▸case-01 We need to set up rate limiting for our developer platform's REST endpoints. Can you design a distributed rate limiting architecture using Redis that supports Free and Enterprise subscription tiers, handles short bursts, and returns standard HTTP headers along with a 429 response format when limits are hit? | fail→fail | 23,181 | 30,149 | +30% | 1 | 1 | 0% | 4,484 | 5,684 | +27% | 0 | 0 | — |
▸case-02 We are building an API gateway for our public endpoints. Developers complain that fixed window counters allow double the allowed request rate near window boundaries. Design a rate limiting configuration for our middleware that solves this boundary spike issue while maintaining state across multiple server instances. | pass→pass | 27,536 | 29,842 | +8% | 1 | 1 | 0% | 3,722 | 5,483 | +47% | 0 | 0 | — |
▸case-03 Our client application team needs standard HTTP response headers returned on every API response so they can proactively slow down traffic before hitting limits. Provide the HTTP header specification and YAML schema for returning overall limit, remaining quota, and reset timestamp. | fail→pass | 11,185 | 21,928 | +96% | 1 | 1 | 0% | 2,296 | 3,975 | +73% | 0 | 0 | — |
▸case-04 We are launching a SaaS API with Free and Pro subscription tiers. The Free tier should allow up to 100 requests per hour with temporary burst headroom, while the Pro tier allows 10,000 requests per hour. Construct a YAML configuration defining these tier limits, windows, burst capacity, and 429 error response structure. | pass→pass | 17,037 | 16,778 | -2% | 1 | 1 | 0% | 2,354 | 2,739 | +16% | 0 | 0 | — |
▸case-05 When an API caller exceeds their allocated rate limit, our gateway needs to reject the request gracefully. Draft the full HTTP response headers and payload format returned to throttled clients, assuming we want them to know when they can safely send their next request. | pass→pass | 16,593 | 18,225 | +10% | 1 | 1 | 0% | 2,276 | 3,228 | +42% | 0 | 0 | — |
▸case-06 We run a horizontally auto-scaled cluster of API instances behind a load balancer. Local in-memory counters are causing inconsistent throttling across nodes. Propose a system configuration to synchronize rate limit counts across all nodes without hitting a relational database on every request. | pass→pass | 20,905 | 34,190 | +64% | 1 | 1 | 0% | 2,698 | 6,130 | +127% | 0 | 0 | — |
▸case-07 Our payment gateway API experiences sudden 2-second spikes in traffic during checkout flows, causing clients to get throttled even when their hourly total volume is well within limits. How should our rate limiter configuration accommodate brief traffic spikes without permanently increasing their hourly ceiling? | pass→pass | 21,665 | 21,896 | +1% | 1 | 1 | 0% | 2,903 | 3,620 | +25% | 0 | 0 | — |
▸case-08 We have both authenticated API keys and unauthenticated public web traffic coming through the same gateway. Define how the rate limiter key extraction rule should identify clients to prevent multi-tenant IP collusion on corporate NAT gateways while still limiting anonymous users. | pass→pass | 18,580 | 25,690 | +38% | 1 | 1 | 0% | 3,221 | 4,648 | +44% | 0 | 0 | — |
▸case-09 Our downstream partner service requires requests to arrive at a steady, smooth pace without any sudden bursts, under a hard cap of 50 requests per second. Design a rate limiting setup for our outbound webhook dispatcher to enforce smooth flow. | pass→pass | 19,557 | 29,729 | +52% | 1 | 1 | 0% | 3,335 | 6,053 | +81% | 0 | 0 | — |
▸case-10 Our origin servers are being overwhelmed by scrapers before traffic even hits our application gateway layer. Recommend an integration strategy to enforce rate limits at the CDN edge layer before requests reach origin infrastructure. | pass→pass | 24,061 | 24,434 | +2% | 1 | 1 | 0% | 3,163 | 4,732 | +50% | 0 | 0 | — |
