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Best performance audit APIs

SEOScore API

Data & Analytics

SEO audit API with a deterministic 0-100 score, per-check evidence, a ready fix list, and a GEO score for AI-search visibility.

100% uptime 288ms avg MCP ready

Website Accessibility Audit API

Legal & Compliance

Audit web pages or whole websites for WCAG 2.2, EN 301 549 (European Accessibility Act) and Section 508 in a real browser. JSON, CSV or HTML report.

Free 7-Day Trial

100% uptime 2,074ms 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

100% uptime 80ms 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

SEO Score API

Data & Analytics

SEO audit API. Send a URL, get a 0 to 100 score, a grade, category scores, AI readability scores and a prioritized fix list as JSON.

Free 7-Day Trial

100% uptime 4,742ms avg MCP ready

Website Performance Metrics Retriever API

Data & Analytics

Fetch comprehensive performance metrics for your website to improve speed and user satisfaction.

Free 7-Day Trial

100% uptime 20,003ms avg MCP ready

Website Speed Analyzer API

Data & Analytics

Evaluate your website's speed and performance metrics to achieve faster loads and happier users.

Free 7-Day Trial

100% uptime 20,003ms avg MCP ready

Website Data Performance API

Data & Analytics

Retrieve and analyze website performance data effortlessly for optimized user experience.

Free 7-Day Trial

100% uptime 5,878ms avg MCP ready

Accessibility Audit API

Legal & Compliance

Run automated WCAG accessibility audits on any web page. Detects violations, warnings, and best practices for ADA and EAA compliance.

Free 7-Day Trial

100% uptime 192ms avg MCP ready

DomainTrust Audit API

Security & Cybersecurity

Domain mail-authentication audit API: MX, SPF, DMARC and DKIM-selector checks from public DNS, a 0-100 configuration completeness score, plus address screening.

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

Analyze Website Content Performance API

Data & Analytics

Uncover insights into your website's content performance and enhance engagement with our robust API.

Free 7-Day Trial

100% uptime 20,003ms avg MCP ready

Email Auth Auditor API

Security & Cybersecurity

Audit email authentication records for any domain. Checks SPF, DKIM, and DMARC configurations, validates DNS records, and identifies security vulnerabilities in email infrastructure.

Free 7-Day Trial