BUILDSENIOR

Build a Rate Limiter Service

75 minutes

0 completed

nextjsalgorithmssystemsrate-limiting

Description

Build a rate limiting service with multiple algorithms, a dashboard, and a JavaScript SDK.

Requirements

Implement two algorithms: Token Bucket and Sliding Window

HTTP API: POST /check with {key, limit, window} returning {allowed, remaining, resetAt}

Dashboard showing: active keys, request counts, blocked requests

Real-time chart of requests per second

Configurable rate limits per key via dashboard

In-memory storage with optional Redis (abstract storage layer)

JavaScript SDK for easy integration

Use Next.js API routes. Token bucket: refill tokens at fixed rate. Sliding window: count requests in rolling time window.

Distributed rate limiting with Redis

Rate limit headers in responses (X-RateLimit-*)

Burst allowance configuration

You will be guided through MCP setup before the timer starts