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Fraud decisions in milliseconds

Defraudo scores every payment, login and registration with rules, device fingerprinting and cross-account linking, and answers allow, review or block.

Quickstart

Create a key, send your first event and read the decision in a few minutes.

Integration guide

Authentication, events, device fingerprint, errors, rate limits and webhooks.

API reference

Every endpoint and schema, with a live "Try it" console.

How it works

From an incoming event to a score and an allow, review or block decision.