PageCrawl.io’s Custom JavaScript can prepare a monitored page before extraction, but it does not itself take or return a screenshot. To capture one, configure a PageCrawl monitor, then retrieve its screenshot through the documented API or a supported integration. Keep the JavaScript action separate from the screenshot-retrieval code, and check the live API reference for the current endpoint and response format before implementing requests.
What PageCrawl JavaScript does—and does not do
PageCrawl runs Custom JavaScript in the browser context during a check, after the page loads and before tracked elements are extracted. Use it to change page state or perform multi-step interactions that need to happen before monitoring. The action is for side effects: its return value is ignored, and it does not call a screenshot API or return an image.
PageCrawl describes screenshot capture and storage as monitor outputs, separately from page-side actions. Its product page says it supports full-page screenshot capture and storage; unlimited screenshot storage is an Enterprise upgrade. See the PageCrawl product page.
As PageCrawl’s help article on JavaScript tracked elements and actions puts it: “Custom JavaScript actions let you run JavaScript code on the page as part of the action sequence, before the tracked elements are extracted.”
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Prepare the page with a Custom JavaScript action
- Open the monitored page’s settings in PageCrawl and add an action under Actions.
- Select Custom JavaScript and write code to perform the page-state change or interaction needed before extraction.
- For a simple click, wait, typing action, or select, prefer PageCrawl’s native action type. Use Custom JavaScript when the sequence is multi-step or requires framework-specific events.
- For a sequence with delays, use an async IIFE and await only the necessary steps. Keep the work within the documented 30-second safety timeout for JavaScript actions.
- Save the monitor and confirm that its tracked elements reflect the intended page state.
Example pattern for a sequence you adapt to the page’s own selectors and interactions:
(async () => {
const button = document.querySelector('[data-consent="accept"]');
if (button) {
button.click();
await new Promise(resolve => setTimeout(resolve, 500));
}
})();This illustrates an in-page side effect only. It is not a PageCrawl screenshot call. Selectors are site-specific; if the target element is absent, the conditional makes this example a no-op.
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Retrieve the screenshot through PageCrawl’s API
PageCrawl’s developer guide says its API reference covers diffs and screenshots. Because the precise screenshot endpoint and response schema are not established here, do not guess a URL path, payload field, or whether a response contains image bytes or a URL. Use the current authenticated API reference or the exact request generated by your configured monitor.
- Create and configure the monitor in the PageCrawl dashboard first.
- Enable developer mode and copy the request the dashboard uses. The developer guide recommends generalizing this request in a script once the monitor is configured.
- Check the live API reference for the screenshot operation, required monitor identifier, query or body parameters, response type, and any screenshot-selection options. PageCrawl says the API reference generated from its OpenAPI specification takes precedence if it conflicts with the guide.
- Make the request from a trusted server-side integration. PageCrawl API requests use a Bearer token in the
Authorizationheader. - Handle the response according to the live schema: for example, store image bytes or retrieve a returned image URL only if the endpoint documents that response.
A safe structural pattern—not a runnable endpoint request, since the exact path and schema must come from PageCrawl’s live reference—is:
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const response = await fetch(PAGECRAWL_DOCUMENTED_SCREENSHOT_URL, {
headers: {
Authorization: `Bearer ${process.env.PAGECRAWL_API_TOKEN}`
}
});
if (!response.ok) {
throw new Error(`PageCrawl request failed: ${response.status}`);
}
// Parse or store the response using the documented response schema.Replace PAGECRAWL_DOCUMENTED_SCREENSHOT_URL with the exact URL and required parameters shown in the current API reference. The placeholder is deliberately not a fabricated endpoint. Keep the token in a server-side environment variable; do not ship a reusable secret in browser JavaScript or expose it in logs. The developer guide discusses a query-string quick-test option but warns against putting tokens in scripts and logs.
