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Use Node.js fetch to send a request to the screenshot provider’s documented endpoint, then handle the response in the format that provider returns. Keep the API key on your server, check for HTTP errors before parsing a response, and do not assume another provider uses the same request fields or returns the same kind of result.
Make a screenshot request from Node.js
For a JSON-based screenshot API, the basic flow is: send the target URL and capture settings, check the response status, and parse the documented response body. This example follows Screenshot API’s published contract: a POST to its screenshot endpoint with Bearer authentication, followed by JSON containing a screenshot URL. It is illustrative and has not been independently tested; check the provider’s current documentation before using it.
- Keep your key server-side. Set an environment variable named
SCREENSHOT_API_KEYin your server environment or secret manager. Do not put it in browser code or commit it to source control. - Save this as an ES module such as
screenshot.mjs, then run it with Node.js that supports the built-infetchAPI. - Replace the example URL with the page you need to capture and run
node screenshot.mjs.
const apiKey = process.env.SCREENSHOT_API_KEY;
if (!apiKey) throw new Error('Set SCREENSHOT_API_KEY before running this script.');
const response = await fetch('https://api.screenshot-api.org/api/v1/screenshot', {
method: 'POST',
headers: {
Authorization: `Bearer ${apiKey}`,
'Content-Type': 'application/json',
},
body: JSON.stringify({
url: 'https://example.com',
viewport: { width: 1280, height: 720 },
format: 'png',
fullPage: true,
}),
});
if (!response.ok) {
const detail = await response.text();
throw new Error(`Screenshot request failed (${response.status}): ${detail}`);
}
const result = await response.json();
if (!result.screenshotUrl) {
throw new Error('The response did not contain the documented screenshotUrl field.');
}
console.log(result.screenshotUrl);The endpoint, authentication header, field names, and screenshotUrl response property above are specific to Screenshot API’s documentation, not a universal screenshot API format. That documentation also describes X-API-Key authentication and GET/POST routes; use the method and credential scheme supported by your account and selected route. See the Screenshot API documentation for its request contract.
Parse the response your provider actually returns
A successful HTTP status does not guarantee every API returns JSON or a durable image URL. Check the selected service’s reference for the success body, content type, errors, and output retention.
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- JSON with a URL: Parse with
response.json(), then use the documented property. If the URL is temporary, copy the file to storage you control before it expires; check the provider’s retention terms. - Image bytes: Do not parse the response as JSON. Use
response.arrayBuffer()and write or upload the bytes. For example, in a Node.js script using the built-in file system module, callawait writeFile('shot.png', Buffer.from(await response.arrayBuffer()))after checkingresponse.ok. - SDK output: Follow the installed SDK version’s documented runtime requirements and return type. Screenshot Scout, for example, documents an SDK and a JSON mode whose screenshot URL is at
response.result.screenshotUrl; its default capture flow can return image bytes.
These are distinct contracts. A URL in a JSON object, raw image bytes, and an SDK result object are not interchangeable, even when each represents a successful capture.
Choose capture settings that match the page
Start with the smallest set of options that produces the result your application needs. The following controls appear in the reviewed providers’ documentation, but support, names, constraints, and availability vary by service and may depend on using POST rather than GET.
- Viewport and format: Set the viewport dimensions and choose a documented image format such as PNG, JPEG, or WebP. Check whether the service accepts dimensions as an object or separate fields.
- Full page or a specific region: Full-page mode may capture beyond the initial viewport. Selector-based capture can target one element when supported.
- Wait behavior: A network-idle condition, a selector wait, or a fixed delay can allow dynamic content to appear. A delay adds time to each capture; a selector wait can fail if the page’s markup changes. Use the provider’s exact option names and timeout behavior.
- Rendering details: Depending on the service, options may include device scale factor, dark mode, custom CSS or JavaScript, and extra delay. Do not send unsupported fields and assume they will be honored.
Keep credentials and target URLs within safe boundaries
Protect the API key
Make the screenshot request from your backend rather than exposing the provider key to a browser. Treat generated capture URLs as sensitive if they include credentials: Screenshot Scout warns that “The generated URL contains the access key.” Avoid logging such URLs or returning them to clients unless you have checked the provider’s signing and access controls.
