On-Page SEO Analyzer API

API ID 14827

Analyze any webpage for on-page SEO performance. Get SEO scores, meta tags, heading counts, image alt attributes, and internal and external link statistics.

API Documentation

Endpoints

Request
The "url" endpoint is designed to handle the submission and retrieval of URL-related data, facilitating actions such as shortening long URLs, retrieving associated metadata, or validating URL formats. When users submit a URL, the endpoint processes the input to check its accessibility and extracts essential metadata, including the title, description, and any associated images, returning this information in a structured format. This endpoint can be particularly useful for developers creating applications for sharing links efficiently, implementing social media integration where URL previews are needed, or for analytics purposes to track user interactions with shared content.
Endpoint ID: 38421
POST https://zylalabs.com/api/14827/on-page+seo+analyzer+api/38421/webpage
INPUT PARAMETERS

webpage — Endpoint Features

Object Description
url Required Provide any URL.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

url
API EXAMPLE RESPONSE
JSON
{
    "status": "ok",
    "time": "November 10, 2026, 8:16 pm",
    "url": "https://www.alreadycoded.com/seo-tools/seo-content-analysis-tool.html",
    "seo_score_out_of_100": "69",
    "meta_title": "SEO Content Analysis Tool - Already Coded",
    "meta_title_length": "41",
    "meta_description": "When you enter the domain URL and keywords in this tool, it goes to crawl the domain and analyze it from different perspectives and factors, such as keyword occurrences and keyword density in meta title, meta description, meta keywords and in headings. Further the report shows On-Page SEO errors and recommendations, etc. Script Details:- Price:",
    "meta_description_length": "346",
    "meta_keywords": "",
    "meta_keywords_length": "0",
    "tag_h1_count": "0",
    "tag_h2_count": "1",
    "tag_h3_count": "2",
    "tag_h4_count": "0",
    "tag_h5_count": "0",
    "tag_h6_count": "1",
    "total_images": "5",
    "images_missing_alt": "0",
    "total_links_on_page": "70",
    "internal_links": "62",
    "external_links": "8"
}
Webpage — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14827/on-page+seo+analyzer+api/38421/webpage?url=https://www.alreadycoded.com/seo-tools/seo-content-analysis-tool.html' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the On-Page SEO Analyzer API simply include your bearer token in the Authorization header.

Headers
Header Description
Authorization Required Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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(Save 2 months with annual billing 🎉)

Starts at
$10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Overview

Analyze any webpage for on-page SEO performance. Get SEO scores, meta tags, heading counts, image alt attributes, and internal and external link statistics.

On-Page SEO Analyzer API FAQs

The API returns comprehensive on-page SEO data, including SEO scores, meta tags, heading counts, image alt attributes, and statistics on internal and external links for the submitted webpage.

Key fields in the response include "seo_score_out_of_100," "meta_title," "meta_description," "tag_h1_count," "total_images," and "internal_links_count," providing insights into various SEO aspects of the analyzed webpage.

The response data is structured in a JSON format, with key-value pairs representing different SEO metrics. This allows for easy parsing and integration into applications for further analysis or reporting.

The primary parameter for the endpoint is "url," which specifies the webpage to analyze. Users can submit any valid URL to retrieve its SEO performance data.

Typical use cases include optimizing website content for better SEO performance, conducting competitive analysis, and generating reports for digital marketing strategies based on on-page SEO metrics.

Data accuracy is maintained through automated checks for URL accessibility and by extracting metadata directly from the webpage, ensuring that the information reflects the current state of the analyzed site.

Users can utilize the returned data to identify SEO strengths and weaknesses, optimize meta tags, improve heading structures, and enhance image attributes, ultimately boosting the webpage's search engine visibility.

Users can expect consistent data patterns, such as a clear breakdown of heading counts, image statistics, and SEO scores. This allows for straightforward comparisons across multiple pages or sites.

The API evaluates key on-page SEO elements including overall SEO scores, meta tag analysis (title and description), heading tag distribution (H1-H6 counts), image alt attribute presence, and statistics for both internal and external links.

The API provides a comprehensive SEO score that reflects the overall on-page optimization of a given webpage based on the analyzed elements.

Yes, the API can extract and provide details about the meta title and meta description tags present on a webpage.

The API provides counts for each heading level (H1 through H6) found on the webpage, allowing users to assess their structure and hierarchy.

Yes, the API analyzes images on the webpage and reports on the presence or absence of alt attributes, which are crucial for accessibility and SEO.

The API provides statistics on both internal links (links to other pages within the same domain) and external links (links to other domains), including their counts.

The API typically returns results in a structured JSON format, making it easy to parse and integrate into other applications or workflows.

Practical use cases include automated website audits, competitor analysis, content optimization tools, SEO reporting dashboards, and integration into CMS platforms for real-time SEO feedback.

Developers can use the API's data to build tools that identify missing meta descriptions, incorrect heading structures, missing image alt text, and to analyze internal/external linking strategies, all of which are vital for improving content SEO.

The primary benefit is the ability to programmatically assess and understand the on-page SEO health of any webpage, enabling efficient and scalable optimization efforts without manual inspection.

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