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World desk4 min

ScreenshotMachine CLI Times Out on Slow Websites: How to Fix It

Separate Screenshot Machine’s capture delay from your HTTP client’s timeout, then troubleshoot the request and response errors in the right layer.
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First determine whether the screenshot arrives too early or the program making the request gives up waiting. Screenshot Machine’s documented delay parameter controls how long its capture engine waits before taking the screenshot; it is not a client request-timeout setting. If curl, a script, CI runner, or wrapper aborts while waiting for the API, adjust that caller’s timeout instead. The vendor documentation describes an HTTP GET API and a Bash example, but does not establish a standalone ScreenshotMachine CLI or a vendor CLI timeout flag. Screenshot Machine API documentation.

Identify what is timing out

Record the exact command and error message, then identify which layer produced it. Screenshot Machine documents requests to https://api.screenshotmachine.com/ using HTTP GET query parameters, including a Bash example that calls the API with curl. That is different from a documented, vendor-provided CLI with its own timeout option. If you use a separately installed wrapper called “ScreenshotMachine CLI,” its timeout flags depend on that wrapper’s implementation.

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  • The screenshot returns, but content is missing: the capture may be happening before the page finishes rendering. Increase the API’s delay and inspect the result.
  • The process exits with a timeout or deadline error: the HTTP client, script, CI runner, or wrapper may be ending the request before it receives a response. Configure that caller’s request timeout using its own documented option.
  • The API returns an error: inspect the response before treating it as a slow-page problem.

Screenshot Machine’s documentation does not specify a universal request-timeout flag, a vendor-side maximum processing duration, or a guarantee that waiting longer will make a failed capture succeed.

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Increase capture delay when the shot is too early

Set the API’s delay parameter to make the capture engine wait before creating the screenshot. The documented default is 200 milliseconds. Allowed values are 0, 200, 400, 600, 800, 1000, and each whole second from 2 through 10 seconds. The documentation recommends a longer delay for long pages with images or animations. See the API parameter reference.

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  1. Start from the current request and add or adjust delay using one of the documented values.
  2. Capture the same page again and check whether the missing content appears.
  3. Increase the delay in modest steps if needed, staying at or below 10000 milliseconds.

A longer delay is a fixed wait, not a guarantee that every asynchronous task, animation, or late-loading element will finish.

Raise the caller’s request timeout only when it is aborting

If the timeout message comes from curl, an HTTP library, a CI runner, or a wrapper, adjust the request deadline at that layer. The correct setting and syntax vary by client, so check that tool’s help or documentation rather than assuming a Screenshot Machine parameter controls it. A client timeout gives the caller more time to wait; it does not change the page’s rendering behavior or guarantee success.

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Screenshot Machine’s documented interface is an HTTP GET request with query parameters. A valid request needs both key and url; percent-encode the URL, especially when it contains reserved characters such as & or ?. The vendor’s API example and parameter reference.

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Read the API error before changing timing settings

For an error response, check the X-Screenshotmachine-Response header. The documented error values include:

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  • invalid_hash or invalid_key: check the account key and request authentication.
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  • invalid_selector or invalid_crop: review the selector or crop values in the request.
  • system_error: the response identifies a system error; it does not by itself show that the target site is simply slow.

These documented responses point to request, account, or service issues rather than proving that increasing delay will help. Screenshot Machine’s error reference.

Keep capture dimensions within the documented limits

Dimensions are capture settings, not timeout controls. Screenshot Machine documents widths from 100 to 1920 pixels and heights from 100 to 9999 pixels, or full for full-page height. Its documentation suggests a longer delay for full-length pages because they can contain more images or animations; use a delay value within the documented range and assess the resulting capture.

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Or skip the browser setup

For a one-call screenshot API alternative, ScreenshotNeo returns a screenshot from a GET request. Its cleanup can accept the cookie or consent banner as a visitor and remove more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each step can be turned off. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and the response identifies the page verdict and billing status in headers. Its MCP server gives AI agents tools to take screenshots, inspect page information, and capture PDFs.

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Example using cURL (replace the target URL as needed):

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

See the ScreenshotNeo API documentation for request options. The Free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots. Sign up for free and get 1,000 screenshots a month with no card.

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Frequently Asked Questions

Does Screenshot Machine document a CLI timeout flag?

No. Its cited documentation demonstrates a shell script calling the hosted HTTP GET API and lists the capture-delay parameter, but does not document a vendor CLI timeout setting.

Will increasing delay stop curl from timing out?

Not necessarily. delay controls the wait before capture; a caller’s request deadline is configured separately in that client or wrapper.

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Quick Recap

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