Turn any URL into a rich link card: title, description, Open Graph image (with size), favicon, site name, canonical, author, publish date, RSS feed and oEmbed. SSRF-safe, edge-fast JSON.

Give it a page URL and get back a JSON report on that site's Web App Manifest: the manifest is located, fetched and validated, and the result lists coded issues, an overall grade (A+ to F), a score

License validation backend for Gumroad and direct software sellers. Verify keys, enforce activation limits, and prevent key sharing without building custom infrastructure.

Extract title, description, Open Graph image, and favicon metadata from any URL — a cached link preview API with built-in SSRF protection for building rich unfurl cards.

Validate and normalize Swedish organisation numbers, Bankgiro numbers and Plusgiro numbers using deterministic format and checksum rules.

Keyless Costa Rica Hacienda v4.4 comprobante validator: official XSD for 8 document types, the 50-digit clave numerica, CABYS code lists, totals/IVA math, XAdES-EPES signature check. Rule-coded JSON r

Check username availability on popular social media platforms like Facebook, Instagram, Twitter, TikTok, and YouTube with ease.

One GET, one graded JSON report a headless Open Graph and Twitter Card validator for CI gates, SEO audits and publishing tools. Give it a page URL or HTML and get a JSON report on the page s

Unleash the Social Media Handle Validator API, your digital compass in the vast social media universe! Submit any handle and watch it traverse Facebook, Instagram, Twitter, TikTok, and YouTube realms, instantly deciphering its presence. Receive a personalized message, guiding you through the availability landscape – shaping your digital identity effortlessly.

Validate structured data markup on any web page including JSON-LD, Microdata, and RDFa. Detects Schema.org types, checks for errors, and returns detailed validation results.

Unleash the potential of the Open Graph Parser API. Effortlessly retrieve diverse metadata from URL links using the open graph protocol. Receive a JSON response, enhancing your content analysis and integration capabilities with ease.

Elevate your online persona with the Social Media Username Validator API – your key to digital identity clarity! Submit any handle and traverse Facebook, Instagram, Twitter, TikTok, and Youtube realms, receiving an instant message guiding you through the availability landscape. Unleash the power to sculpt your unique online presence effortlessly.

Boost your outreach success with the Marketing Outreach Email Authenticity API, ensuring genuine engagement.

Step into the world of Twitter X Handle Validator API, Your virtual guide in the Twitterverse, it swiftly examines handles, separating the stars from the silence. Ensure your chosen handle shines bright. Unleash this API to navigate the realm of tweets and trends, turning your handle dreams into digital reality.

Instantly validate how any URL will appear when shared on Facebook, LinkedIn, Twitter, and WhatsApp. Returns a full JSON report with platform-specific scores, broken tag detection, image dimension checks, and plain-English fix instructions — all in a single API call.

Extracts and validates JSON-LD, Microdata, RDFa, and structured markup from webpages or raw HTML for SEO and technical validation.

Extracts and validates social preview metadata from webpages or raw HTML, including preview titles, descriptions, images, page URLs, content type fields, warnings, errors, and status information.

Generate Open Graph and social-share preview images in PNG format from URL query parameters, including title, subtitle, eyebrow, label, theme, and size.

Understand interest-only mortgage structures with our tool, offering clarity on potential costs and benefits.

Generate clear amortization schedules for your mortgages, allowing for better planning of your repayment strategy.

Quickly assess your debt-to-income ratio with our accurate tool, ensuring your mortgage approval success.

Calculate your balloon payments easily, helping you manage large final payments effectively with our API.

Determine your refinancing break-even point accurately, ensuring you make informed decisions with our intuitive tool.

Evaluate your home buying possibilities with our Affordability Calculator, making budgeting simpler and smarter.

Generate Open Graph social preview images dynamically from templates. Create professional og:image cards for blog posts, products, and social media sharing with customizable text, colors, and layouts.