Documentation

SEO Scanner Documentation

SEO Scanner is a free technical SEO platform for full-site crawling, technical checks, content analysis, schema validation, broken-link detection, WHOIS lookups, and export-ready reports. This documentation covers the product, the public API, and the downloadable files you can use in your workflow.

Download Files Open API Reference

What SEO Scanner Covers

SEO Scanner is designed for technical audits, content quality reviews, and operational reporting. It focuses on the parts of SEO that teams need to diagnose quickly: crawlability, on-page markup, duplication, structured data, images, content quality, security, and broken links. Public API access is available for page analysis, WHOIS/RDAP lookup, and sitemap discovery.

8Interface languages

4Export formats: PDF, CSV, JSON, HTML

0Authentication required for public API

30/minRate limit per IP

Scan Modes

Single Page Analysis

Use this mode when you need a focused audit for one URL. It returns core SEO checks, content analysis, schema validation, link metrics, image diagnostics, security headers, and export-ready page data.

Fast page-level diagnosis
Ideal for QA, templates, and landing pages
No deep crawling required

Full Website Crawl

SEO Scanner looks for a sitemap first. If none is found, it falls back to deep crawling to discover indexable URLs. This mode powers site-wide issue summaries, duplicate detection, internal-link insights, and richer exports.

Sitemap discovery + fallback deep crawl
Issue aggregation across all pages
Built for site audits and client deliverables

Technical SEO Coverage

Technical checks are the core of the scanner. Every analyzed page is inspected for title length, meta description quality, heading structure, canonical usage, robots/indexability signals, Open Graph, Twitter Cards, hreflang, structured data, image hygiene, redirects, HTTP status, and security headers.

Title, meta description, H1/H2/H3 consistency
Canonical and robots checks
Open Graph, Twitter, hreflang, and JSON-LD detection
Image alt text, dimensions, and lazy-loading signals
Redirect chains, HTML size, load time, and HTTP status checks
Security headers: HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and more

Structured Data Validation

The schema panel validates JSON-LD blocks, detects rich-result candidates, surfaces missing properties, and shows raw markup for debugging.

Organization WebSite SoftwareApplication FAQPage BreadcrumbList WebApplication

Content Analysis

SEO Scanner also evaluates content quality signals. This is separate from PageSpeed and focuses on what helps content teams and SEO specialists improve clarity, relevance, and crawlable on-page depth.

Readability

Sentence length, readability score, and content difficulty classification.

Density Signals

Top keywords, bigrams, trigrams, and keyword stuffing detection.

Content Depth

Word count, sentence count, paragraph count, and text/HTML ratio.

Links, Security, and Reporting

Links & Broken Links

Inspect internal vs external links, nofollow usage, empty anchors, and broken-link results. The links tab is useful for auditing navigation, orphan-risk patterns, and content hubs.

Exports & Delivery

Generate PDF, CSV, JSON, or HTML output. PDF reports are designed for agency-ready executive summaries plus per-page technical detail. Email sending is also supported directly from the app.

API Reference

The public API is free and keyless. It exposes page analysis, WHOIS/RDAP lookup, and sitemap discovery. PageSpeed is intentionally excluded from the public API.

Base URL

https://seoscanner.it/api/v1

POST /analyze

Analyze a single page and return technical SEO, schema, content, image, link, and security data.

curl -X POST https://seoscanner.it/api/v1/analyze \ -H "Content-Type: application/json" \ -d '{"url":"https://example.com"}'

POST /whois

Fetch RDAP / WHOIS data for a domain or URL.

curl -X POST https://seoscanner.it/api/v1/whois \ -H "Content-Type: application/json" \ -d '{"domain":"example.com"}'

POST /sitemap

Discover and parse the sitemap for a website, including common fallback locations.

curl -X POST https://seoscanner.it/api/v1/sitemap \ -H "Content-Type: application/json" \ -d '{"url":"https://example.com"}'

Downloadable Files

Use these files to integrate the API into internal tools, collections, onboarding docs, or client handoff packages.

OpenAPI JSON

Machine-readable API definition for SDKs, tooling, and import workflows.

/docs-files/openapi.json

Download JSON

OpenAPI YAML

Human-friendly OpenAPI version for editing and documentation generators.

/docs-files/openapi.yaml

Download YAML

Postman Collection

Ready-to-import requests for analyze, whois, and sitemap endpoints.

/docs-files/seoscanner-postman-collection.json

Download Collection

Quickstart Markdown

Shareable technical onboarding doc for teams and clients.

/docs-files/quickstart.md

Download Markdown

FAQ

Does the public API include PageSpeed?

No. The product UI supports PageSpeed analysis, but the public API is intentionally limited to technical SEO analysis, WHOIS/RDAP, and sitemap discovery.

Can I use SEO Scanner for client reporting?

Yes. The PDF export is designed for professional delivery, while CSV, JSON, and HTML exports support internal analysis and automation.

Do I need an API key?

No. Public API endpoints are free and do not require authentication.

What is rate limited?

All public endpoints are limited to 30 requests per minute per IP address. Standard rate-limit headers are returned with each response.