Launch with confidence. Test your API before users do.
Launching next week? Test your API under realistic load today. Find critical bottlenecks, verify your infrastructure can handle launch traffic, and fix issues before they become disasters.
Results in 5 minutes • Free tier available
See how your API behaves under realistic traffic
Experience realistic load scenarios instantly. No signup required.
Demo uses JSONPlaceholder by default. Enter any public GET endpoint.
Demo limit: 20 seconds max
The demo uses simplified scenarios. Full tests use AI-generated traffic patterns that mimic real user behavior and production usage.
Full reports include breaking point detection, traffic headroom, bottleneck analysis, and fix recommendations.
Want to test your own APIs? Create a free account →
The pre-launch testing checklist
We automatically test all these scenarios. Check them off your launch prep list in 5 minutes.
Can you handle expected launch traffic?
We simulate your estimated signups and tell you if your system can handle it.
What if you get 10x more traffic than expected?
Spike testing reveals if viral growth will crash your app or scale gracefully.
Where will your system break first?
Database? CPU? Memory? We identify the bottleneck before users hit it.
Are your error messages helpful?
We test error scenarios to ensure users get proper feedback, not 500 errors.
Does your API recover from failures?
Chaos testing injects random failures to verify graceful degradation.
Are response times acceptable under load?
We measure P50, P95, P99 latency to ensure users get fast responses.
What you get from
pre-launch testing
Stop guessing if your API will survive launch day. Get concrete answers about your infrastructure limits, performance bottlenecks, and exactly what to fix before going live.
"Crashes at 150 concurrent users"
"Increase database connection pool to 50"
P50, P95, P99 latency, error rates, throughput
Sleep easy knowing your system can handle it
Don't let this be your launch story
The Product Hunt Crash
Hit #1 on Product Hunt at 9am. API crashed by 9:15am. Database connection pool maxed out at just 50 users. Took 3 hours to fix. Dropped to #8 by then. Lost 500+ potential signups.
Could have been prevented with 5 minutes of testing
The Slow Death
API stayed up during launch but response times went from 200ms to 8 seconds. Users assumed it was broken and left. Issue: Missing database indexes on user queries.
Load testing would have caught this immediately
The Success Story
Tested 2 weeks before launch. Found connection pool, caching, and autoscaling issues. Fixed them all. Launch day: 847 signups, zero downtime, sub-500ms response times throughout.
Pre-launch testing prevents disasters
Launch-ready in 3 steps
Upload your OpenAPI spec
AI analyzes your API and generates realistic launch day traffic patterns.
Run launch simulations
4 test scenarios: baseline, expected traffic, spike, and chaos. Takes 5 minutes.
Fix issues before launch
Get specific recommendations and launch with confidence knowing your limits.
Test before you launch. Sleep easy on launch day.
5 free test runs per month. Get your pre-launch results in 5 minutes. No credit card required.