Stop temp emails.
Keep real users.
High-performance API to detect disposable email addresses. One request. One boolean. 100 free requests/day.
How to Detect Disposable Emails Automatically
Add real-time disposable email detection to your signup flow with a single API request. TempMailChecker blocks Mailinator, 10MinuteMail, GuerrillaMail, and 277,000+ temporary email domains with sub-millisecond processing and ~70ms real-world latency from US, EU & Asia endpoints — stopping fake accounts before they enter your database.
Add Email Check
Call our API when a user signs up to verify their email address.
GET /check?email=...
Check Response
Block or flag users where the response returns:
{ "temp": true }
You're Protected
That's it — your platform now blocks disposable email signups automatically.
✓ Spam-free signups
Use Cases: When to Block Temporary Emails
Temporary email addresses are used for fake signups, promo abuse, spam, and fraud. Whether you're running a SaaS, newsletter, community, or e-commerce store — blocking throwaway emails protects revenue, analytics, and user trust.
Block Fake Signups
Stop bots and throwaway accounts at the registration gate. Ensure every user in your database is real.
Improve Conversions
Disposable emails don't convert. Filter them out to focus your sales and marketing efforts on real leads.
Protect Promos
Prevent referral fraud and coupon abuse. Stop users from creating infinite accounts to farm rewards.
Clean Your Lists
Remove dead-end disposable addresses from your newsletters to improve deliverability and open rates.
Reduce Abuse
Spammers use disposable emails to harass users. Block them at the door to keep your community safe.
Protect Communities
Keep comments, reviews, and chat real. Ensure user accountability by requiring permanent email addresses.
Features: The Fastest Disposable Email Detection API
Built for developers who need instant abuse prevention without complexity. One GET request, one JSON response — no SDKs, no dependencies. Integrate in minutes and automatically update as new disposable domains emerge daily.
Simple JSON
One simple GET request returns a clean JSON response. No complex objects or SOAP envelopes.
Ultra-Fast
Sub-millisecond API processing with ~70ms real-world latency from US & EU endpoints. Won't slow down your signup flow.
Massive Database
We track over 277,000 known disposable email domains and update our list daily.
Auto-Updates
Our background workers constantly crawl and verify new spam domains so you don't have to.
Works Everywhere
REST API works with Node, Python, PHP, Go, Ruby, or standard cURL. No SDK required.
100 Free Requests/Day
Get 100 API requests per day during beta. No credit card required. Perfect for small projects and testing.
⚡ Designed for Real-Time Signup Flows
Sub-millisecond processing and ~70ms real-world latency from dual regional endpoints — fast enough to run synchronously without slowing your users down.
Pick Your Endpoint
Choose the closest region — no probes, no guessing:
tempmailchecker.com
EU Region
us.tempmailchecker.com
US Region
asia.tempmailchecker.com
Asia Region
Real-World Latency
Europe
~25ms
N. America
~40ms
Asia-Pacific
~30ms
Why This Matters
Most detection APIs are too slow for synchronous signup requests. TempMailChecker runs inline — not in background jobs.
👉 Disposable emails blocked before they reach your database.
Pricing — Free Disposable Email Checker API
Get 100 free API requests per day — no credit card required. Great for MVPs, side projects, and production apps. Beta users lock in free limits forever, even after pricing launches.
- Full API access — no feature limits
- 277,000+ disposable domains detected
- Sub-ms processing, ~70ms worldwide
- No credit card required
- Beta users keep limits forever
Need more than 100 requests/day? Reply to your onboarding email for a free upgrade during beta.
FAQ — Disposable Email Detection & API Usage
Find answers about detecting fake emails, blocking temp mail services, preventing referral and promo fraud, and using the TempMailChecker API in signup or checkout flows. Less spam, fewer fake users, stronger conversions.