RetryZero
Combat Free Trial Abuse
Developer-first API that blocks free trial abuse by detecting disposable emails, fingerprinting devices, and scoring risky user behavior.
RetryZero API - Live Logs
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Disposable Email Detection
Automatically detect and block disposable email addresses used for trial abuse.
Device Fingerprinting
Identify unique devices to prevent multiple trial signups from the same hardware.
Risk Scoring
Advanced algorithms to score user behavior and identify potential abuse patterns.
How It Works
Simple integration, powerful protection
1. Integrate Our API
Add a few lines of code to your signup flow. We provide SDKs for all major platforms.
1// Example API call
2const riskScore = await retryZero.checkUser({
3 email: user.email,
4 deviceId: device.fingerprint,
5 ipAddress: request.ip
6});2. Get Risk Assessment
Receive a comprehensive risk score and detailed analysis of potential threats.
Low risk - Allow signup
Medium risk - Additional verification
High risk - Block signup
Try It Now
Test our fraud detection API with real examples
Test Input
Enter user data to test our fraud detection
API Response
Live fraud detection results
No response yet
Click "Check for Fraud" to see results
Demo Notice
This is a live demo using our fraud detection API. The examples above demonstrate different risk levels based on email domains, user agents, and other factors.
Simple Pricing
Start free, scale as you grow
Free
Perfect for getting started
$0
- 1,000 API calls/month
- Basic email detection
- Standard support
Pro
For growing businesses
$49
- 50,000 API calls/month
- Advanced detection
- Priority support
Enterprise
For large scale operations
Custom
- Unlimited API calls
- Custom integrations
- Dedicated support
Ready to Protect Your Trials?
Join the other developers who trust RetryZero to protect their free trials.