What HTTP status code should be returned when rate limits are exceeded?

HTTP 429 (Too Many Requests) along with a Retry-After header indicating when the client may retry.

Web Security

How to Implement Rate Limiting in Web Applications to Stop Brute Force

Protect login endpoints and API routes from credential stuffing and automated abuse using sliding-window rate limiting algorithms.

Written by Marcus Thorne

Published: 10/06/2026 7 min read

Mitigating Automated Abuse

Rate limiting restricts how many requests a user or IP address can submit within a specific timeframe, defending against credential brute-forcing, content scraping, and denial-of-service attempts.

Marcus Thorne

Head of Technology & Web Engineering

Marcus is a full-stack engineer and educator who has architected fintech payment gateways, secure authentication engines, and performant data pipelines using modern PHP and MySQL.

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