TirnosAnti-fraud SDK for modern apps.

Collect browser + behavioural signals. Get allow | shadow | challenge | block decisions in milliseconds. Tweak rules without redeploying.

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Under 10 KB gzipped

No runtime dependencies. Loads as a script tag or an ES module. Fails open on network errors so your UX never breaks because of SDK issues.

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Built-in rules for velocity, device reputation, clusters, geography. Add your own JsonLogic expressions via the dashboard — no redeploy.

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Test a rule change against the last 7 days of real traffic. See the confusion matrix before you ship the rule live.

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Browser check is the fast path. Back it with a server-side /v1/check call for payments, password resets, account-level decisions.