Scrnpix
Pure Functional

Capture screenshots in Haskell

Add screenshot and scrolling GIF capabilities to your Haskell applications with http-conduit. Type-safe, pure functional, no headless browsers to manage.

Get API KeyView Docs

Installation

  1. 1Add http-conduit to package.yaml or cabal file
  2. 2Get your API key from the dashboard
  3. 3Set the X-KEY header in your requests

Authentication

Include your API key in the X-KEY header with every request:

import Network.HTTP.Simple

let request = setRequestHeader "X-KEY" ["your-api-key"]
            $ parseRequest_ url
response <- httpBS request

Haskell Screenshot Example

Capture a screenshot or create a scrolling GIF animation with a simple GET request:

Screenshot
{-# LANGUAGE OverloadedStrings #-}
import Network.HTTP.Simple
import qualified Data.ByteString.Lazy as BL

main :: IO ()
main = do
    let request = setRequestHeader "X-KEY" ["your-api-key"]
                $ parseRequest_ "https://api.scrnpix.com/screenshot?url=https%3A%2F%2Fexample.com&width=1280&height=720&format=png"
    response <- httpLBS request
    BL.writeFile "screenshot.png" (getResponseBody response)
Animation
{-# LANGUAGE OverloadedStrings #-}
import Network.HTTP.Simple
import qualified Data.ByteString.Lazy as BL

main :: IO ()
main = do
    let request = setRequestHeader "X-KEY" ["your-api-key"]
                $ parseRequest_ "https://api.scrnpix.com/animate?url=https%3A%2F%2Fexample.com&scroll_duration=3000&scroll_easing=ease-in-out"
    response <- httpLBS request
    BL.writeFile "animation.gif" (getResponseBody response)

Response Format

On success, the API returns the image binary data directly in the response body.

Status Code200 OK
Content-Typeimage/png, image/jpeg, or image/gif
BodyBinary image data (ByteString)
Error ResponseError message with 4xx/5xx status

Key Features

Zero Setup

No need to install webdriver bindings. Just use http-conduit for type-safe HTTP calls.

Production Ready

Built on Cloudflare Workers with global edge network. Handles concurrency and browser lifecycle automatically.

Haskell Integration

Type-safe with IO monad. Integrates seamlessly with Yesod, Servant, Scotty, or any Haskell application.

Rich Features

Custom viewport sizes, full page capture, PNG/JPEG formats, scrolling GIFs with 15 easing functions.

Frequently Asked Questions

Do I need to install any browser dependencies for Haskell?

No. Scrnpix runs browsers on our infrastructure. You only need http-conduit to make HTTP calls.

Can I use this with Yesod or Servant?

Yes. Scrnpix works with any Haskell environment — Yesod, Servant, Scotty, or plain Haskell applications.

How do I handle errors in Haskell?

Check the response status code with getResponseStatusCode. A 200 status means success. Use Either or ExceptT for error handling.

What GHC version is required?

GHC 8.10+ with http-conduit support. The API is a simple HTTP GET request.

Ready to capture screenshots in Haskell?

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