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How to Capture a Website Screenshot with a CSS Selector in CaptureKit

Send a CaptureKit GET request with a page URL, CSS selector, and API key to capture one webpage element. Learn when to wait for late-loading content and how to choose formats and viewport options.
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To screenshot one element with CaptureKit, send a GET request to /v1/capture, put the page URL in url, pass the element’s CSS selector in selector, and authenticate with your API key in the x-api-key header. Use wait_for_selector separately if the element may appear late: it waits for the element but does not choose what gets captured.

Capture one element with CaptureKit

CaptureKit’s capture endpoint reference describes selector as capturing a specific element instead of the full viewport. The request is a hosted API call, so you do not need to launch or manage a browser locally.

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  1. Get an API key through CaptureKit’s dashboard and keep it secret. Its documentation landing page covers API keys, credits, logs, and billing controls.

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  2. Choose the URL of the page to capture and the CSS selector for the element you want.

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  3. Send a GET request to https://api.capturekit.dev/v1/capture with url and selector query parameters, and provide the key in the x-api-key header.

  4. Save the response as an image or PDF in the format you requested.

cURL example

Replace the example page URL, selector, and API key with your own values. Quote the URL and selector so shell characters such as & or spaces are not misread.

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curl -G "https://api.capturekit.dev/v1/capture" 
  -H "x-api-key: YOUR_API_KEY" 
  --data-urlencode "url=https://example.com" 
  --data-urlencode "selector=.product-card" 
  --data-urlencode "format=png" 
  -o element.png

The endpoint documentation lists PNG as the default format, so the format parameter is optional in this example. It also lists JPEG, JPG, WebP, and PDF as available formats.

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Choose the right selector and wait behavior

selector chooses the capture target

Use selector for the element you want in the screenshot. For example, .product-card targets elements with that class in ordinary CSS syntax; choose a selector that matches the relevant element on your own page. The endpoint reference describes the parameter as a string but does not specify how multiple matches are handled or what happens when there is no match. Test the selector against the target page rather than assuming a particular match rule.

wait_for_selector waits for an element to appear

Use wait_for_selector when the page renders the target after initial navigation. It serves a different purpose from selector: one waits for an element to appear, while the other chooses the element to capture. If the same element is both the target and the late-loading signal, pass its selector to both parameters.

curl -G "https://api.capturekit.dev/v1/capture" 
  -H "x-api-key: YOUR_API_KEY" 
  --data-urlencode "url=https://example.com" 
  --data-urlencode "selector=.product-card" 
  --data-urlencode "wait_for_selector=.product-card" 
  --data-urlencode "wait_until=domcontentloaded" 
  -o element.png

CaptureKit documents networkidle2, load, domcontentloaded, and networkidle0 as wait_until choices. Choose a readiness condition appropriate to the page; if a brief additional pause is needed, the documented delay range is 0–10 seconds. A delay is not a substitute for waiting for a known element when that element’s appearance matters.

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Set output and page context when needed

Start with the endpoint’s defaults unless the capture requires a particular format or rendering context. CaptureKit documents these additional controls:

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  • Output: PNG is the default. JPEG, JPG, WebP, and PDF are also listed; image quality is documented for JPEG and WebP.

  • Viewport and device: set viewport width and height, use device emulation, or adjust scale factor when the element’s layout depends on screen size or pixel density.

  • Page extent: use full-page mode when you need the entire page, and lazy-load scrolling when content appears as the page scrolls. Element targeting and full-page capture address different needs; choose the option that matches the output you want.

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  • Page resources: resource blocking, URL blocking, and ad removal can help control what the browser loads.

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  • Storage and reuse: caching and S3 output are available options in the endpoint reference.

Use the exact parameter names and allowed values from the CaptureKit endpoint documentation for these options. The reference states that a call uses one credit; it does not establish current plan prices.

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Troubleshoot a missing or unexpected element

Or skip the browser setup

ScreenshotNeo provides a screenshot API and MCP server. One GET request can return an image or PDF; the API also supports CSS-selector element captures. Cookie banners, newsletter popups, and chat widgets are removed before capture by default, and each step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed; responses indicate the page verdict and billing status in headers. AI agents can use its MCP server tools, including take_screenshot, get_page_info, and capture_pdf. The free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000 shots.

curl -G "https://api.screenshotneo.com/v1/shot" 
  -d access_key=YOUR_API_KEY 
  --data-urlencode url=https://example.com 
  --data-urlencode selector=.product-card 
  -o shot.webp

See the ScreenshotNeo API documentation for request options, or visit ScreenshotNeo. Sign up free for 1,000 screenshots a month with no card.

Quick Recap

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