LeakCheck API
Authentication & Security
Data breach intelligence API to verify compromised emails and protect against credential stuffing
LeakCheck API Highlights
LeakCheck API is best for security teams, identity platforms, and SaaS apps wanting to protect users from compromised credentials
API Key (X-API-Key header / query parameter)
3 requests per second on public tier; enterprise concurrency available
Nigeria
Ghana
KenyaLeakCheck is a data breach detection and credential intelligence platform that indexes billions of compromised records from public data leaks, combo lists, and stealer logs. Through its public REST API, developers and organizations can check whether specific email addresses or corporate domain credentials have been compromised in known security incidents.
For Nigerian startups building user registration flows, password reset forms, or corporate IT identity monitoring, the LeakCheck API allows implementing proactive credential protection. When a user creates an account or changes their password, applications can verify whether the credentials exist in active stealer dumps, safeguarding against credential-stuffing attacks.
LeakCheck API Core Features & Capabilities
| Feature | Status | Description & Capabilities |
|---|---|---|
| Threat Intelligence Feeds | ✓ Supported | Provides native Threat Intelligence Feeds capabilities integrated within the API. |
| Credential / Password Leak Check | ✓ Supported | Provides native Credential / Password Leak Check capabilities integrated within the API. |
| Compliance Reporting | ✓ Supported | Provides native Compliance Reporting capabilities integrated within the API. |
| Real-time Security Alerts | ✓ Supported | Provides native Real-time Security Alerts capabilities integrated within the API. |
| Vulnerability Scanning | ✗ Not Supported | This verification service is not offered by LeakCheck API. |
| Malware & Phishing Detection | ✗ Not Supported | Malware & Phishing Detection is currently not supported by LeakCheck API. |
| IP & Domain Reputation | ✗ Not Supported | IP & Domain Reputation is currently not supported by LeakCheck API. |
| SSL / Certificate Monitoring | ✗ Not Supported | SSL / Certificate Monitoring is currently not supported by LeakCheck API. |
- Public API available for free data breach verification
- Premium commercial API plans starting at €14.99/month for full search queries and automated domain monitoring
Required Access Documents for LeakCheck API
- LeakCheck AccountOptionalRegister at leakcheck.io for public and commercial API credentials
Different LeakCheck API use cases
- User Signup Credential Screening:Warn customers during onboarding if their email has been exposed in public breaches.
- Corporate Account Monitoring:Audit all employee email addresses under a company domain to prevent unauthorized access.
- Credential Stuffing Mitigation:Block login attempts using compromised passwords exposed in known credential dumps.