Expose Local.
Survive Chaos.
A localhost tunnel with a built-in chaos engine. Inject latency, drop packets, replay webhooks, and mock APIs - without touching your code.
Test Resilience Under Real-World Conditions
Deliberately inject chaos into your tunnel to expose how your app behaves under pressure - before your users find out.
Latency Injection
Simulate slow mobile networks. Add artificial delay (e.g., 3G, 500ms) to every request passing through the tunnel.
Jitter & Packet Loss
Randomize packet arrival or drop connections randomly to test reconnection logic and error handling.
Bandwidth Throttling
Emulate constrained environments by limiting upload/download speeds to test under real-world conditions.
Smart API Mocking
Backend not ready? No problem. Intercept requests and return custom JSON responses instantly without touching your codebase.
Wildcard Subdomain Routing
Run your entire microservice ecosystem locally. EntropyTunnel dynamically routes traffic based on the first DNS label. Spin up ui.your-tunnel and api.your-tunnel simultaneously to perfectly mirror your production environment.
Request Replay & Inspection
Capture every request flowing through your tunnel. Inspect headers, body, response time, and status in real-time. Replay requests with modifications to test edge cases without restarting your app.
How Every Request Flows
Every request flows through a series of intelligent stages, each providing powerful capabilities for development and testing.
Public Internet
External request hits your tunnel URL
MockEngine
Short-circuits with canned responses
ChaosEngine
Injects latency & packet loss
RequestRouter
Resolves target URLs and routes traffic
LocalForwarder
Rebuilds HTTP messages and executes them
Localhost
Your dev server receives the request
Each stage is independently configurable through the
https://entropy-tunnel.xyz/dashboard dashboard or via the command-line interface. Chain together multiple capabilities to create sophisticated testing scenarios.
Control Tower on entropy-tunnel.xyz/dashboard
Every started agent gets a secure cloud dashboard with a generated password. Monitor live traffic, toggle chaos rules, replay failed requests, and manage active and past agents in one place.
https://entropy-tunnel.xyz/dashboard
Navigation
Latency: 500ms
Your Agents
142 requests
https://entropy-tunnel.xyz/dashboard/dashboard/store-api
89 requests
https://entropy-tunnel.xyz/dashboard/dashboard/billing-worker
Recent Requests
Real-Time Monitoring
Watch requests flow through your tunnel in real-time
Instant Configuration
Toggle chaos rules, replay requests, and update settings without restarting
Multi-Agent Discovery
See all your active and historical agents from one cloud dashboard
An Advanced Debugging Suite
Stop guessing. Inspect every request in real time, replay failed webhooks, mock missing APIs, and lock down your tunnel - without touching a single line of code.
Full-body request inspection. Failed webhook? Hit "Replay" to resend the exact payload instantly.
Zero to Chaos in Three Steps
Download a single binary and you are ready. No sign-up, no YAML, no drama.
Download & Run
Launch the single binary. No install, no dependencies, no account. It works with any stack - Node, .NET, Docker, whatever.
Tunnel Opens Instantly
A public HTTPS URL maps to your localhost in seconds. Configure auth rules, IP whitelists, and subdomain routing from the CLI.
Break It. Learn. Ship.
Enable chaos mode to inject latency and packet loss, replay failed webhooks, and mock missing APIs - all without touching your code.
Why EntropyTunnel?
Standard tunnels move bytes. EntropyTunnel helps you build better software.