Send a POST request to ScreenshotOne’s https://api.screenshotone.com/bulk endpoint with each page in a requests array. A bulk request can contain up to 20 items. By default, the response contains screenshot URLs that render lazily when downloaded; add "execute": true when you need ScreenshotOne to render the items before it responds and return execution status for each one.
Send a bulk screenshot request
Put shared screenshot settings in options, then list the pages to capture in requests. The following is an illustrative request shape; replace the access-key placeholder with a secret kept outside published code.
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curl -X POST "https://api.screenshotone.com/bulk"
-H "Content-Type: application/json"
-d '{
"access_key": "YOUR_ACCESS_KEY",
"execute": true,
"options": {
"viewport_width": 1280,
"viewport_height": 1024
},
"requests": [
{"url": "https://example.com"},
{"url": "https://example.org", "options": {"block_ads": true}}
]
}'The bulk endpoint accepts an access key in the JSON body, query string, or X-Access-Key header. Use an environment variable or secrets manager for the key; do not commit it to source control or expose it in a public URL. See ScreenshotOne’s bulk screenshots documentation for the current request schema.
Shared settings and per-page overrides
Settings in the top-level options object act as defaults for the items. An individual request can provide its own options to override those defaults, such as enabling ad blocking for one page but not the rest. Each request item can use a URL, HTML, or Markdown source.
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Stay within the batch limit
ScreenshotOne documents a maximum of 20 requests in one bulk request. Divide larger URL collections into batches of 20 or fewer; do not assume that a larger array will be accepted.
Choose when screenshots are rendered
| Pattern | When rendering happens | Use it when |
|---|---|---|
| Default (lazy) | The response returns screenshot URLs; screenshots are generated when those URLs are downloaded. | You can fetch each result URL afterward and do not need per-item completion status in the initial response. |
"execute": true |
The endpoint executes the screenshots before returning and includes execution status for each request. Failed items include an error body. | Your next step depends on knowing which captures completed or failed. |
Execution can take time across a batch, so allow an appropriate client timeout and handle each item’s status rather than treating a successful HTTP response as proof that every screenshot succeeded.
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Use optimize only for suitable batches
"optimize": true requires "execute": true. ScreenshotOne says it may speed up work that uses the same source with different options, but it is not guaranteed: changing the viewport can trigger reloads, and settings such as ad blocking may also require page reloads. Test it with your actual pages and option combinations before relying on a speed improvement.
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Control larger workloads with the usage endpoint
Bulk requests consume the same one-minute request-start bucket as ordinary screenshot calls. The usage endpoint exposes concurrency.remaining and concurrency.reset; these indicate request-start bucket availability and reset timing, not the number of render processes currently active. Consult those values before draining queued batches, using the usage endpoint documentation.
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Queue and retry strategy
- For a small workload handled by one process, place batches in a queue and retry failures with backoff.
- For multiple workers, or retries that must survive a process restart, use a durable queue such as Redis/BullMQ or SQS.
- Drain batches in line with the usage endpoint’s remaining and reset values; keep individual item failures visible so they can be retried without losing successful results.
ScreenshotOne’s guidance recommends queueing and backoff for these workloads; it does not provide a benchmark for expected throughput.
Use async delivery when the caller should not wait
If your application should not hold a request open while captures finish, ScreenshotOne also documents asynchronous rendering with a webhook. Its described workflow can upload screenshots to S3 and post execution results to a webhook URL. This is a different delivery pattern from waiting for an executed bulk response; see the async screenshots documentation.
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Troubleshooting
- Bulk call is rejected: confirm that the JSON is valid, the access key is present, and the
requestsarray contains no more than 20 items. - Response arrives but no image is ready: without
execute: true, returned URLs are lazy. Download those URLs to trigger rendering, or use execution when you need results before the response completes. - Some items fail while others succeed: inspect per-request execution status and error bodies when using
execute: true; retry failed items with backoff rather than repeating successful captures unnecessarily. optimizeis rejected or has no visible benefit: use it only withexecute: true, and test whether your source and options permit reuse. Viewport changes and ad-blocking can cause reloads.- Work is throttled: check
concurrency.remainingandconcurrency.resetat the usage endpoint. They describe the one-minute request-start bucket, not active rendering capacity. - Credential exposure risk: remove keys from source code, logs, and public URLs; rotate an exposed key and load the replacement from a secret store or environment variable.
Or skip the browser setup
ScreenshotNeo is a screenshot API with a single GET request per URL. For this multi-URL workflow, submit the requests separately or use your own batching. Its captures accept cookie and consent banners and remove 60+ known consent platforms, newsletter popups, and chat widgets before capture; each cleanup step can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers identify the page verdict and billing status. An MCP server provides take_screenshot, get_page_info, and capture_pdf for AI agents.
Here is a one-call example; see the ScreenshotNeo API documentation for options and setup:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpFree includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up for ScreenshotNeo’s free plan.
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Frequently Asked Questions
Can a ScreenshotOne bulk request mix URLs and HTML or Markdown?
Yes. Each request item may provide a URL, HTML, or Markdown source.
Does concurrency.remaining tell me how many screenshots are rendering right now?
No. It reports remaining capacity in the one-minute request-start bucket, not active render processes.
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