Use Playwright with BrowserCat’s hosted Chromium: connect to its WebSocket endpoint, navigate to each URL, and save a screenshot before moving to the next. BrowserCat documents the connection and single-page capture; a URL loop is an implementation pattern, not a verified BrowserCat bulk-screenshot endpoint.
Capture multiple URLs with BrowserCat and Playwright
BrowserCat’s quick start describes creating an account and API key, then connecting Playwright to wss://api.browsercat.com/connect with the key in an Api-Key header. The cloud session runs Chromium. The example below applies the documented navigation and screenshot operations to a list, sequentially. BrowserCat quick start
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Install playwright-core in a Node.js project and set BROWSERCAT_API_KEY in the environment. Create the output directory before running the script; Node’s screenshot call does not create parent directories.
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const urls = [
'https://example.com/',
'https://example.org/',
];
async function captureAll() {
const browser = await pw.chromium.connect(
'wss://api.browsercat.com/connect',
{ headers: { 'Api-Key': process.env.BROWSERCAT_API_KEY } },
);
try {
const context = await browser.newContext();
const page = await context.newPage();
for (const [index, url] of urls.entries()) {
try {
await page.goto(url, { waitUntil: 'load', timeout: 30_000 });
await page.screenshot({
path: `screenshots/page-${index + 1}.png`,
fullPage: true,
});
console.log(`Saved ${url}`);
} catch (error) {
console.error(`Screenshot failed for ${url}`, error);
}
}
} finally {
await browser.close();
}
}
captureAll().catch(console.error);The connection, navigation, and capture calls follow BrowserCat’s documented quick-start pattern. The loop, output filenames, full-page option, timeout, and per-URL error handling are choices in this example, so test them with your sites and runtime. Keep the API key out of source control.
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Prepare and run the script
- Install the Playwright Core package in your project with
npm install playwright-core. - Create a
screenshotsdirectory in the project, for example withmkdir -p screenshotson macOS or Linux. - Set
BROWSERCAT_API_KEYin your shell or secret manager. Do not hard-code it in the script. - Replace the sample URLs with the pages you want to capture, then run the file with Node.js.
- Check the output directory and the console. A failed URL is reported and does not stop later URLs from being attempted.
Choose when each page is ready to capture
waitUntil: 'load' waits for the browser’s load event, which is a useful starting point but does not guarantee that every site’s dynamically rendered content is ready. For JavaScript-heavy pages, wait for a meaningful page element or application condition before calling screenshot(). A fixed delay can help when no reliable condition is available, but it adds time to every capture and may still be too short or unnecessarily long. BrowserCat’s quick start demonstrates page-load waiting; it does not prescribe one universal wait policy. BrowserCat quick start
Use fullPage: true when you need the page beyond the current viewport. For a viewport-only capture, omit it or set it to false. Test long or unusual pages: full-page output can be large, and page layout may change as content loads.
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Sequential capture or bounded parallelism?
Start sequentially
The sample processes one URL at a time using one page. This is easy to reason about, limits simultaneous work, and isolates failures: the catch inside the loop logs a failed URL and proceeds to the next. It is a practical starting point for modest lists or when target sites have uncertain behavior.
Increase throughput carefully
If sequential processing is too slow, use a bounded worker pool rather than launching every URL at once. Limit the number of simultaneous pages, record which URLs failed, and test concurrency against both your BrowserCat account and the sites being captured. BrowserCat’s pricing page displays 1,000 concurrent requests for its plans, but that headline is not a recommended worker count or a guarantee for an individual screenshot script. BrowserCat pricing
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Understand BrowserCat credit use and batch limits
The BrowserCat pricing page, at the time reflected in the published details cited here, listed a Hobby plan at $0 per month with 1,000 credits per month and $0.0025 per extra credit, and a Business plan at $50 per month with extra credits at $0.00175. It said WebSocket activity costs one credit per 30 seconds, rounded up, while successful Utility API requests cost one credit each. These are vendor-published, time-sensitive plan terms; check the live page before budgeting or purchasing. BrowserCat pricing
The pricing page also describes soft and hard usage limits. Requests are rejected at the hard limit until the billing period resets or limits are increased, so monitor usage during large runs and treat navigation failures as possible rather than assuming every URL will succeed. The documented workflow here repeatedly uses Playwright operations; it does not establish a dedicated BrowserCat bulk screenshot endpoint.
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Troubleshoot common failures
- Connection or authentication fails: Confirm that the API key is present in
BROWSERCAT_API_KEYand that the header name is exactlyApi-Key. Check that the endpoint iswss://api.browsercat.com/connectand that your account key is active. Do not print the key in logs. - The script cannot save a file: Ensure the
screenshotsdirectory exists and that the process has permission to write there. Adjust the output path if you run the script from a different working directory. - A navigation times out: The site may be slow, unreachable, or waiting on resources that do not settle within 30 seconds. Check the URL and site accessibility, then adjust the per-navigation timeout if appropriate. Keep failures logged so one slow page does not silently erase the rest of the batch.
- The screenshot is missing late-loading content: The load event may have fired before the application finished rendering. Wait for a selector or other site-specific readiness condition before capturing.
- The wrong amount of the page appears: Check whether the desired output is viewport-only or full-page and set
fullPageaccordingly. Verify that lazy content has loaded before taking a full-page capture. - Later URLs do not run after an error: Keep the per-URL
try/catchinside the loop. If you move error handling outside it, a thrown navigation or screenshot error can end the batch early. - Requests stop during a large run: Review account usage and limits on the pricing page; requests may be rejected at a hard usage limit. Reduce the batch size, wait for reset, or adjust limits as applicable to your account.
Use BrowserCat MCP for an agent-driven single-page capture
BrowserCat’s MCP server documents a screenshot action for the current page or a CSS-selected element, with width and height inputs that default to 800 by 600. The reviewed documentation does not show a bulk list-of-URLs screenshot action, so a list still needs to be handled through a repeated workflow such as the Playwright loop above. BrowserCat MCP server
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If you need a screenshot per URL without managing a hosted Playwright session, ScreenshotNeo provides a one-request screenshot API. Its API also accepts the parameter names used by other screenshot APIs, which can make switching easier. The code below uses the documented endpoint and saves the response as a WebP file; see the ScreenshotNeo documentation for request options.
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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpScreenshotNeo accepts cookie and consent banners before capture and removes more than 60 known consent platforms, newsletter popups, and chat widgets; each of those steps can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify the page verdict and billing status in headers. Its MCP server offers take_screenshot, get_page_info, and capture_pdf for AI agents. The Free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots.
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Frequently asked questions
Does BrowserCat have a batch screenshot API?
The documentation cited here establishes single-page Playwright capture and an MCP screenshot action, not a dedicated endpoint that accepts a list of URLs. The example processes the list by repeating the single-page operations.
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Can I use Puppeteer instead of Playwright?
BrowserCat’s FAQ says it supports Playwright, Puppeteer, and CDP-based libraries. This walkthrough uses Playwright. BrowserCat FAQ
Is Cloudflare Browser Run’s snapshot endpoint a BrowserCat feature?
No. Cloudflare Browser Run separately documents a /snapshot endpoint that can combine a screenshot with page content; it is a different service, not a BrowserCat endpoint. Cloudflare Browser Run snapshot documentation
Quick Recap
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