Chaos & Resilience
Network Chaos & Latency Simulator
Test UI skeleton loaders, error toast alerts, debounce handlers, and optimistic rollbacks by injecting configurable network delays, HTTP error codes, and flaky jitter into any REST query.
Chaos Engineering & Fault Injection Pipeline
Fault Injection
Click to expand full architecture
Runtime resilience testing: Intercept incoming requests to inject artificial delays, forced HTTP error codes, and flaky jitter without mock code changes.
1Query Modifiers
Request Modifiers
Attach query parameters (_delay=2000, _status=500, _flaky=true) to any API call.
2Middleware
Chaos Middleware
Injects artificial latency timers (0-5000ms), error overrides, and jitter randomizers.
3UX Resilience
Frontend UX Resilience
Validate skeleton loading animations, toast error messages, and retry backoff UX.
Interactive Chaos Playground
Configure modifiers and click "Trigger Request" to test real-world network edge cases:
0ms2.5s5.0s
https://playground.nileslabs.com/api/v1/posts?_delay=1500&_limit=3
Supported Chaos Modifiers
| Modifier Type | Query Param | HTTP Header Alternative | Description |
|---|---|---|---|
| Latency Delay | ?_delay=1500 | X-Simulate-Delay: 1500 | Sleeps on the server for 0-5000 milliseconds before sending headers. |
| Status Override | ?_status=500 | X-Simulate-Status: 500 | Forces response code to 400, 401, 403, 404, 429, 500, or 503. |
| Random Flakiness | ?_flaky=true | X-Simulate-Flaky: true | Injects randomized latency (200-2500ms) and random 10% packet drops. |
Need to test specific error codes?
Simulate 400 Bad Request, 404 Not Found, 429 Rate Limits, or 500 Server Crashes.