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Arcjet · Function

shield

Arcjet Shield is an application-aware WAF for common web attacks and suspicious request patterns. It tracks request metadata over time and lets application code block or handle suspicious requests.

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Syntax

shield({ mode: "DRY_RUN" | "LIVE" });
const decision = await aj.protect(request);

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Source: Shield WAF for Node.js | Arcjet Docs. Checked 2026-11-03.