SEO Toolkit

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## Overview The SEO Toolkit API provides 44 endpoints for analyzing, scoring, and optimizing web content for search engines. Technical SEO checks without crawling. ## Key Features - **Meta Analysis**: Validate title tags, meta descriptions, OG tags, Twitter cards - **Content Scoring**: Keyword density, heading structure, internal link analysis - **Schema Markup**: Generate and validate JSON-LD…

2 subscribers

8.9/10 popularity

147 ms avg latency

100% success rate

44 endpoints

The in-depth APIMemo review for this API hasn't been published yet — the data below comes straight from the public marketplace listing.

SEO Toolkit endpoints

Method	Endpoint	Description
POST	Analyze Title /meta/title	Analyze a page title for SEO quality. Returns length metrics, pixel width estimate, keyword placement, power words found, and actionable suggestions.
POST	Analyze Description /meta/description	Analyze a meta description for SEO quality. Returns length metrics, CTA presence, keyword inclusion, and truncation preview.
POST	Content Audit /content/audit	Full SEO content audit. Returns word count, paragraph stats, heading analysis, keyword density, readability hints, and prioritized suggestions.
POST	Generate Og Tags /meta/og	Generate Open Graph meta tags from content. Returns HTML meta tags and structured data.
POST	Generate Twitter Tags /meta/twitter	Generate Twitter Card meta tags. Returns HTML meta tags ready to paste into .
POST	Generate Robots Tag /meta/robots	Generate robots meta tag from options. Returns HTML meta tag and directive explanation.
POST	Validate Canonical /meta/canonical	Validate and generate canonical URL tag. Checks for common canonical URL issues.
POST	Generate Hreflang /meta/hreflang	Generate hreflang tags for multi-language/multi-region pages. Includes x-default fallback tag.
POST	Generate All Meta /meta/all	Generate a complete meta tag set: title, description, Open Graph, Twitter Card, and canonical. One-shot endpoint for full meta tag generation.
POST	Word Count Analysis /content/word-count	Detailed word, character, sentence, and paragraph counts.
POST	Keyword Density Analysis /content/keyword-density	Calculate keyword density for a list of keywords. Supports 1-gram, 2-gram, and 3-gram keywords.
POST	Detect Thin Content /content/thin-content	Detect thin content issues. Returns thin content signals, severity rating, and recommendations.
POST	Check Duplicate Content /content/duplicate	Compare two texts for duplicate content using shingling + Jaccard similarity. Returns similarity percentage and verdict.
POST	Optimize Content /content/optimize	Suggest content improvements for a target keyword. Returns a prioritized list of actionable optimization steps.
POST	Analyze Internal Links /content/internal-links	Analyze internal link structure from HTML. Returns all links classified as internal/external with anchor text analysis.
POST	Extract Keywords /keywords/extract	Extract keywords from text using TF scoring. Removes stop words, scores by term frequency, and returns ranked keyword list.
POST	Image Audit /content/image-audit	Audit images in HTML for alt text, file names, and SEO best practices.
POST	Keyword Density /keywords/density	Calculate keyword density for specified keywords. Supports multi-word phrases (n-gram keywords).
POST	Ngram Extraction /keywords/ngrams	Generate n-grams (1 to 4 words) with frequency counts from text.
POST	Lsi Keywords /keywords/lsi	Generate LSI (Latent Semantic Indexing) related terms using co-occurrence analysis. Finds words that frequently appear near the seed keyword in the text.
POST	Generate Questions /keywords/questions	Generate question-based keyword variations from a topic. Returns who/what/where/when/why/how questions plus informational queries.
POST	Long Tail Keywords /keywords/long-tail	Generate long-tail keyword variations from a seed keyword. Returns buyer-intent, informational, and location-based variations.
POST	Keyword Placement /keywords/placement	Analyze keyword placement across content zones. Checks title, meta description, first paragraph, headings, and last paragraph.
POST	Keyword Cannibalization /keywords/cannibalization	Detect keyword cannibalization between two pages. Returns overlap analysis and resolution recommendations.
POST	Analyze Headings /structure/headings	Analyze heading hierarchy from HTML. Returns H1 count, nesting issues, keyword presence, and SEO recommendations.
POST	Analyze Links /structure/links	Analyze all links in HTML. Returns internal/external classification, nofollow analysis, and anchor text distribution.
POST	Analyze Images /structure/images	Analyze images in HTML for alt text, dimensions, lazy loading, and format.
POST	Detect Schema /structure/schema-detect	Detect existing JSON-LD and microdata schema markup in HTML. Returns found schema types and validation insights.
POST	Generate Sitemap Entry /structure/sitemap-entry	Generate an XML sitemap entry from URL and metadata. Returns the XML fragment ready to include in sitemap.xml.
POST	Generate Breadcrumb /structure/breadcrumb	Generate breadcrumb schema and HTML from a URL path. Automatically derives labels from URL slugs.
POST	Readability Score /readability/score	Calculate all 5 readability scores: Flesch-Kincaid Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG Index, Coleman-Liau, and ARI.
POST	Reading Grade /readability/grade	Determine the reading grade level of content using averaged readability formulas. Returns grade level, target audience, and pass/fail for common content standards.
POST	Sentence Analysis /readability/sentences	Analyze sentence complexity — length distribution, long sentences, and complexity rating.
POST	Passive Voice Detection /readability/passive	Detect passive voice sentences. Returns passive sentences, percentage, and suggestions for active voice alternatives.
POST	Transition Word Analysis /readability/transition	Check transition word usage in content. Returns transition words found, coverage percentage, and recommendations.
POST	Readability Suggestions /readability/suggestions	Comprehensive readability improvement suggestions. Combines all readability metrics into a prioritized action plan.
POST	Generate Article Schema /schema/article	Generate Article JSON-LD schema markup. Supports Article, BlogPosting, and NewsArticle types.
POST	Generate Product Schema /schema/product	Generate Product JSON-LD schema markup with pricing, availability, and rating.
POST	Generate Faq Schema /schema/faq	Generate FAQ JSON-LD schema from Q&A pairs. Enables FAQ rich results in Google search (expandable questions in SERPs).
POST	Generate Howto Schema /schema/howto	Generate HowTo JSON-LD schema from a list of steps. Enables HowTo rich results with step-by-step display in Google.
POST	Generate Breadcrumb Schema /schema/breadcrumb	Generate BreadcrumbList JSON-LD schema from a list of breadcrumb items. Enables breadcrumb display in SERPs under the page title.
POST	Generate Organization Schema /schema/organization	Generate Organization JSON-LD schema. Helps Google understand your business and powers Knowledge Panel data.
GET	Root /	API information and available endpoints overview.
GET	Health /health	Health check endpoint.

SEO Toolkit pricing

Plan	Price	Rate limit	Quotas
BASIC	Free	—	Requests: 500,000 / monthly
Pro	$9.99 / month	20 / minute	Requests: 10,000 / monthly
Ultra	$29.99 / month	100 / minute	Requests: 100,000 / monthly

SEO Toolkit

SEO Toolkit endpoints

SEO Toolkit pricing

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