API Rate Limiter
Add rate limiting to any API in 5 minutes with no infrastructure changes
API Rate Limiter is a middleware-as-a-service layer that enforces per-key, per-IP, and per-tenant request quotas in front of any HTTP API. Supports token bucket, sliding window, and fixed window algorithms. Deploy as a reverse proxy or call our validation endpoint from your existing gateway.
MRR
$14,320
+12% this month
Active
487
+23 this month
Churn
1.8%
-0.4% this month
$14K/mo
Verified revenue
73%
Choose annual
98.7%
Uptime SLA
<2min
Setup time
The Problem
Sound familiar?
Writing Redis-backed rate limiting correctly is harder than it looks
No easy way to enforce different quotas per pricing tier
Abuse spikes can take down the entire API without proper throttling
The Solution
API Rate Limiter fixes this.
Three Algorithm Choices
Token bucket (smooth bursting), sliding window (precise quotas), and fixed window (simple billing alignment) — choose per-route or per-key.
Tier-Based Quotas
Map your pricing plans to quota profiles. Free plan gets 100 req/min; Pro gets 1000 req/min — enforced automatically when keys are tagged.
Proxy or Validate Mode
Run as a full reverse proxy in front of your origin, or call /check to validate from your existing load balancer or API gateway.
How It Works
Set up in under 2 minutes. No complex configuration.
Three Algorithm Choices
Token bucket (smooth bursting), sliding window (precise quotas), and fixed window (simple billing alignment) — choose per-route or per-key.
Tier-Based Quotas
Map your pricing plans to quota profiles. Free plan gets 100 req/min; Pro gets 1000 req/min — enforced automatically when keys are tagged.
Proxy or Validate Mode
Run as a full reverse proxy in front of your origin, or call /check to validate from your existing load balancer or API gateway.
Real-Time Abuse Dashboard
See top consumers, quota breaches, and suspicious patterns in a live dashboard. One-click block for abusive keys.
Retry-After Headers
Responses include standard Retry-After and X-RateLimit-* headers so clients can back off gracefully instead of hammering on 429.
Why not the alternatives?
Same result. A fraction of the price.
| Product | Price | Core feature |
|---|---|---|
| API Rate Limiter | $19/mo | Add rate limiting to any API in 5 minutes with no infrastructure changes |
| Enterprise tool | $149/mo | Overkill for most teams |
| DIY approach | 40+ hrs dev | High maintenance burden |
Integrates with your stack
Simple, Transparent Pricing
No per-user fees. No hidden costs. Cancel anytime.
Starter
- 10 API keys
- 1M checks/mo
- All algorithms
- Tier-based quotas
- Abuse dashboard
- Email alerts
Pro
- Unlimited keys
- 20M checks/mo
- Proxy mode
- Webhook on threshold breach
- Custom response bodies
- Priority support
Frequently Asked Questions
What latency does the /check endpoint add?
Median latency is under 3ms from any AWS or GCP region. The service is deployed globally via edge nodes.
Can I rate limit by IP and API key simultaneously?
Yes — you can stack multiple dimensions (IP + key + tenant) with separate quotas at each level.
Ready to get started?
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