Choose between the API and an event-driven integration
| Route | Best fit | What to verify |
|---|---|---|
| PageCrawl API | A custom JavaScript or Node.js service where you control request timing and downstream processing. | Current endpoint, authentication, response format, monitor/screenshot selection, and error handling in the live API reference. |
| Make.com integration | An event-triggered workflow that routes a monitor change and its screenshot image URL to a downstream destination. | Current integration availability, trigger setup, payload field, and access requirements. |
PageCrawl’s Make.com article describes a change trigger and a screenshot image URL field. It was published June 21, 2026, and last updated August 20, 2026; its note that the app was available by invitation while completing Make review is dated information, not a guarantee of current availability. Check the current integration page before building a workflow around it.
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Timeouts, browser mode, and reliability
- JavaScript action limit: PageCrawl documents a 30-second safety timeout for Custom JavaScript actions and JavaScript tracked elements. Keep actions short; a timeout can prevent the intended state change or extraction.
- Overall check limits: The same help article lists 45 seconds for Free, 90 seconds for Standard, and 180 seconds for Enterprise and Ultimate. These are plan-level figures from the documentation and may change, so check the current plan details.
- Browser requirement: JavaScript actions require a real browser engine and are not compatible with Fast mode. Choose a browser-backed check if the action is needed.
- Waits: Use the smallest delay that reliably allows the page transition to finish. Long fixed delays consume the action window; where possible, wait for a meaningful page state rather than sleeping blindly.
- Storage: PageCrawl’s product page identifies unlimited screenshot storage as an Enterprise upgrade. Confirm current retention and storage details for your plan if you need a history of captures.
Troubleshooting
- The action runs but no screenshot is returned: The action only prepares the page. Retrieve the screenshot separately using the monitor’s documented API operation or an integration payload.
- The page remains in the original state: Check that the selector exists at action time and that the action occurs after load. For multi-step interactions, await the transition before extraction.
- The action times out: Reduce unnecessary waits and work, and keep the complete JavaScript action within 30 seconds. Check the plan’s overall check timeout as well.
- JavaScript does not run in Fast mode: Switch to a real browser engine; PageCrawl documents that Custom JavaScript actions are incompatible with Fast mode.
- An API request returns an authorization error: Verify the Bearer token and its server-side configuration. Do not move the token into public browser code as a workaround.
- The API URL or response does not match an example: Use the current API reference and the dashboard’s developer-mode request rather than relying on guessed endpoint paths or stale examples.
- The Make.com app is unavailable: Check PageCrawl’s current integration instructions; the invitation-only note in its August 20, 2026 update may no longer describe the current status.
Or skip the browser setup
If you need a direct screenshot API rather than PageCrawl’s monitor-and-artifact workflow, ScreenshotNeo accepts a URL in one GET request and can return PNG, JPEG, WebP, or PDF. Its clean-shot steps can accept consent banners and remove more than 60 known consent platforms, newsletter popups, and chat widgets; each step can be turned off. Bot checks, blank pages, failed loads, timeouts, and cache hits are not billed, and responses report the page verdict and billing status in headers. It also offers an MCP server with take_screenshot, get_page_info, and capture_pdf tools for AI agents.
cURL example (see the ScreenshotNeo documentation):
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpPython:
import requests
r = requests.get(
"https://api.screenshotneo.com/v1/shot",
params={"access_key": "YOUR_API_KEY", "url": "https://example.com"},
timeout=90,
)
open("shot.webp", "wb").write(r.content)Node.js:
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://example.com' });
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);ScreenshotNeo’s Free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots. Sign up for the free plan to try it.
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Frequently Asked Questions
Can a PageCrawl Custom JavaScript action save a screenshot file?
No. It runs in the monitored page before extraction and is intended for side effects; screenshot capture and retrieval are separate monitor outputs.
Can I call PageCrawl’s screenshot API directly from front-end JavaScript?
Do not expose a reusable Bearer token in public browser code. Make authenticated requests from a trusted server-side component.
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