MailCheck Email Validation FadSync API

FadSync MailCheck Email Validation API

2 followers

FadSync MailCheck Email Validation API

2 followers

Stop free-trial abuse and database bloat instantly. FadSync MailCheck is an enterprise-grade email validation API that detects and blocks temporary, disposable, and high-risk email addresses before they pollute your system. With an edge-optimized architecture averaging a 50ms response time, our engine instantly recognizes over 40 million burner domains (10MinuteMail, TempMail, etc.) without adding friction to your user onboarding. Trusted by 500+ enterprises.

MailCheck Email Validation FadSync API gallery image

Free

Launch tags:API•SaaS•Developer Tools

Launch Team / Built With

Framer AI AgentsDesign and publish professional sites with AI

Promoted

Maker

📌

Hey Product Hunt! 👋 I'm the founder of FadSync Development Studio. We noticed a massive problem across the SaaS and e-commerce space: platforms were constantly bleeding server resources, proxy bandwidth, and actual revenue due to users creating endless fake accounts with disposable emails just to loop 7-day free trials. We built FadSync MailCheck to plug this exact leak. ⚡ What it does: It’s a simple REST API (just send a GET request) that references a constantly updated database of 40 Million+ burner domains. ⏱️ Performance: It averages a 50ms response time, so it won't slow down your onboarding flows. We've opened up a free tier so developers can test the integration immediately. I’d love to hear your feedback, and I'll be here all day answering any technical questions about our infrastructure or integration methods!

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3mo ago

Maker

🚀 Big Update: Official MailCheck SDKs for Flutter, Node.js & Python are Live!

Hey everyone! A quick update on MailCheck Email Validation FadSync API. Since our launch, we’ve been listening closely to your feedback, and we want to make integrating email security and validation as seamless as possible for your tech stack.

We have officially released robust SDKs for:

Flutter 📱 (Protect your mobile sign-ups natively)
Node.js 🟢 (Streamline your backend user onboarding)
Python 🐍 (Integrate easily with your data scripts and web apps)

Why protect your SaaS in just one click? Stop disposable emails, spam bots, and fake sign-ups before they even hit your database. With our new SDKs, you can set up real-time email verification with just a few lines of code—saving your server resources, protecting your sender reputation, and securing your SaaS instantly.

Check out the updated documentation and start integrating today! Let us know what you think in the comments below. 👇

https://mailcheck.fadsync.com/docs/

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3mo ago

Forum Threads

p/mailcheck-email-validation-fadsync-api

•

3mo ago

How do you keep authentication flows ultra-fast when adding security checks? ⚡

Hey PH community!

When building sign-up and authentication flows, every extra 100ms of latency can lower conversion rates. However, skipping validation checks leaves your platform wide open to bot registrations and disposable email abuse.

When we built MailCheck API, our primary engineering focus was keeping response times under 50ms at the edge so security checks wouldn't impact the onboarding experience.

Questions for the devs here:

p/mailcheck-email-validation-fadsync-api

•

3mo ago

We tracked 40M+ disposable email domains—here is how burner emails evolve 🔍

Hey everyone!

Temporary email services like 10MinuteMail and TempMail are evolving fast. Burner domain providers constantly rotate their top-level domains (TLDs) and use custom MX record configurations to bypass standard domain blocklists.

While compiling and maintaining our dataset of 40+ million blocked domains, we noticed a huge surge in temporary emails using non-standard TLDs specifically to bypass basic regex filters on SaaS signup forms.

Curious to hear from founders and product leads:

p/mailcheck-email-validation-fadsync-api

•

3mo ago

Built an enterprise-grade validation microservice as a solo builder—AMA! 🚀

Hey Product Hunt!

After seeing multiple SaaS platforms waste server resources and proxy bandwidth on fake accounts, I decided to build MailCheck API a high-performance microservice designed to stop trial abuse right at the signup door.

Building high-availability infrastructure with sub-50ms latency as an independent builder came with some great technical challenges.

Ask Me Anything about:

View all

🚀 Big Update: Official MailCheck SDKs for Flutter, Node.js & Python are Live!

We have officially released robust SDKs for:

Flutter 📱 (Protect your mobile sign-ups natively)
Node.js 🟢 (Streamline your backend user onboarding)
Python 🐍 (Integrate easily with your data scripts and web apps)

Check out the updated documentation and start integrating today! Let us know what you think in the comments below. 👇

https://mailcheck.fadsync.com/docs/