SEO Analyzer API
Full SEO audit of any URL in seconds
Perform comprehensive SEO analysis on any webpage. Check meta tags, headings, content quality, page speed signals, mobile readiness, structured data, internal links, and keyword density. Get actionable recommendations to improve search rankings.
How it works
Three steps. No complex setup.
Send your request
Make a POST with the data you want to analyze. Include your API key in the Authorization header.
We process server-side
Our engine validates, analyzes and enriches the data in under 200ms. No external APIs, no network latency.
Receive the result
Typed JSON with all documented fields. Clear errors if something fails. Production ready.
Who is it for?
Response example
Real input and output. What you send and what you get back.
// Input
{
"url": "https://example.com",
"checkMobile": true
}// Output
{
"success": true,
"url": "https://example.com",
"overallScore": 78,
"title": "Example Domain",
"titleLength": 14,
"metaDescription": "This domain is for use in illustrative examples.",
"metaDescriptionLength": 48,
"h1Count": 1,
"h2Count": 0,
"wordCount": 250,
"loadTimeMs": 320,
"mobileReady": true,
"hasStructuredData": false,
"issues": [
"Missing H2 headings",
"No structured data markup"
],
"recommendations": [
"Add FAQ schema",
"Increase content length to 800+ words"
],
"keywordDensity": {}
}Try it now
// live demo — no account needed to try
Playground
Integrate into your project
Copy and paste. Replace YOUR_API_KEY with your real key.
curl -X POST https://jsnhengine.com/api/v1/seo-analyzer \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"url": "https://example.com", "checkMobile": true}'Why choose JSNH Engine Lab
Low latency
Responses in under 200ms
Secure authentication
API keys with per-plan rate limiting
Usage tracking
Every request logged with metrics
Production ready
Input validation and typed errors
Frequently asked questions
Everything you need to know before integrating.
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Community reviews
What developers using this module say
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// production ready
Start using SEO Analyzer API
Sign up free and get 1,000 tokens to start. No credit card. No complex setup.