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Machine-readable JSON Output Meta Tags Soft 404 Detection SEO Audit Robots.txt Checker Response Time Monitoring SEO Analysis Compliance Check Expiration Policy Evaluation HTTP Security Performance Grading Security Flags Redirect Tracking URL Analysis Indexability Checker Website Security Strict Transport Security Configuration Misconfiguration Detection Canonical URL Verification Response Size Analysis

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Best 缓存控制分析 APIs

Cache Headers Analyzer API

Tools & Utilities

Paste a URL, get a verdict on whether browsers and CDNs can cache it, for how long, and what is misconfigured, as machine-readable JSON. The API parses Cache-Control directives, Expires

Free 7-Day Trial

100% uptime 255ms avg MCP ready

Set Cookie Analyzer API

Security & Cybersecurity

Check the cookies a site sets, per redirect hop and in JSON, for missing Secure/HttpOnly/SameSite flags and RFC violations, from CI or a script. Each cookie is reported with its attributes, Host-/

Free 7-Day Trial

100% uptime 259ms avg MCP ready

CSP Evaluator API

Security & Cybersecurity

Finds the weak points in a website Content Security Policy that undermine script-injection protection. Returns one graded JSON report with a verdict, grade and stable issue codes.

Free 7-Day Trial

100% uptime 690ms avg MCP ready

Link Indexable Analysis API

Data & Analytics

Analyze deep links by tracking redirects, HTTP codes, meta robots policies, robots.txt, detect soft 404s, and report comprehensively on SEO status.

Free 7-Day Trial

100% uptime 561ms avg MCP ready

Link Index Analyzer API

Data & Analytics

Analyzes URLs, detects redirects, status codes, indexability, meta robots, robots.txt, and soft 404s, providing comprehensive information on status and SEO.

Free 7-Day Trial

100% uptime 1,717ms avg MCP ready

Website Performance Analyzer API

Data & Analytics

Analyze any web page URL to obtain detailed performance metrics, information about JavaScript execution, data on layout stability, and caching efficiency.

Free 7-Day Trial

100% uptime 18,705ms avg MCP ready

Security Headers Checker API

Security & Cybersecurity

Check any website's HTTP security headers (Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy

Free 7-Day Trial

100% uptime 219ms avg MCP ready

Retrieve Link Index Information API

Data & Analytics

Get comprehensive details quickly with the Retrieve Link Index Information API to optimize link performance.

Free 7-Day Trial

100% uptime 608ms avg MCP ready

Redirect Chain Check API

Tools & Utilities

Analyze website redirect chains, HTTP status codes, response times, and security-related behavior to identify redirect issues, verify destination URLs, and assess overall redirection performance.

Free 7-Day Trial

100% uptime 421ms avg MCP ready

Indexability Checker API

Tools & Utilities

Check whether a URL can be indexed by Google: meta robots, X-Robots-Tag, canonical and robots.txt signals in one call, returned as a graded JSON report.

Free 7-Day Trial

100% uptime 303ms avg MCP ready

Capture Website Performance API

Data & Analytics

Capture essential performance data for your website to identify areas for improvement in real-time.

Free 7-Day Trial

100% uptime 173ms avg MCP ready

Link Index Data API

Data & Analytics

Monitor complete links, discover internal redirects, status codes, meta robots restrictions, robots.txt, identify soft errors, and offer comprehensive SEO insight.

Free 7-Day Trial

100% uptime 743ms avg MCP ready

Website SEO Audit API

Tools & Utilities

Audit one public page for static SEO signals, 65+ technology fingerprints, and eight security headers with bounded redirects, response size, and private-network blocking.

Free 7-Day Trial