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Check whether the renderer can reach the target
A cloud screenshot service fetches the page from its own environment; it does not automatically inherit your local browser session, cookies, or network access. A page available only on a developer’s machine or behind a logged-in local session may not be reachable. screenshot-api.net specifically cautions that its remote service is unsuitable for pages available only through a local browser session. screenshotapis.org documents blocking private and reserved IP destinations as an SSRF safeguard. Confirm the selected provider’s network and authentication capabilities before designing around private, staging, or session-protected pages.
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Check response.ok before interpreting a response as an image or success object. When a request fails, capture the status and provider error detail safely; do not assume all services use identical status codes, error schemas, retry rules, or quotas.
- Invalid credentials or request: Verify the key, authentication header, endpoint, required fields, and accepted field names against the service reference.
- Rate limit or quota: Some providers return HTTP 429 and rate-limit headers. Screenshot API documents 429 rate-limit or quota errors and response headers; screenshotapis.org says its rate window is per API key and lists a
Retry-Afterheader. Follow the selected provider’s instructions and avoid tight retry loops. - Render failure or timeout: Check whether the target is publicly reachable, whether the page needs more time, and whether the provider returns a distinct render error. Do not retry indefinitely; apply a bounded retry policy suited to the provider’s guidance.
- Unexpected response body: Check the response content type and provider documentation. A JSON parser will fail on raw PNG bytes, while treating a JSON URL response as an image file will save the wrong content.
- Usage and retention: Published plan limits, unit costs, reset rules, and output retention differ and change. Check current pricing and retention terms for your chosen provider; if the result must persist, copy it into storage you control.
For context, Screenshot API’s documentation accessed in 2026 lists 60 requests per minute and 500 screenshots per month on its free plan; ScreenshotAPI’s getting-started documentation accessed in 2026 describes 100 free screenshots per month and unit costs of 1 for PNG/JPG/WebP, 2 for PDF, 1 per second for MP4/WebM with a two-second minimum, and 2 per second for GIF with a three-second minimum. screenshotapis.org’s API reference accessed in 2026 lists a free tier of 10 requests per minute and 100 monthly credits, with listed tiers up to 300 requests per minute and 75,000 monthly credits. These are vendor-published figures, not independent measurements; verify current terms before budgeting.
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Troubleshoot common Node.js integration problems
“Set SCREENSHOT_API_KEY” or authentication errors
If the script reports a missing key, set the environment variable in the same process environment that runs Node.js. If the provider returns an authentication error, confirm whether it expects Bearer authentication, an API-key header, or a query parameter; a valid key sent using the wrong scheme still fails.
HTTP 400 or validation errors
Check the URL and required request fields, then compare option spelling and value types with the provider’s current reference. For instance, field names such as fullPage and full_page are not necessarily aliases.
HTTP 429
Stop sending immediate repeated requests. Read any rate-limit or retry headers, reduce concurrency, and wait according to the provider’s rules. Quota exhaustion may need a plan or usage change rather than a retry.
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JSON parsing fails
Inspect the status and content type before parsing. The service may return image bytes, an error body, or a different JSON shape. Use arrayBuffer() for documented binary output and update property access only after confirming the actual response schema.
The screenshot misses content or times out
Use a supported selector wait, network-idle setting, or delay when the page populates after initial load. Verify that the selector exists on the rendered page. Longer waits may increase latency, while brittle selectors can fail when the site changes.
The remote renderer cannot open the URL
Test whether the page is publicly reachable from outside your network. Localhost, private IPs, firewall-restricted staging sites, and pages dependent on a local login session may be inaccessible or deliberately blocked by the service.
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Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server for developers. Its one-call Node.js example uses the API’s GET endpoint; the full ScreenshotNeo API documentation describes available options.
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);ScreenshotNeo accepts cookie and consent banners before capture and removes more than 60 known consent platforms, newsletter popups, and chat widgets; each cleanup step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, with verdict and billing information in response headers. Its MCP server offers take_screenshot, get_page_info, and capture_pdf for Claude, Cursor, and other MCP clients. The Free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots. Sign up for ScreenshotNeo’s free plan.
FAQ
Can I call a screenshot API directly from browser JavaScript?
Keep the API key on a server. A browser-side request can expose credentials to users; have your backend make the provider call and return only the result your app needs.
Can a screenshot API capture a page that requires my login?
Only if the provider supports a suitable authentication method and can reach the page. A cloud renderer does not automatically share your local browser’s cookies or network access.
Should I use GET or POST?
Use the method documented for your provider and option set. Some services support both, while advanced settings may require POST.
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