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## Fraud API v3 adds risk type codes

Fraud API v3.0.0 returns a `riskTypes` field alongside `probability`: the four-digit codes that explain why an IP address, device ID or user agent is flagged. Codes follow the format class, category, type, so you can block at any level: all SIVT (`2xxx`), one category (`25xx`) or a single type (`2502`), alone or together with a probability threshold.

To move to v3, change the base URL from `https://fraud-api.pixalate.com/api/v2` to `https://fraud-api.pixalate.com/api/v3` and read `riskTypes` from the response. v2 remains available as a legacy API. See [Migrate from v2 to v3](/apis/fraud-api-v2-to-v3), [Risk types and codes](/apis/fraud-api-risk-types) and [IVT Taxonomy 2.0](/trust/ivt-taxonomy).