- Breach checks tell you whether an email or password has appeared in a known data breach, so you can protect accounts at sign up, at login and over time.
- Gender prediction estimates gender from a name, email or username, one at a time or 50 at a time, with explicit unknown results when the signal is weak.
Start here
Quickstart
Make your first request in under 5 minutes.
API reference
Every endpoint, field and response, with a live playground.
Authentication
Create, store and rotate API keys.
Errors
Every error code and what to do about it.
What you can build
Safer sign ups
Reject passwords that already appear in breach lists before they reach your database.
Breach alerts
Tell users when their email shows up in a breach and prompt a password change.
Contact enrichment
Add a gender estimate to CRM records, 50 contacts per request.