ONCE Fraud API — risk score and flags for an email

Returns the overall weighted fraud score, severity, and the individual signal flags for an email. Requires an API key (Personal Access Token) with the once:fraud scope, created in the ONCE dev center. Never returns IPs, other-account data, or any internal detection details — only scores and flags. Free during a limited-time beta.

post/fraud/score

Request body

emailstring email required

Email address to check.

Response

Fraud score and flags

emailstring email required

scoreinteger required

Overall weighted risk score, 0..maxScore.

maxScoreinteger required

Scoring ceiling.

severity'none' | 'low' | 'medium' | 'high' | 'critical' required

computedAtstring date-time nullable

Last time this account was scored, or null if never scored.

Changes

No recorded changes to this endpoint across all 1 revision of this API.