▸case-11 Our API platform needs to enforce both a strict 100 requests-per-second spike shield and a monthly billing quota of 1,000,000 requests per tenant. Architect a rate limiting storage configuration specifying where short-term rate limits versus monthly quotas are stored. | pass→pass | 26,015 | 30,868 | +19% | 1 | 1 | 0% | 3,467 | 5,207 | +50% | 0 | 0 | — |
▸case-12 Our customer support team needs to temporarily bypass or double an enterprise customer's rate limit during a live marketing event without redeploying the API gateway service. Design the administrative REST API endpoint payload structure for updating rate limits dynamically. | fail→pass | 23,555 | 21,591 | -8% | 1 | 1 | 0% | 3,555 | 4,916 | +38% | 0 | 0 | — |
▸case-13 Our platform observability dashboard needs visibility into rate limit metrics—specifically tracking total requests allowed versus throttled requests per tenant. Specify the metric names, tags, and data structure for telemetry emission. | pass→pass | 17,689 | 25,160 | +42% | 1 | 1 | 0% | 3,378 | 4,255 | +26% | 0 | 0 | — |
▸case-14 Create a JSON response payload specification for rate limit rejections that conforms to standard RFC 7807 problem details format while providing actionable retry context to client developers. | pass→pass | 15,319 | 22,065 | +44% | 1 | 1 | 0% | 3,188 | 5,310 | +67% | 0 | 0 | — |
▸case-15 When implementing a sliding window algorithm in Redis for high-throughput API traffic, team members are debating whether to use string keys, hashes, or sorted sets. Recommend the Redis storage data structure and command strategy needed for an accurate sliding window implementation. | pass→pass | 23,568 | 20,516 | -13% | 1 | 1 | 0% | 3,183 | 4,138 | +30% | 0 | 0 | — |
▸case-16 Write a declarative YAML file for an API gateway rate limiting plugin that enforces 500 requests per minute with a burst allowance of 50 for all routes tagged under the data API path. | pass→pass | 21,608 | 12,846 | -41% | 1 | 1 | 0% | 3,006 | 2,372 | -21% | 0 | 0 | — |
▸case-17 Our application runs in US-East and EU-West regions. A single client could split traffic across both regions to double their usage allowance. Design a distributed state sync strategy that prevents cross-region quota evasion without adding synchronous cross-region latency to every request. | pass→pass | 27,960 | 35,636 | +27% | 1 | 1 | 0% | 3,698 | 5,765 | +56% | 0 | 0 | — |
▸case-18 We have default tier definitions (Free, Standard, Enterprise), but specific VIP accounts require customized request limits and higher burst factors. Design a YAML configuration schema that models default tiers alongside tenant-specific overrides. | pass→pass | 16,751 | 24,620 | +47% | 1 | 1 | 0% | 3,294 | 4,278 | +30% | 0 | 0 | — |
▸case-19 When configuring rate limit windows across developer configuration files, developers often write ambiguous durations like '3600' or '60'. Specify the clear configuration format for time windows and write a YAML example for a 1-hour window rate limit. | pass→pass | 15,725 | 8,694 | -45% | 1 | 1 | 0% | 1,928 | 2,044 | +6% | 0 | 0 | — |
▸case-20 We need to configure our API Gateway authentication layer to issue and verify RS256 signed JSON Web Tokens (JWT) for client microservices. Provide a YAML configuration defining public key locations, token expiration defaults (15 minutes), and issuer validation fields. | pass→fail | 15,041 | 10,646 | -29% | 1 | 1 | 0% | 2,744 | 2,357 | -14% | 0 | 0 | — |
▸case-21 Our REST API gateway needs middleware to validate inbound POST request JSON payloads against a JSON Schema before forwarding requests to backend microservices. Provide a NodeJS middleware setup that validates request bodies against a required schema and returns HTTP 400 Bad Request on failure. | pass→pass | 13,199 | 22,917 | +74% | 1 | 1 | 0% | 2,707 | 4,197 | +55% | 0 | 0 | — |
▸case-22 Our web portal API gateway needs to enable Gzip and Brotli response compression for responses larger than 1KB to reduce client latency. Provide an Nginx or API gateway configuration snippet setting compression thresholds and supported MIME types. | pass→pass | 15,821 | 16,984 | +7% | 1 | 1 | 0% | 2,218 | 2,919 | +32% | 0 | 0 | — |