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Cache-Control Header Checker (HTTP caching audit)

Audit HTTP caching response headers for one or more URLs.

This actor fetches headers and evaluates:

• Cache-Control
• Expires
• ETag
• Last-Modified
• Vary
• Age

Optionally it can perform a conditional revalidation request using If-None-Match / If-Modified-Since (when validators are present) to check whether the server returns 304 Not Modified.

Input

• Start URLs: URLs to check
• Use HEAD request first: Try HEAD and fall back to GET when needed
• Validate revalidation: Perform a second conditional request (may double requests)
• Follow redirects / max redirects
• Timeout / max concurrency
• Proxy configuration (optional)

Output

Dataset (per URL)

Each dataset item contains:

• start URL + final URL + HTTP status
• caching policy classification + score (0-100)
• warnings/errors with codes
• parsed caching-related headers
• optional revalidation result

Key-value store

• SUMMARY: aggregate counts + average score
• REPORT: SUMMARY plus top issue codes

Notes

• “Good” caching depends on content type (HTML vs static assets). This actor surfaces signals; interpret results in context.
• Some origins/CDNs vary behavior by request headers (e.g., Accept-Encoding), so results can differ from a browser.

Quick start

Store page: https://apify.com/scrappy_garden/cache-control-checker

Paste this into Input and click Run:

{
"startUrls":[
{
"url":"https://example.com/"
}
],
"proxyConfiguration":{
"useApifyProxy":false
}
}

Outputs (what you get)

• Dataset: Dataset items typically include fields like: startUrl, finalUrl, statusCode, redirected, cacheScore, cachePolicy, warningCount, errorCount, issues, checkedAt.
• Key-value store: REPORT, SUMMARY

Tips (trust + predictable results)

• Start with 1–3 URLs to validate behavior, then scale up.
• If a target blocks requests, enable Proxy and/or slow down concurrency in Input.
• Use the SUMMARY / REPORT keys (when present) for automation pipelines and monitoring.

Related actors

• broken-link-checker (https://apify.com/scrappy_garden/broken-link-checker)
• canonical-url-checker (https://apify.com/scrappy_garden/canonical-url-checker)
• meta-tag-analyzer (https://apify.com/scrappy_garden/meta-tag-analyzer)
• security-headers-checker (https://apify.com/scrappy_garden/security-headers-checker)

Search keywords

cache control checker, cache-control header checker - audit http caching configuration, website audit, seo