The Sauce Labs Cookbook

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Front End Performance Testing


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We expose all of our captured performance data, including the calculated baselines via our API. You can use it to build your own internal performance dashboards to have a more custom overview on your performance data.

Chrome Only

This feature is available only for testing web applications with the Google Chrome browser.

Enterprise Plans Only

This feature is available for Enterprise plans only. For more information about other benefits that are included with Enterprise plans, check out our Pricing page.

See the following sections for more information: 

Download Data

Currently we only provide a package in Node.js to access the data via a programmable interface. You can always use a curl command to access the API.

Using node-saucelabs

If you want to use Node.js you can use our saucelabs NPM package to access the API endpoints. The package does not only have an interface to access performance data but also other Rest API endpoints.

You can install the package via:

Install node-saucelabs
$ npm install saucelabs

You can then, e.g. fetch the performance data of a test via:

Performance API Query Example
const SauceLabs = require('./build').default

const api = new SauceLabs({
    user: process.env.SAUCE_USERNAME,
    key: process.env.SAUCE_ACCESS_KEY,

    { full: true }
    (data) => console.log(JSON.stringify(data, null, 4))
     * outputs:
     * {
         "items": [{
             "job_id": "73b1ad4e397e48cbb972e07018280260",
             "job_owner": "cb-onboarding",
             "job_name_hash": "df6f7aaaf4e4ec9a2a503b9360a2cf0ce607262d",
             "metric_data": {
                 "firstVisualChange": 494,
                 "score": 0.9996662118223446,
                 "speedIndex": 1436,
             "page_url": "",
             "links": {
     * }

You can find more information on other supported functions in the package documentation.

Using CURL

To query the data using the curl command, run:

Curl Example

API Documentation


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