Test Your App's Resilience

A lightweight proxy that helps you validate how your mobile and web applications handle unreliable backends

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Why Faultend?

See every request and response live. Full visibility into headers, bodies, status codes, and timing.

Click any logged request to instantly convert it into a mock rule. No manual configuration needed.

Route different endpoints to different services. Perfect for microservices architectures.

Simulate latency, errors, and edge cases. Test how your app behaves when things go wrong.

Generate dynamic mock responses with variables, timestamps, UUIDs, and random data.

Save your configurations as JSON files. Share them across teams and environments.

Configure your application to use Faultend as its backend proxy.

https://your-app.faultend.com

Set up rules to route traffic to your real backends or create mock responses.

Rule: /api/* → Proxy to https://api.yourapp.com

Interact with your application as you normally would. All traffic flows through Faultend.

Click any request in the UI to create a mock rule. Adjust status codes, add latency, modify responses.

Mock: 503 Service Unavailable + 5000ms delay

Observe how your app handles errors, retries, timeouts, and degraded states.