CORS Headers & Preflight Checker | URL Audit

Check CORS response headers (Access-Control-Allow-Origin, -Credentials, -Methods, -Headers, -Expose-Headers, -Max-Age, Vary: Origin) for one or more URLs. Optionally performs a preflight OPTIONS check. Useful for debugging browser/API integrations and spotting risky CORS misconfigurations.

Audit public endpoints for CORS origin policy, credential behavior, OPTIONS preflight, origin reflection, and Vary: Origin cache safety.

Keyword Cannibalization | SEO Dataset Analyzer

quanmatrix/keyword-cannibalization-seo-collision-intelligence

Analyze supplied search and page ranking datasets to identify keyword overlap and SEO cannibalization risks.

Audit websites and APIs in bulk for OWASP HTTP security headers (HSTS, CSP, X-Frame-Options, nosniff, Referrer-Policy, Permissions-Policy), CORS misconfigurations, server fingerprint leakage, and A+ to F security grades.

Port Congestion Data | Container Dwell Changes

quanmatrix/global-port-congestion-container-dwell-intelligence

Analyze supplied port and supply-chain datasets for changes in container dwell times, congestion and operating pressure.

Extract available public records covering public Telegram channel profiles and visible subscriber text. Use supported IDs, URLs or search terms to receive structured results with source links. Source access and field availability can change.

Support Policy Changes | FAQ Dataset Diff

quanmatrix/competitor-support-policy-drift-intelligence

Compare supplied website-content snapshots to identify changes in competitor FAQs, returns policies, support terms and service commitments.

CORS Checker & Preflight Tester

gifted_wagon/cors-preflight-evidence-auditor

Test simple and OPTIONS preflight CORS behavior with normalized policy evidence, risky-pattern findings, and truthful per-endpoint failures.

Check public URLs for MIME types, charset declarations and related HTTP response headers, highlighting observed metadata and security problems.

Bulk-check URLs for HTTP security headers. Grades sites A+ through F based on HSTS, CSP, XFO, XCTO, Referrer-Policy, and Permissions-Policy presence.