Will rate limiting break my legitimate integrations?

PowerWAF's adaptive rate limiting learns your normal traffic patterns and sets thresholds accordingly. Known API partners can be allowlisted, and rate limits can be configured per endpoint and per authentication method. Legitimate integrations are not affected during normal operation.

Protect Your API from DDoS with Intelligent Rate Limiting

API Security / DDoS

Your API Is Your Biggest Attack Surface

Modern applications run on APIs — mobile apps, SPA frontends, partner integrations, and microservices all communicate via REST, GraphQL, or gRPC. Every one of these endpoints is a potential DDoS target. Unlike static pages that CDNs can cache, API requests require server-side processing: database queries, authentication checks, business logic, and external service calls.

94% of organizations experienced an API security incident in the past 12 months

A targeted flood on a single expensive endpoint — like search, reporting, or data export — can exhaust your database connections, spike your cloud bill, and take your entire application offline. Traditional DDoS protection focused on bandwidth is useless against application-layer API abuse.

CWE-400 (Resource Exhaustion) OWASP API4 (Resource Consumption)

How Attackers Target Your API

Five attack patterns that exploit API endpoints to exhaust your backend resources.

🌊

Endpoint Flooding

High-volume requests targeting expensive endpoints like search, filtering, and report generation.

POST /api/v1/search × 50,000 req/s

🔑

Auth Endpoint Abuse

Flooding login, registration, and password reset endpoints to exhaust auth services and lock out users.

POST /api/auth/login × 10,000 req/s

📊

Resource-Exhaustion Queries

Crafting requests that trigger expensive operations — deep pagination, complex filters, large data exports.

GET /api/users?page=999999&include=all

🔎

API Enumeration

Rapidly probing API endpoints to discover undocumented routes, extract user data, or map internal services.

GET /api/v1/users/1..100000 (sequential scan)

📩

Webhook Abuse

Flooding webhook callback endpoints or using them as SSRF trampolines to internal services.

POST /api/webhooks/callback × 5,000 req/s

How PowerWAF Protects Your API

Five protection layers designed specifically for API traffic patterns.

⏱️

Per-Endpoint Rate Limiting

Set custom rate limits for each API route based on its expected usage and cost. Expensive endpoints get tighter limits; high-traffic endpoints stay open.

Stops targeted endpoint flooding

🔑

Token-Based Throttling

Rate limit by API key, Bearer token, or custom header — not just by IP. Per-client limits prevent one misbehaving integration from affecting others.

Stops abuse from authenticated clients

🧠

Adaptive Rate Limits

Machine learning models baseline your normal API traffic and automatically tighten limits during anomalous spikes. No manual threshold configuration needed.

Adapts to traffic patterns in real time

🔍

API Key Validation

Validates API keys at the edge before requests reach your server. Invalid, expired, or revoked keys are rejected immediately — saving backend resources.

Offloads auth validation to the edge

💾

Response Caching

Cache frequent API responses at the edge with configurable TTLs. Reduces backend load for read-heavy endpoints while keeping data fresh.

Absorbs read-heavy traffic at the edge

Protected in Minutes, Not Months

No SDK. No middleware. No code changes.

Point DNS

Route your API traffic through PowerWAF. Works with any API framework or hosting provider.

→

Configure Rules

Set per-endpoint rate limits, authentication requirements, and throttling policies via the dashboard.

→

Monitor Everything

Real-time API traffic analytics showing request rates, error rates, and blocked abuse per endpoint.

Works with REST, GraphQL, gRPC-Web, and WebSocket APIs on any infrastructure.

See PowerWAF in Action

Real-time view of API DDoS attack being mitigated — abusers blocked, legitimate integrations unaffected.

powerwaf-api-log — live

13:05:01 BLOCKED 198.51.100.87 POST /api/v1/search → Rate exceeded: 2,340 req/min (limit: 60)

13:05:01 BLOCKED 198.51.100.23 POST /api/auth/login → Rate exceeded: 890 req/min (credential stuffing)

13:05:02 ALLOWED 203.0.113.50 GET /api/v1/products → Valid API key (partner-acme, 12 req/min)

13:05:02 BLOCKED 203.0.113.42 GET /api/v1/users?page=99999 → Resource exhaustion: deep pagination attack

13:05:03 ALLOWED 198.51.100.12 POST /api/v1/orders → Valid request (mobile app, 3 req/min)

13:05:03 BLOCKED 203.0.113.71 GET /api/v1/users/1 → API enumeration: sequential ID scan (blocked at ID 4,521)

13:05:04 BLOCKED 198.51.100.87 POST /api/webhooks/stripe → Invalid webhook signature (forged callback)

Simulated log showing PowerWAF protecting API endpoints with per-route rate limiting and abuse detection.

Proven Protection at Scale

< 5 minAverage setup time — DNS change only

0Lines of API code to modify

24/7Continuous API monitoring and rate enforcement

Real-World Scenarios

Fintech API Under Targeted Flood

A payment processing API receives a sustained flood on the /transactions endpoint. Each request triggers database writes and external payment gateway calls. PowerWAF’s per-endpoint rate limiting caps the flood while legitimate transactions process normally.

SaaS REST API Abuse

A free-tier API user writes a script that hammers the search endpoint 10,000 times per hour, degrading performance for all users. PowerWAF’s token-based throttling rate-limits by API key, isolating the abuser without affecting paid customers.

Mobile App Backend Spike

A mobile app push notification triggers millions of simultaneous API requests. PowerWAF’s adaptive rate limits distinguish the legitimate traffic spike from abuse, scaling protection without blocking real users.

Works with any API framework

Express / Node.js

Django REST

Laravel API

Spring Boot

FastAPI

Go / Gin

Ruby on Rails

ASP.NET Web API

GraphQL

Custom APIs

Frequently Asked Questions

Why are APIs especially vulnerable to DDoS?

APIs can’t be protected by CDN caching (most requests are dynamic), each request triggers server-side processing, and endpoints are publicly documented — attackers know exactly which endpoints to target.

How does per-endpoint rate limiting work?

PowerWAF lets you set different rate limits for each API endpoint based on its expected usage. For example, /api/login might allow 10 requests per minute per IP, while /api/products might allow 100.

Does PowerWAF support API key-based rate limiting?

Yes. PowerWAF can rate-limit by API key, Bearer token, or custom header — not just by IP. This ensures per-client limits even when multiple clients share the same IP.

Can PowerWAF protect GraphQL APIs?

Yes. PowerWAF can limit query complexity, restrict query depth, and rate-limit by operation name — preventing resource-exhaustion attacks on your GraphQL endpoint.

Will rate limiting break my integrations?

PowerWAF’s adaptive rate limiting learns your normal traffic patterns. Known API partners can be allowlisted, and limits are configured per endpoint and per auth method.

Do I need to change my API code?

No. PowerWAF operates as a reverse proxy. Rate limiting and DDoS protection happen at the proxy layer — no SDK, no middleware, no code changes required.

Explore More WAF Protection

PowerWAF protects against the full spectrum of web threats.

Protect Your API Today

No credit card required. No code changes. Set up in under 5 minutes.

Start with a Free Plan See Prices

Limited free plan spots available