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To capture a mobile-sized website screenshot with Abstract’s Website Screenshot API, send a GET request to https://screenshot.abstractapi.com/v1/ with your API key, target URL, and pixel dimensions for the viewport. Set capture_full_page=false if you want only the visible viewport rather than the full page. The 390 × 844 dimensions below are an example, not an official Abstract device preset.
Make a mobile-sized, viewport-only request
Abstract’s Website Screenshot API describes itself as “a simple yet powerful REST API that allows you to request an image of a given URL.” The required query parameters are api_key and url; include the complete target URL, including https:// or http://. Set width and height in pixels, and turn off full-page capture for a screenshot bounded to those viewport dimensions. See the Abstract API documentation for the endpoint and parameter reference.
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GET https://screenshot.abstractapi.com/v1/?api_key=YOUR_UNIQUE_API_KEY&url=https%3A%2F%2Fexample.com&width=390&height=844&capture_full_page=falseIn this example, 390 × 844 is an illustrative viewport choice. Abstract’s documentation does not prescribe a universal mobile device, dimension pair, or mobile user-agent string. Choose dimensions that fit the layout you need to inspect.
Run it with cURL, Python, or Node.js
cURL
This saves the returned image as a JPEG using the documented default format. URL encoding is handled for query values by cURL’s --data-urlencode.
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curl -G "https://screenshot.abstractapi.com/v1/"
--data-urlencode "api_key=YOUR_UNIQUE_API_KEY"
--data-urlencode "url=https://example.com"
--data-urlencode "width=390"
--data-urlencode "height=844"
--data-urlencode "capture_full_page=false"
-o mobile-shot.jpgPython
Install the HTTP client with python -m pip install requests, then run:
import requests
response = requests.get(
"https://screenshot.abstractapi.com/v1/",
params={
"api_key": "YOUR_UNIQUE_API_KEY",
"url": "https://example.com",
"width": 390,
"height": 844,
"capture_full_page": "false",
},
timeout=90,
)
response.raise_for_status()
with open("mobile-shot.jpg", "wb") as image:
image.write(response.content)Node.js
This example uses the built-in fetch API available in current Node.js releases:
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const params = new URLSearchParams({
api_key: 'YOUR_UNIQUE_API_KEY',
url: 'https://example.com',
width: '390',
height: '844',
capture_full_page: 'false',
});
const response = await fetch(
`https://screenshot.abstractapi.com/v1/?${params}`
);
if (!response.ok) {
throw new Error(`Screenshot request failed: ${response.status} ${response.statusText}`);
}
const image = Buffer.from(await response.arrayBuffer());
await import('node:fs/promises').then(fs => fs.writeFile('mobile-shot.jpg', image));Keep the API key on a server or in a protected environment variable in production. Abstract identifies it as the request’s authentication credential, and putting it in browser code or a public repository can expose it.
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Choose viewport-only or full-page output
width and height set the browser viewport dimensions. They do not by themselves decide how much of the page appears in the returned image: capture_full_page controls that scope and defaults to true. Set it to false to capture only the specified viewport; leave it true when you want the full page capture.
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- Viewport screenshot: set
capture_full_page=false. This is useful for inspecting the first visible screen at a chosen mobile-sized viewport. - Full-page screenshot: use
capture_full_page=trueor omit the parameter, as true is the documented default. The returned capture extends beyond the viewport to include the page.
Adjust the request when the page needs it
The documented endpoint is API version 1 and requires TLS 1.2 or greater. These optional parameters can refine a capture; use the exact names shown in the parameter documentation.
| Parameter | What it controls | When to use it |
|---|---|---|
delay |
An optional wait in seconds between page load and capture. | Allow extra time for content that renders shortly after the page loads. |
css_injection |
Optional CSS applied before capture. | Make a temporary visual adjustment for the screenshot. |
user_agent |
An optional user-agent string. | Set a chosen browser/device identity when needed. Abstract does not document one canonical mobile value. |
export_format |
Image format: jpeg or png. |
Choose PNG when that format suits your use; the documented default is JPEG. |
For example, add &export_format=png to the request URL to ask for PNG output. In code, add export_format: 'png' to the query parameters. Encode query values through your HTTP library rather than concatenating arbitrary URLs or CSS directly into a URL.
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What a mobile viewport does—and does not—simulate
A mobile-sized width and height request the page at those viewport dimensions, but that alone does not establish that the site behaves exactly as it would on a physical phone. The API accepts a user-agent value, yet the reviewed documentation does not supply a universal mobile profile or recommended dimensions. If device-specific rendering matters, select and test dimensions and a suitable user-agent for the target site.
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Abstract’s product FAQ says location-specific screenshots are not currently supported. A mobile-sized viewport therefore should not be treated as a way to reproduce region-dependent content. Likewise, the API documentation describes returning an image for the requested URL; do not assume that a private or authenticated page will be captured unless the necessary request setup has been verified for that target.
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Troubleshoot common request problems
- Authentication fails: verify that
api_keyis present and contains the API key, not a placeholder. Keep it private in deployed applications. - The target URL is rejected or wrong: supply a complete URL with its scheme, such as
https://example.com. Use a URL-encoding query builder for values that contain reserved characters. - The image includes the full page: explicitly set
capture_full_page=false; the documented default is full-page capture. - The layout is not the expected mobile version: check the chosen pixel dimensions and, if necessary, the optional
user_agent. There is no single official mobile profile in the reviewed docs. - Content is missing because it renders late: try the optional
delayparameter to give the page additional time before capture. - The output format differs from what you expect: Abstract documents JPEG as the default. Request
export_format=pngfor PNG output. - You need a region-specific version: the vendor says location-specific screenshots are not currently supported; changing viewport dimensions does not provide location targeting.
Or skip the browser setup
If you need a screenshot API with the cleanup and billing behavior described below, ScreenshotNeo is an alternative to Abstract. Its one-call request can produce a mobile viewport capture by setting the viewport dimensions and disabling full-page capture. 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://example.com
-d width=390
-d height=844
-d full_page=false
-o mobile-shot.webpScreenshotNeo removes cookie and consent banners, newsletter popups, and chat widgets before capture; 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 screenshot tools for AI agents, including Claude, Cursor, and other MCP clients. The free plan includes 1,000 screenshots per month with no card required; paid plans start at $5 for 3,000 shots.
Create a free ScreenshotNeo account to start with 1,000 screenshots a month and no card.
Frequently Asked Questions
Can I use dimensions other than 390 × 844?
Yes. Those dimensions are only an example; choose the viewport width and height in pixels that suit the layout you want to capture.
Can Abstract capture a location-specific mobile screenshot?
Abstract says location-specific screenshots are not currently supported.
Quick Recap
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