style guide.

The agent side is where it's leaning hardest. There's an MCP integration with OAuth scoping for Claude Code, Codex, Gemini and Cursor, and an agent skill published on npm, so an agent can take and compare screenshots without you handing it a raw API key. That matters for developers building agents that browse, verify or monitor sites, because a scoped credential that can only take screenshots is a much smaller thing to trust than a full key.

It suits teams who want visual regression checks without adopting a full browser testing framework, developers who need previews on real device sizes for a design review, and anyone monitoring a set of pages for unexpected changes. The public changelog and dashboard behind the docs make it easy to see the pace of the product before you build on it.

What sets it apart is the structure around the image rather than the image itself. Regions, diffs and style guides through one endpoint, plus first-class agent access with scoped credentials, is a narrower but far more useful shape than a generic capture service. The trade-offs are the credit surcharges on the richer outputs, a focus that never widens beyond screenshots, and the reality that heavy monitoring workloads push you up the tiers.

A first call is a single POST with a URL and, optionally, a device preset and a list of regions. The synchronous default returns the capture directly, which is convenient for a test suite or a script, and switching to async with a webhook is the path for larger jobs or batches. Because results can be written straight into your own S3, R2 or B2 bucket, the images never have to pass through your application server, which keeps the integration to a few lines and keeps storage costs where you already pay them.

Against a plain screenshot service, the difference shows up the second time you capture the same page. A generic API gives you two images and leaves the comparison to you. Scrinly gives you a diff, and because regions are deterministic, the comparison is of the same slice of the page each time rather than a full-page image that shifts when a banner appears. For agents the scoped MCP access is the other separator. An agent that can only take screenshots through an OAuth-scoped connection is a narrower thing to trust than one holding a general API key, and the npm skill makes that setup a package install rather than a custom integration. The 20 percent yearly discount and monthly credit refresh make the cost predictable once you know your capture volume.

Access is freemium. The free tier gives 100 credits a month with no card required. Paid plans run from Startup at $29 a month for 2,000 credits, through Pro at $99 for 10,000 and Business at $199 for 30,000, up to Prime at $499 for 90,000, with 20 percent off on yearly billing and credits refreshing monthly. Contact is hello@scrinly.com.