If a ScreenshotOne webhook seems to be missing, first identify where the event stopped: request configuration, screenshot execution, callback delivery, endpoint acceptance, or your own downstream processing. Check the original API response and your receiver’s inbound logs before changing retry behavior; ScreenshotOne’s reviewed documentation does not specify whether failed webhook POSTs are retried.
Trace the failure to the stage where it occurs
A webhook is a POST from ScreenshotOne to the URL you supply. A missing event does not by itself show whether ScreenshotOne failed to render the page, whether the callback reached your server, or whether your application discarded an accepted request.
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- Verify the submitted request and its callback options.
- Check whether ScreenshotOne produced a success or error result.
- Search your proxy, platform, and application logs for an inbound POST.
- If the POST arrived, check its HTTP response, signature validation, parsing, and downstream processing.
Check the request configuration
Confirm the callback URL and async setting
Inspect the exact request sent to ScreenshotOne. Confirm webhook_url is present, correctly encoded, and points to the intended publicly reachable endpoint. The endpoint must accept POST requests. Webhooks can be used with synchronous or asynchronous requests, though they are commonly paired with asynchronous requests. The async option is false by default, so set async=true if your workflow expects asynchronous completion.
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Match your parser to the response type
If your receiver expects JSON, set response_type=json. The documented example returns a screenshot_url; with storage configured, it can return a storage location when storage_return_location=true. Without JSON, the body may contain binary screenshot data. A handler that always parses the body as JSON can therefore reject a valid callback payload.
Determine whether screenshot execution succeeded
Expose failed executions to the callback
Error details are not sent to the webhook URL by default. Set webhook_errors=true when you need execution errors reported there. When JSON is used, inspect the body; error details can also be available in response headers. Look for fields such as error_code, error_message, and documentation_url when present. See the Async and Webhooks documentation and options reference.
Use the API error rather than retrying blindly
Check the original API response. ScreenshotOne error responses include a human-readable message, an error code, and an HTTP status. Its error reference and error-handling guide distinguish request-side errors from API-side errors and provide case-specific guidance. The guide generally treats 500–599 errors as potentially retryable, but calls out exceptions, including target network_error and 4xx host_returned_error. Follow the recommendation for the specific error rather than retrying every failure.
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Separate render timeouts from callback failures
A rendering timeout is an upstream execution problem, not proof that callback delivery failed. ScreenshotOne’s timeout guidance recommends considering timeout, navigation_timeout, excessive delay, and wait_until; for longer operations, asynchronous requests and webhooks may be appropriate.
Inspect the receiving endpoint
Search reverse-proxy, hosting-platform, and application logs around the expected callback time. Record whether the POST arrived and what HTTP status your endpoint returned.
- No inbound request is logged: recheck the URL, DNS, TLS certificate, firewall, public reachability, route, and whether the ScreenshotOne request produced a result.
- The request arrived but received a non-success status: inspect route handling, authentication middleware, payload-size limits, rate limits, and serverless or runtime timeouts.
- The endpoint returned success but the event is absent from your system: check JSON parsing, queue publication, database transaction rollback, validation logic, and any downstream worker.
These are receiver-side checks for a POST integration; they are not claims about ScreenshotOne’s internal delivery mechanism. The documentation establishes the POST callback pattern but does not guarantee retries.
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Verify the webhook signature using the raw body
ScreenshotOne sends an X-ScreenshotOne-Signature header. Validate the webhook request body with HMAC SHA-256 and the webhook secret shown on the access page. The webhook secret is different from the API key. Header names are case-insensitive in HTTP handling.
Compute the signature against the exact raw request body, before parsing and reserializing JSON. Check that your application has the correct current webhook secret and is not mistakenly using the API key. A signature mismatch can cause your receiver to reject a POST that otherwise reached it.
ScreenshotOne’s Async and Webhooks documentation says: “You also receive the X-ScreenshotOne-Signature (x-screenshotone-signature) header that you should use to validate the webhook request body and make sure that ScreenshotOne sent the request.”
Correlate events and prepare a useful support request
ScreenshotOne documents these identifiers for diagnosis:
x-screenshotone-trace-id: a unique request trace ID to provide to support.x-screenshotone-reference: a screenshot or video ID that may appear in history or be used with support.x-screenshotone-external-identifier: a value you supply to track success and error events.
Use trace and reference IDs for debugging and support, not as application logic. The debugging documentation describes these headers. When contacting [email protected], include available IDs, the UTC timestamp, request options with secrets removed, API status and error code, the receiver’s status, and relevant sanitized logs. Do not send your API key or webhook secret.
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Or skip the browser setup
If your goal is simply to capture a website rather than integrate ScreenshotOne webhooks, ScreenshotNeo offers a one-request screenshot API and an MCP server for AI agents. Its clean-capture steps accept cookie or consent banners like a visitor and remove 60+ known consent platforms, newsletter popups, and chat widgets; each step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers identify page verdict and billing status. ScreenshotNeo’s MCP server provides take_screenshot, get_page_info, and capture_pdf tools.
Install Python’s requests package, set YOUR_API_KEY, and run:
import requests
r = requests.get(
"https://api.screenshotneo.com/v1/shot",
params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"},
timeout=90,
)
open("shot.webp", "wb").write(r.content)See the ScreenshotNeo API documentation for setup and options. ScreenshotNeo includes 1,000 screenshots per month free with no card; paid plans start at $5 for 3,000. Sign up for the free plan.
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