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API Rate Limit Planner
Calculate optimal rate limits, compare algorithms, and plan infrastructure capacity. Design multi-tier pricing with burst handling and DDoS protection.
Traffic Configuration
Normal traffic load
Maximum expected burst traffic
Average API response time
Infrastructure
Memory for rate limit storage
Total Capacity
12,000 RPS
Utilization
4.2%
Rate Limiting Algorithm
Token Bucket
Tokens are added at a constant rate. Each request consumes a token. Allows bursts up to bucket capacity.
Sliding Window Log
Tracks timestamp of each request in a sliding time window. Most accurate but memory intensive.
Fixed Window Counter
Counts requests in fixed time windows (e.g., per minute). Resets at window boundary.
Leaky Bucket
Requests enter a queue and are processed at a constant rate. Smooths out bursts.
Recommended Configuration
Algorithm
Token Bucket
Rate (tokens/sec)
100
Burst Capacity
500
RPS per Server
33
Peak per Server
167
Redis Memory
Allocated1024 MB
Needed0.48 MB
Status✓ Sufficient
Pricing Tiers
free
60 req/min
$0.00
per month
Daily: 86,400
Monthly: 2,592,000
basic
600 req/min
$25.92
per month
Daily: 864,000
Monthly: 25,920,000
⚡ Burst: 2x allowed
pro
6,000 req/min
$129.60
per month
Daily: 8,640,000
Monthly: 259,200,000
⚡ Burst: 3x allowed
enterprise
60,000 req/min
$648.00
per month
Daily: 86,400,000
Monthly: 2,592,000,000
⚡ Burst: 5x allowed
DDoS Protection
Normal Traffic100 RPS
DDoS Threshold (100x)10,000 RPS
Protection Needed?No
Selected Algorithm Details
Token Bucket
Tokens are added at a constant rate. Each request consumes a token. Allows bursts up to bucket capacity.
Pros:
- ✓ Handles burst traffic well
- ✓ Simple to implement
- ✓ Smooth rate limiting
- ✓ Industry standard (AWS, Google)
Cons:
- ✗ Requires tracking token state
- ✗ Memory overhead per user
- ✗ Clock synchronization needed
⭐ Unlock Pro Features
Pro ($29/month):
- ✓ Multi-tier pricing calculator
- ✓ DDoS protection analysis
- ✓ Redis sizing recommendations
- ✓ Cost analysis with graphs
- ✓ Excel export with formulas
Team ($99/month):
- ✓ Everything in Pro
- ✓ Multi-region distribution
- ✓ GraphQL cost analysis
- ✓ Enterprise gateway configs
- ✓ Custom algorithm simulation