Microsoft Account Checker

Outlook / Hotmail Username Availability — Bulk Email Checker

maged120/outlook-username-checker

Check if an Outlook/Hotmail/Live email username is available for registration. Verify multiple usernames in bulk.

Gmail Username Availability — Bulk Email Registration Checker

maged120/gmail-availability

Check whether Gmail usernames are available for new account registration. Verify a list of usernames in bulk without creating any accounts.

Web Accessibility Checker

louisdeconinck/web-accessibility-checker

Audit your entire website for WCAG 2.1 & 2.2 compliance using the industry-standard axe-core engine. Automatically crawl pages, detect accessibility violations, and generate detailed actionable reports to ensure legal compliance and improve SEO.

Email Domain Blacklist Checker

trovevault/email-domain-blacklist-checker

Check any domain against 15 email blacklists (Spamhaus, SURBL, SpamCop, Barracuda and more) and validate SPF, DMARC and MX records. No API keys required. Export data, run via API, schedule and monitor runs, or integrate with other tools.

DMARC & Email Security Checker

taroyamada/dns-dmarc-security-checker

Validate domain infrastructure in bulk to boost email deliverability. Extract DMARC policies, SPF records, and MX configurations to keep outreach out of spam.

Bulk SMTP Email Verifier — Mailbox & Catch-All Checker

automation-lab/smtp-email-verifier

Deep-verify lead emails with SMTP RCPT checks before campaign upload. Classify valid, invalid, catch-all, disposable, unknown, and risky mailboxes; no email is sent and no third-party verification API is required.

Caniuse Browser Compatibility Checker

automation-lab/caniuse-browser-compatibility-checker

Check browser support for CSS, HTML, and JavaScript features using the caniuse database. Returns a compatibility matrix across Chrome, Firefox, Safari, Edge, mobile browsers, and global coverage stats.

Tech Stack Detector API - BuiltWith & Wappalyzer Alternative

tugelbay/website-tech-stack-detector

Tech stack detector and website technology checker API. BuiltWith/Wappalyzer alternative for bulk URL enrichment: detect 100+ CMS, ecommerce. Guide: https://konabayev.com/tools/website-tech-stack-detector/?utm_source=apify_info&utm_medium=referral&utm_campaign=website-tech-stack-detector

Look up MX (Mail Exchange) DNS records for any domain. Verify email server configuration, check mail routing, and validate domain email deliverability.

Substack Leaderboard Scraper 📊

easyapi/substack-leaderboard-scraper

Scrape detailed publication data from Substack leaderboards. Get comprehensive insights about top newsletters including subscriber counts, pricing, author details, and more. Perfect for newsletter research and market analysis.

Bulk Email MX Verifier — Cold Email List Cleaner

automation-lab/email-mx-verifier

Clean scraped or purchased B2B lead lists before outreach. Bulk-check email syntax, MX records, disposable domains, providers, role/risk signals, and optional SMTP probe with no external API. Export CSV/JSON for Instantly, CRM, and campaign tools.