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Worker Tiers

Every job runs on one worker tier. Pick the cheapest tier that can fetch the target reliably, then move up only when the page requires rendering or stronger anti-blocking controls.

Comparison

Tier Engine Best for Anti-blocking controls
Light Optimized HTTP APIs, static pages, server-rendered catalogs, high throughput. TLS/HTTP impersonation, custom headers, retries, optional proxy config.
Standard Browser JavaScript apps, rendered HTML, screenshots, DOM interactions. Browser context controls, viewport/locale/timezone, actions, resource blocking.
Stealth Hardened browser Targets with bot challenges, aggressive fingerprinting, or unstable standard-browser success rates. Hardened browser profile, OS/fingerprint controls, managed proxy pool, session stickiness, helper extensions.

Light

Use light when the data is available from a URL without browser execution. It is the fastest and highest-throughput tier.

  • Send GET, POST, PUT, PATCH, DELETE, or HEAD.
  • Set headers, body, redirect behavior, user agent, and retry policy.
  • Use extraction hooks on HTML, text, or JSON responses.
  • Start here for APIs, static HTML, product pages, listing pages, and feed endpoints.

Standard

Use standard when the content is built by JavaScript or requires browser interaction.

  • Render the page in a browser before capturing artifacts.
  • Configure wait_until, navigation_timeout_ms, viewport, locale, timezone, and headers.
  • Run ordered actions: click, fill, scroll, and wait.
  • Capture screenshots, HAR traces, console logs, rendered HTML, and extraction JSON.

Stealth

Use stealth when standard is blocked or produces inconsistent results. This tier is built for protected targets and aggressive browser fingerprinting checks.

  • Select OS profiles with os_name: windows, macos, or linux.
  • Use managed proxy rotation and session stickiness for the job.
  • Reduce detection surface by blocking images, fonts, media, or other noisy resources.
  • Enable helper extensions such as ublock and isdcac.
  • Tune waits and actions for interstitials, overlays, lazy loading, and multi-step flows.

Stealth is more expensive than light or standard, so use it where the higher success rate justifies the cost.

Outputs

Every job, regardless of tier, produces structured Artifacts:

  • HTML: final HTML or response body.
  • Screenshot: PNG capture for browser tiers.
  • Extraction JSON: structured data from extraction hooks.
  • Metadata: status, timings, headers, fingerprint data, and failure context.
  • HAR/console logs: optional browser diagnostics.

Artifacts are retained according to your organization's retention policy.

See also