LeadCop
Real-time disposable email guard
Blocks 200,000+ burner and temporary email providers before they hit your database, classifying every signup in under 100ms.
- Detection accuracy
- 99.7%
- Response time
- <100ms
- Domains blocked
- 200K+
Fake signups quietly poison a business: inflated user counts, wasted onboarding emails, skewed analytics, and sender reputation that erodes every time a burner inbox bounces.
LeadCop is the API we built to stop that at the door. It classifies signups in under 100ms with 99.7% accuracy, catching disposable domains, role accounts, and typo'd addresses before they reach your database.
We designed, engineered, and operate it ourselves, and it now powers signup forms across SaaS products, agencies, and e-commerce stores.
What it does
200,000+ disposable domains
A continuously updated blocklist of burner and temporary email providers.
Sub-100ms responses
Fast enough to validate inline as the user types, without slowing signup.
Role & typo detection
Flags info@, admin@, and common misspellings like gmial.com.
Simple REST API
One request, one clear verdict. Drop it into any stack in minutes.
