SEO Auditing API
Extract on-page SEO signals across large site inventories — title tags, meta descriptions, heading structures, canonical URLs, hreflang, and structured data — for programmatic auditing workflows.
How It Works
Crawl the site inventory
Discover all URLs within a domain and generate a page list for systematic auditing.
Extract SEO signals
Pull structured SEO data from each page: title, description, H1-H3, canonical, robots meta, hreflang, and JSON-LD.
Identify issues programmatically
Analyze extracted data to flag missing tags, duplicate titles, broken canonicals, and missing structured data.
Quick Start
curl -X POST https://alterlab.io/api/v1/scrape \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"url": "https://example.com/product-page",
"extract": {
"title": "string",
"meta_description": "string",
"h1": "string",
"canonical": "string",
"structured_data": "object"
}
}'Need an API key? Sign up free — no credit card required.
Related Data Extraction Guides
Related Use Cases
Frequently Asked Questions
Responsible Use
AlterLab is designed for extracting publicly available data. Always review the terms of service for any website you access, respect robots.txt directives, and ensure your use case complies with applicable laws in your jurisdiction.
Your first scrape.
Sixty seconds.
$1 free balance. No credit card. No SDK.
Just a POST request.
No credit card required · Up to 5,000 free scrapes · Balance never expire