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Arcjet · Function

isRateLimit

Arcjet rate limiting restricts client requests over time. After protect runs, use the decision and its reasons to detect a rate-limit denial and return the right response.

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Syntax

const decision = await aj.protect(req, { requested });

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  • fixedWindow
  • tokenBucket
  • ArcjetDecision
  • ArcjetRuleResult
  • decision.isDenied()
  • decision.reason.isRateLimit()
  • decision.results

Source: Rate limiting reference for Next.js | Arcjet Docs. Checked 2026-11-03.