Pricing

$10.00 / 1,000 url checkeds

Cache Headers Analyzer - Cache-Control, ETag, CDN Verdict

Analyze the caching headers of any URL. Input: urls array. Output: JSON per URL with Cache-Control, ETag, Last-Modified, Expires, Age values plus a cacheability verdict and CDN behavior notes. Priced per URL checked - cheap pay-per-result, no subscription.

Pricing

$10.00 / 1,000 url checkeds

Rating

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Developer

Anthony Snider

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Bookmarked

Total users

Monthly active users

7 days ago

Last modified

Cache Headers Analyzer

See exactly how any URL caches — and why it isn't caching the way you think.

Live on the Apify Store — run it instantly, or call it as an agent tool via Apify MCP.

Point it at any URL and it fetches the page, parses every caching header (Cache-Control, ETag, Last-Modified, Expires, Age, Vary), runs a conditional re-request to verify 304 Not Modified support, fingerprints the CDN, and returns a clear cacheable / not-cacheable verdict with the effective max-age and a list of actionable issues.

What you get

Cacheability verdict — cacheable true/false plus the effective maxAgeSec (honors s-maxage over max-age, and computes from Expires when needed).
Parsed directives — every Cache-Control directive (max-age, s-maxage, no-store, no-cache, private, public, immutable, …) as a structured object.
Validators + 304 test — etag, lastModified, and a real conditional re-request showing whether the origin returns 304 Not Modified.
CDN detection — Cloudflare, CloudFront, Fastly, Akamai, Vercel, Netlify, GitHub Pages and more, with the edge cache status (HIT/MISS).
Issues — plain-English warnings (conflicting directives, Vary: *, long max-age without immutable, missing validators, and more).
Bulk mode — analyze up to 50 URLs in one run.

Input

{
  "url": "https://github.com",
  "urls": ["https://www.cloudflare.com"],
  "maxUrls": 25
}

Provide url, urls, or both. Domains without a scheme get https://.

Output

{
  "url": "https://www.cloudflare.com",
  "finalUrl": "https://www.cloudflare.com/",
  "status": 200,
  "cacheable": true,
  "maxAgeSec": 14400,
  "directives": { "public": true, "max-age": 14400, "s-maxage": 14400 },
  "cacheControl": "public, max-age=14400, s-maxage=14400",
  "etag": "\"a1b2c3\"",
  "lastModified": "Tue, 24 Jun 2025 10:00:00 GMT",
  "expires": null,
  "age": 42,
  "vary": "Accept-Encoding",
  "supports304": true,
  "conditionalStatus": 304,
  "cdn": { "detected": true, "providers": ["Cloudflare"], "cacheStatus": "HIT", "via": null },
  "issues": []
}

Pricing is pay-per-event: one charge per URL analyzed.

Cache-Control Header Checker - Audit HTTP caching configuration

scrappy_garden/cache-control-checker

Audit HTTP caching response headers (Cache-Control, Expires, ETag, Last-Modified, Vary, Age). Optionally tests conditional revalidation using If-None-Match / If-Modified-Since. Useful for web performance tuning and debugging CDN/browser caching behavior.

Bikram Adhikari

HTTP Headers Inspector - Full Headers + Security Analysis

eliai/http-headers-inspector

Inspect full HTTP response headers of any URL. Input: urls array. Output: JSON per URL with every response header, security analysis (HSTS, CSP, X-Frame-Options, etc.), and server fingerprint. Priced per URL checked - predictable pay-per-result, no subscription.

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CORS Checker - Test Access-Control Headers and Preflight

eliai/cors-checker

Test the CORS configuration of any URL or API endpoint. Input: urls array + optional origin/method to test. Output: JSON per URL with actual and preflight (OPTIONS) Access-Control-* headers, allowed origins and methods, and misconfiguration flags. Priced per URL checked.

Anthony Snider

HTTP Protocol & Compression Audit

pattonholdings/http-protocol-audit

Audit how a URL is served: HTTPS, HTTP/2, HTTP/3 (Alt-Svc), Brotli vs gzip compression, cache headers, ETag, HSTS. Returns A-F grade + perf punch-list. Use for web performance audits, CDN verification, hosting QA. Input: url or urls[]. Output: JSON report.

Coleton Patton

Cloudflare API - DNS, Zones, Cache & Security

alizarin_refrigerator-owner/cloudflare-api---dns-zones-cache-security

Manage your Cloudflare infrastructure programmatically. Configure DNS records, manage zones, purge cache, set up page rules, and control security settings through a single interface. Features Zone Management DNS Management Cache Control Page Rules Security & Analytics

The Howlers

HTTP Headers Checker - Security Header Audit

benthepythondev/http-headers-checker

Check HTTP response headers for websites, including status code, server, cache settings, redirects and common security headers.

Ben

Website Uptime Checker - Status, Latency, SSL for Any URL

eliai/website-uptime-checker

Check whether a website is up, on demand. Input: urls array (one or many). Output: JSON per URL with up/down result, HTTP status code, latency in ms, and SSL certificate validity. Priced per URL checked - cheap pay-per-result monitoring without a subscription.

Anthony Snider

HTTP Header Diff Monitor

junipr/http-header-diff-monitor

Compare previous/current HTTP headers and show exact added/removed/changed security/cache/CORS headers.

junipr

Bulk HTTP Status Checker - Status Codes, Redirects, Dead Links

eliai/http-status-checker

Check HTTP status codes for a list of URLs in bulk. Input: urls array. Output: JSON per URL with final status code, full redirect chain, and response time. Find dead pages and broken links fast. Priced per URL checked - cheap, predictable pay-per-result.

Anthony Snider

Response Time Analyzer - DNS, TLS, TTFB Timing for Any URL

eliai/response-time-analyzer

Measure detailed response timing for any URL. Input: urls array. Output: JSON per URL with DNS lookup time, TCP/TLS connect time, TTFB, total transfer time, and payload size. Spot slow pages and backend bottlenecks. Priced per URL checked - cheap pay-per-result.

Anthony Snider