Developer Docs

Making an API request

The url format for making a screenshot request to's API is:


  • YOUR_API_KEY should be replaced by your actual urlbox API key which you can get by registering for an account.
    (If you have already registered, you can find your API Key by logging in to your account.)

  • GENERATED_TOKEN should be replaced by a hash which is generated server side by taking the HMAC SHA1 of the query string and signing it with your API Secret.
    Example code is below to get you started in no time

  • FORMAT should be one of either png or jpg depending on which format you want the resulting image

  • REQUEST_OPTIONS should be replaced by a query string that contains all of the options you want to set.
    A table of all options and their defaults are shown below

An example, valid urlbox url is shown below, with the following options:

  • format is set to png
  • url is set to
  • thumb_width is set to 600 pixels wide
  • ttl is set to 108000 seconds which is equivalent to 1 day, meaning the screenshot will be freshly generated once daily

Simply putting this url as the src attribute in a normal img tag, the resulting image is: screenshot API showing a screenshot thumbnail of

Request Options

Below is a table listing all of the available options to the API.
Combine these options as parameters in the query string for e.g. ?


URL-encoded target url Required

width1280Viewport width of the browser in pixels
height1024Viewport height of the browser in pixels
thumb_width-Width in pixels of the generated thumbnail, leave off for full-size screenshot
user_agent-User-Agent string used to emulate a particular client.
delay-Amount of time to wait in milliseconds before urlbox takes the screenshot
full_pagefalseSpecify whether to capture the full-length of the website
forcefalseTake a fresh screenshot instead of getting a cached version
ttl2592000 (30 days)Short for 'time to live'. Number of seconds to keep a screenshot in the cache. Note the default is also the maximum value for this option.
quality80JPEG only - image quality of resulting screenshot (0-100)
disable_jsfalseTurn off javascript on target url to prevent popups
retinafalseTake a 'retina' or high definition screenshot equivalent to setting a device pixel ratio of 2.0 or @2x. Please note that retina screenshots will be double the normal dimensions and will normally take slightly longer to process due to the much bigger image size.

Example Code

Sample code is available in the following languages.
If you would like help integrating our API with your language please get in touch


Sample code to take website screenshots in Node.js

// npm install urlbox --save

import Urlbox from 'urlbox';

// Plugin your API key and secret
const urlbox = Urlbox(YOUR_API_KEY, YOUR_API_SECRET);

// Set your options
const options = {
  url: '',
  thumb_width: 600,
  format: 'jpg',
  quality: 80

const imgUrl = urlbox.buildUrl(options);

// Now set it as the src in an img tag to render the screenshot
<img src={imgUrl} />


Sample code to take website screenshots in Ruby

# ruby gem coming soon
require 'openssl'
require 'open-uri'

def encodeURIComponent(val)
def urlbox(url, options={}, format='png')
  urlbox_apikey = 'YOUR_API_KEY'
  urlbox_secret = 'YOUR_API_SECRET'
  query = {
    :url         => url, # required - the url you want to screenshot
    :force       => options[:force], # optional - boolean - whether you want to generate a new screenshot rather than receive a previously cached one - this also overwrites the previously cached image
    :full_page   => options[:full_page], # optional - boolean - return a screenshot of the full screen
    :thumb_width => options[:thumb_width], # optional - number - thumbnail the resulting screenshot using this width in pixels
    :width       => options[:width], # optional - number - set viewport width to use (in pixels)
    :height      => options[:height], # optional - number - set viewport height to use (in pixels)
    :quality     => options[:quality] # optional - number (0-100) - set quality of the screenshot
  query_string = query.
    sort_by {|s| s[0].to_s }.
    select {|s| s[1] }.       
    map {|s| {|v| encodeURIComponent(v.to_s) }.join('=') }.
  token = OpenSSL::HMAC.hexdigest('sha1', urlbox_secret, query_string)

### USAGE: (format can be png or jpg, we default to png) ###
url = urlbox("", {thumb_width: 200, full_page: true, quality: 90}, 'jpg')
puts url
# url: ""


