Break your APIs in staging, not production
Hammer REST, GraphQL, and WebSocket endpoints with realistic payloads from global regions. Validate every response, measure P95/P99 latency, and catch regressions before release.
Trusted by 2,400+ teams to validate their API performance
Every protocol, one platform
From simple REST health checks to complex GraphQL mutations and persistent WebSocket streams.
REST API
Import Swagger/OpenAPI specs or script requests in Python. Validate status codes, JSON schemas, and response times across every endpoint.
GraphQL
Test queries, mutations, and subscriptions with variable payloads. Measure resolver performance and catch N+1 query regressions under load.
WebSocket
Open thousands of persistent connections, push messages at scale, and measure connection stability and message delivery latency.
From spec to stress test in minutes
Get from API definition to full-scale load test with built-in validation and CI/CD integration.
Import or script your API
Upload an OpenAPI spec, paste a cURL command, or write custom Python scripts. LoadForge builds the test scenario automatically.
Scale concurrent connections
Choose regions, set concurrency from 10 to 1,000,000 virtual users, and define ramp-up patterns that mirror real traffic.
Validate and monitor
Assert on status codes, response bodies, and latency thresholds. Integrate with CI/CD to block deployments that break SLAs.
