The Expression Evaluation API is a versatile natural language calculator that can evaluate mathematical expressions and return the results in plain text. Simply input the expression to be evaluated, and the API will scan and compute the calculation, making it an easy-to-use tool for developers who want to incorporate a calculator function into their applications.

Analyze how easy English or Spanish text is to read, then return readability scores, reading time, speaking time and average grade level.

"Content Word Counter API: Efficiently quantifies textual content, offering accurate word counts with configurable options. Streamlining language analysis for various applications."

Extract the search optimization data of any page: title and description with lengths, canonical address, social sharing cards, structured data types, headings map, link and image audit, word count and redirect chain.

Audit one public page for static SEO signals, 65+ technology fingerprints, and eight security headers with bounded redirects, response size, and private-network blocking.

Get production-grade domain authority and pagerank-style metrics for domains and hosts.

Score the readability of any English text. Returns Flesch-Kincaid, Gunning Fog, SMOG, ARI scores, sentence-level breakdown, improvement suggestions, and target grade pass/fail in one call.

Fetch detailed web rank analysis with ease, optimizing your site's performance and achieving higher search engine placements.

Investigates any webpage and generate a comprehensive SEO report.

Submit a URL and instantly learn if it’s indexable by Google, with detailed diagnostics for robots rules, meta tags, redirects, soft-404s, and more.

Analyze any web page URL to obtain detailed performance metrics, information about JavaScript execution, data on layout stability, and caching efficiency.

The Text Keyword Evaluator API evaluates keyword occurrence within text, delivering valuable insights to refine content and improve search engine visibility.

The People Counting API is an image processing tool that accurately detects and counts the number of people in an image. Bypassing an image to the API, users can quickly and easily obtain an accurate count of the number of people present in the image.

Scrape content effectively and understand authority levels with our Website Authority Scraper API.

Audit web pages or whole websites for WCAG 2.2, EN 301 549 (European Accessibility Act) and Section 508 in a real browser. JSON, CSV or HTML report.

Convert public static and JavaScript-rendered web pages into clean Markdown for LLM ingestion, RAG pipelines, search indexing, and content processing.

Streamline complex information using the Technical Writing Technical Writing Readability API for clear communication.

Increase user engagement by enhancing readability with the User Engagement User Engagement Readability API.

Optimize your SEO strategy by improving readability with the SEO Optimization SEO Optimization Readability API.

Enhance your content's clarity with the Content Marketing Content Marketing Readability API for better engagement.

Make your content accessible to all users with the Accessibility Compliance Accessibility Compliance Readability API.

Leverage the Domain Authority Evaluation API to assess competitors and boost your online presence effectively.

Effortlessly retrieve links, metadata, and media from any webpage. This API offers reliable and scalable web scraping for various data extraction needs.

Fetch comprehensive performance metrics for your website to improve speed and user satisfaction.

Uncover insights into your website's content performance and enhance engagement with our robust API.