Sample code to take website screenshots in PHP

# php package coming soon
function urlbox($url, $args)
    $URLBOX_APIKEY = "xxx-xxx";
    $URLBOX_SECRET = "xxx-xxx";
    $options['url'] = rawurlencode($url);
    $options += $args;
    foreach ($options as $key => $value) {
        $_parts[] = "$key=$value";
    $query_string = implode("&", $_parts);
    $TOKEN = hash_hmac("sha1", $query_string, $URLBOX_SECRET);
    return "$URLBOX_APIKEY/$TOKEN/png/?$query_string";
$options['width'] = "1024";
$options['height'] = "768";
$options['full_page'] = 'true';
$options['force'] = 'true';
$apicallUrl = urlbox("", $options);
echo $apicallUrl;
function getResource($url)
    // initialize a handle
    $chandle = curl_init();
    // set URL
    curl_setopt($chandle, CURLOPT_URL, $url);
    // return results a s string
    curl_setopt($chandle, CURLOPT_RETURNTRANSFER, 1);
    // execute the call
    $result = curl_exec($chandle);
    return $result;
$content = getResource($apicallUrl);
echo $content;


Sample code to take website screenshots in Python

#pypy package coming soon

import hmac
from hashlib import sha1
import urllib
def urlbox(args):
    apiKey = "xxx-xxx"
    apiSecret = "xxx-xxx"
    queryString = urllib.urlencode(args)
    hmacToken =, queryString, sha1)
    token = hmacToken.digest().encode('hex')
    return "" % (apiKey, token, queryString)

argsDict = {'url' : ""};
print urlbox (argsDict)


Sample code to take website screenshots in Java

import java.math.BigInteger;
import java.util.Map;
import java.util.HashMap;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class Urlbox { 

  private String key;
  private String secret;

  Urlbox(String api_key, String api_secret) {
    this.key = api_key;
    this.secret = api_secret;

  // main method demos Example Usage
  public static void main(String[] args) { 
    String urlboxKey = "your-urlbox-api-key";
    String urlboxSecret = "your-urlbox-secret";

    // Set request options
    Map<String, Object> options = new HashMap<String, Object>();
    options.put("width", 1280);
    options.put("height", 1024);
    options.put("thumb_width", 240);
    options.put("full_page", "false");
    options.put("force", "false");

    // Create urlbox object with api key and secret
    Urlbox urlbox = new Urlbox(urlboxKey, urlboxSecret);
    try {
      // Call generateUrl function of urlbox object
      String urlboxUrl = urlbox.generateUrl("", options);
      // Now do something with urlboxUrl.. put in img tag, etc..
    } catch (UnsupportedEncodingException ex) {
      throw new RuntimeException("Problem with url encoding", ex);

  public String generateUrl(String url, Map<String,Object> options) throws UnsupportedEncodingException {

    String encodedUrl = URLEncoder.encode(url, "UTF-8");
    String queryString = String.format("url=%s", encodedUrl);

    for (Map.Entry<String, Object> entry : options.entrySet()) {
      String queryParam = "&"+entry.getKey()+"="+entry.getValue(); 
      queryString += queryParam;

    String token = generateToken(queryString, this.secret);
    String result = String.format("", this.key, token, queryString);
    return result;
  private String generateToken(String input, String key) {
    String lSignature = "None";
    try {
      Mac lMac = Mac.getInstance("HmacSHA1");
      SecretKeySpec lSecret = new SecretKeySpec(key.getBytes(), "HmacSHA1");

      byte[] lDigest = lMac.doFinal(input.getBytes());
      BigInteger lHash = new BigInteger(1, lDigest);
      lSignature = lHash.toString(16);
      if ((lSignature.length() % 2) != 0) {
        lSignature = "0" + lSignature;
    } catch (NoSuchAlgorithmException lEx) {
      throw new RuntimeException("Problems calculating HMAC", lEx);
    } catch (InvalidKeyException lEx) {
      throw new RuntimeException("Problems calculating HMAC", lEx);
    return lSignature;


Sample code to take website screenshots in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Security.Cryptography;
using System.IO;
public class Urlbox {
  public string urlGenerator(string url) {
    var urlboxApiKey = "xxx-xxx";
    var urlboxApiSecret = "xxx-xxx";
    var encodedUrl = HttpUtility.UrlEncode(url);
    byte[] key = Encoding.ASCII.GetBytes(urlboxApiSecret);
    var queryString = string.Format("url={0}", encodedUrl);
    var uniqueHash = generateHash(queryString, key);
    return string.Format("{0}/{1}/png/?{2}", urlboxApiKey, uniqueHash, queryString );           

  public static string generateHash(string input, byte[] key) {
    HMACSHA1 myhmacsha1 = new HMACSHA1(key);
    byte[] byteArray = Encoding.ASCII.GetBytes(input);
    MemoryStream stream = new MemoryStream(byteArray);
    return myhmacsha1.ComputeHash(stream).Aggregate("", (s, e) => s + String.Format("{0:x2}", e), s => s);