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For a staging site protected by HTTP authentication, call Puppeteer’s page.authenticate() with the username and password before navigating, then capture the page with page.screenshot(). This method does not automatically handle a site that asks you to sign in through an application login form; that is a separate authentication flow.
Use Puppeteer for HTTP-authenticated staging sites
Puppeteer documents Page.authenticate() for HTTP authentication. Supply credentials before page.goto(), so the browser can authenticate while requesting the protected page. Keep secrets outside your source code, for example in environment variables provided by your local development environment or CI system.
The script below uses Puppeteer’s documented launch, authentication, navigation, screenshot, and browser-close calls. It is an illustrative composition of those APIs; choose and verify a readiness condition that suits your staging application.
import puppeteer from 'puppeteer';
const browser = await puppeteer.launch();
try {
const page = await browser.newPage();
await page.authenticate({
username: process.env.STAGING_USERNAME,
password: process.env.STAGING_PASSWORD,
});
await page.goto('https://staging.example.com', {
waitUntil: 'networkidle2',
});
await page.screenshot({ path: 'staging.png', fullPage: true });
} finally {
await browser.close();
}Replace the example URL with your staging URL. Set STAGING_USERNAME and STAGING_PASSWORD in the process environment before running the script. The finally block closes the browser even if navigation or capture fails.
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Choose the screenshot scope and readiness condition
Capture the viewport or the full page
page.screenshot() captures a page screenshot. Set fullPage: true to capture beyond the current viewport; omit it or set it to false for a viewport capture. The API reference documents PNG as the default screenshot type and supports options including path, type, and clip. Consult the current ScreenshotOptions reference for option behavior and defaults.
Wait for the page state you need
The example waits for networkidle2, but no single navigation wait condition guarantees that every application is visually ready. A page may continue making network requests, or it may render important content after navigation completes. Select a wait condition appropriate to the site, then verify that the content you intend to capture has appeared and settled before taking the screenshot.
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Capture one element
For a specific region, locate the intended element and call its screenshot() method instead of capturing the whole page. Puppeteer scrolls the element into view if needed. The call throws if the element has been detached from the DOM, so wait until the target exists and is stable before capture. See the ElementHandle.screenshot() reference.
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Know what authentication method the site uses
HTTP authentication
Use page.authenticate() when the staging server protects requests with HTTP authentication. Puppeteer notes that enabling this method turns on request interception behind the scenes, which may affect performance. See the Page.authenticate() documentation.
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An application sign-in form
A page with a username-and-password form is not necessarily using HTTP authentication. page.authenticate() is not a universal login-form handler. The steps for an application login depend on that application’s form and session behavior, which the Puppeteer HTTP-authentication documentation does not define. Identify the site’s authentication mechanism before adapting the script.
Custom request headers
page.setExtraHTTPHeaders() sends configured headers with page requests, but it is not a universal replacement for HTTP authentication. Whether a header works depends on the server’s authentication scheme. See the Page.setExtraHTTPHeaders() documentation.
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Troubleshoot common capture failures
- The screenshot shows an access-denied or sign-in page: confirm that the site uses HTTP authentication, that both environment variables are set correctly, and that authentication is configured before navigation. If the page presents an application login form, this HTTP-authentication example does not cover that flow.
- The screenshot is blank or missing expected content: check the page’s actual rendered state and adjust the wait condition or wait for the relevant content before capture. Navigation completion alone does not establish that the application is ready.
- Element capture throws: the target may have detached from the DOM. Wait for the element to appear and remain attached before calling its screenshot method.
- The run is slower after adding authentication: Puppeteer documents that
page.authenticate()enables request interception behind the scenes and that this may affect performance.
Or skip the browser setup
ScreenshotNeo can return a screenshot with one GET request. For example, this cURL call captures the public Stripe homepage; replace the URL with a page your API key is authorized to access. See the ScreenshotNeo API documentation for request options.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webp- It accepts cookie and consent banners before capture and removes more than 60 known consent platforms, newsletter popups, and chat widgets; each step can be turned off.
- Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed; response headers report the page verdict and billing status.
- An MCP server provides
take_screenshot,get_page_info, andcapture_pdftools for AI agents and MCP clients. - The Free plan includes 1,000 screenshots per month with no card required; paid plans start at $5 for 3,000 screenshots.
Sign up for ScreenshotNeo’s free plan to get 1,000 screenshots a month with no card.
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Frequently Asked Questions
Does Puppeteer’s HTTP authentication setup work with every staging login?
No. It is for HTTP authentication, not a universal way to submit an application’s sign-in form.
Can I save a Puppeteer screenshot in a format other than PNG?
Puppeteer’s screenshot options include a type setting; check the current API reference for supported types and defaults.
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