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To connect PageCrawl.io to a Node.js app, create an API token in PageCrawl, store it in a server-side environment variable, and send it as a Bearer token to POST https://pagecrawl.io/api/track-simple. Then choose polling, webhooks, or both to receive monitor updates. API access is available on PageCrawl’s Free plan, though the number of pages and check frequency depend on the plan.
Create and protect a PageCrawl API token
- In PageCrawl, open Settings > API > API Tokens and create a token.
- Copy it immediately; the help article says it will not be shown again.
- Store it in a server-side environment variable or secret manager. Do not put it in browser-side JavaScript, a URL, source control, or logs.
PageCrawl accepts the token in the Authorization: Bearer header. Its integration guide also says OAuth access tokens can be used. The query-string api_token option is described only for quick browser tests; use the Bearer header for an application. See PageCrawl’s integration guide and API and webhook guide.
Create your first monitor with Node.js
This example uses the built-in fetch available in modern Node.js releases. Set PAGECRAWL_API_TOKEN in your server environment before running the code.
const response = await fetch("https://pagecrawl.io/api/track-simple", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.PAGECRAWL_API_TOKEN}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
url: "https://example.com/pricing",
tracking_mode: "fullpage",
}),
});
if (!response.ok) {
const detail = await response.text();
throw new Error(`PageCrawl HTTP ${response.status}: ${detail}`);
}
const page = await response.json();
console.log(`Monitoring: ${page.name} (${page.id})`);The documented quick-start route is POST /api/track-simple. Its response includes the created monitor’s name and ID. PageCrawl’s developer guide describes a newly created monitor as returning HTTP 201; check the current API reference if a response shape or status differs from an example. Consult the official API and webhooks guide for the request and response details.
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Set the token without committing it
For a local shell session, export the token before launching your Node.js process, or load it through your deployment platform’s secret settings. Avoid printing process.env.PAGECRAWL_API_TOKEN while debugging. If the token is exposed, revoke it in PageCrawl and replace it in the environment where your application runs.
Choose a tracking mode
The mode determines what PageCrawl tracks from the target page. The official guide lists these options; confirm accepted values and exact request shapes in the current API reference before depending on a less common mode.
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| Mode | Use it for |
|---|---|
fullpage |
All visible text; documented as the default. |
content_only |
Page content with navigation, header, and footer stripped out. |
reader |
Reader-mode content extraction. |
price |
Price detection. |
specific_text |
Text matched using a selector. |
specific_number |
A number matched using a selector. |
feed |
Repeated listings. |
seo |
SEO data including title, meta, canonical, robots, and Open Graph fields. |
The integration and developer references are available at Advanced Integrations and API and Webhooks. PageCrawl describes its full API reference as generated from its OpenAPI specification.
Choose polling, webhooks, or a hybrid
Polling is straightforward when a dashboard or report can update periodically. Webhooks suit automation that should react soon after a change. A hybrid setup uses webhooks for prompt updates and a slower poll to reconcile state after an outage or missed delivery.
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- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
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| Pattern | Choose it when | Operational consideration |
|---|---|---|
| Polling | Periodic refresh is acceptable. | Account for pagination and request volume; respect rate limits and Retry-After. |
| Webhooks | Changes should trigger near-real-time work. | Expose a receiver, authenticate the signature against raw request bytes, and acknowledge promptly. |
| Hybrid | Missing an event during downtime would matter. | Reconciliation adds requests, but can repair state that webhook delivery alone did not update. |
Polling monitors
PageCrawl’s Node.js example polls GET /api/pages?simple=1, follows links.next for pagination, and reads the latest result from latest.contents. Where individual tracked elements are involved, it maps values using stable element_id values. Do not assume the first page contains every monitor: follow the supplied next link until there are no more results.
Receiving webhook events
Configure a webhook with your public receiver URL and the event filters you need. Verify each incoming request before trusting its payload. PageCrawl’s example computes HMAC-SHA256 from the timestamp, a period, and the exact raw request body, then compares the supplied X-PageCrawl-Signature using crypto.timingSafeEqual and rejects stale timestamps.
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In a Node.js web server, capture the raw body before JSON parsing. Parsing and re-serializing JSON can change whitespace or byte representation, causing a valid signature check to fail. After signature and timestamp validation, return a 2xx response promptly and send longer processing to a queue. The API/webhook guide says failed deliveries are retried with backoff and a 2xx response acknowledges delivery. Follow its current Node.js example for the exact header encoding and comparison details: PageCrawl API and webhooks.
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PageCrawl lists limits of 60 requests per minute for Free API accounts and 300 requests per minute for paid accounts (PageCrawl.io, 2026). These are product limits, not performance benchmarks. If you receive HTTP 429, wait for the duration specified by the Retry-After response header rather than retrying immediately. Add a bounded retry policy so a prolonged failure does not create an unending request loop.
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The REST API and webhooks are available on every plan, including Free. The published Free plan lists up to six pages, 220 checks, and a 60-minute check frequency (PageCrawl.io, 2026). Paid tiers have higher limits and frequencies. PageCrawl says checks pause when plan limits are exceeded, so monitor capacity as well as API errors. Prices exclude VAT on the pricing page; the reviewed official materials do not establish India-specific GST, INR billing, or acceptance of every Indian-issued card. Check the current PageCrawl pricing page for live plan limits, billing, and tax details before choosing a plan.
Troubleshoot common setup failures
- 401 or 403 response: Verify that the token is present in the server environment, has not been revoked, and is sent as
Authorization: Bearer …. Do not put it in the query string for an application request. - 422 validation response: PageCrawl’s developer guide says validation errors include field-level details. Check the URL, tracking mode, and any mode-specific fields against the current API reference.
- 429 response: Pause according to
Retry-After, reduce polling or concurrency, and ensure pagination does not produce a request burst. - Webhook signature mismatch: Ensure the server verifies the exact raw body bytes and the timestamp used to sign them. Run raw-body capture before JSON middleware; do not compare signatures with ordinary string equality.
- Webhook work runs twice or arrives late: Treat delivery as potentially retried. Make processing idempotent where possible, acknowledge validated deliveries quickly, and reconcile stored monitor state with a slower poll if missed updates matter.
- Monitor stops updating despite successful API calls: Check whether the account has exceeded its page or check allowance; PageCrawl says checks pause after plan limits are exceeded.
Or skip the browser setup
If your actual need is a clean screenshot or PDF of a website rather than change monitoring, ScreenshotNeo offers a one-request screenshot API. This example saves a WebP response:
Quick Recap
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo documentation for request options. Cookie banners, popups, and chat widgets are removed before the shot; bot checks, blank pages, and failed loads are never billed. An MCP server lets AI agents take screenshots, and 1,000 screenshots per month are free with no card; paid plans start at $5 for 3,000. Sign up for the free plan.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
