Powered by OpenAPI / Swagger

Already have an OpenAPI spec? Get load testing for free

Your OpenAPI spec contains everything we need to generate realistic load tests. Upload it, and our AI creates traffic scenarios that test every endpoint automatically. No manual scripting.

Works with OpenAPI 3.0+ and Swagger 2.0

Upload spec
YAML or JSON format
AI generates
Realistic test scenarios
5 minutes
To full results
Try it now

See how your API behaves under realistic traffic

Experience realistic load scenarios instantly. No signup required.

Sandbox Mode

Demo uses JSONPlaceholder by default. Enter any public GET endpoint.

10 RPS
5Demo limit: 5050

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 →

Spec-Driven Testing

Everything we learn
from your OpenAPI spec

Your OpenAPI spec is a goldmine of information. We extract endpoints, parameters, schemas, authentication methods, and response formats to generate comprehensive, realistic load tests automatically.

Works with OpenAPI 3.0+, Swagger 2.0, and auto-generated specs from FastAPI, NestJS, Spring Boot, and more.

All endpoints & methods

GET, POST, PUT, DELETE — we test them all

Request/response schemas

AI generates valid payloads automatically

Authentication flows

API keys, Bearer tokens, OAuth — all supported

Endpoint relationships

Realistic user journeys (create → get → update → delete)

Your OpenAPI Spec

openapi.yaml
paths:
/users:
post:
summary: Create user
get:
summary: List users
/users/{id}:
get:
summary: Get user
put:
summary: Update user

AI-Generated Test Scenarios

Scenario 1: User CRUD flow
1. POST /users → create
2. GET /users/{id} → verify
3. PUT /users/{id} → update
4. GET /users → list
Scenario 2: Bulk operations
1. POST /users (×10) → batch create
2. GET /users → paginate
3. GET /users/{id} (random) → read
Scenario 3: Error handling
1. GET /users/invalid → 404
2. POST /users (bad data) → 400
3. PUT /users/999 → 404

Works with any framework that generates OpenAPI specs

FastAPI
Built-in OpenAPI
NestJS
@nestjs/swagger
Spring Boot
springdoc-openapi
Express
swagger-jsdoc
Django
drf-spectacular
ASP.NET
Swashbuckle
Rails
rswag
Flask
flask-swagger-ui

From spec to insights in 3 steps

01

Upload your OpenAPI spec (YAML or JSON)

We parse your spec to understand endpoints, schemas, auth, and relationships.

02

AI generates realistic test scenarios

User journeys, traffic patterns, valid payloads — all automated from your spec.

03

Run 4 test types automatically

Baseline, ramp, spike, and chaos testing. Get results with specific performance insights.

Turn your OpenAPI spec into load tests in 5 minutes

Free tier includes 5 test runs per month. No credit card required. Upload your spec and test your API today.