Moni Proxy: HTTP Debugger

Moni Proxy is an on-device HTTP debugger, HTTPS sniffer and packet capture tool for Android. Intercept, inspect and decrypt HTTP/HTTPS traffic from any app, mock endpoints, rewrite requests, set breakpoints and replay calls — directly on your phone. No root, no computer, no USB cable. Debug network traffic without switching to a desktop. Whether you're building an app, testing APIs, investigating an unexpected response or reproducing a network bug on a real device, Moni Proxy gives you the whole toolkit in one place.

CAPTURE HTTP & HTTPS TRAFFIC

A local VPN works as a packet sniffer for every app on the phone, on Wi-Fi or mobile data. HTTPS is decrypted on-device with a certificate you install once, so you read the real request and response — not just a hostname.

Inspect:
• URLs and query parameters
• Request and response headers
• Request and response bodies, with a JSON viewer
• HTTP methods, status codes and content types
• Request timing and network errors
• WebSocket frames

Search and filter captured traffic by host, method, status or keyword to find the request you need in seconds.

INSPECT REQUESTS & RESPONSES

Open any captured request to see the complete exchange: headers, parameters, payloads, JSON responses, status and timing in one focused screen. Spot wrong parameters, unexpected responses, authentication problems and API errors without leaving your phone.

MOCK API RESPONSES (MAP LOCAL)

Test scenarios without touching the backend. Map Local replaces a server response with your own file, JSON or status code, with an optional delay to simulate a slow API.

Test:
• Empty states and error responses
• Alternative JSON payloads
• Edge cases and different API states

REWRITE NETWORK TRAFFIC

Create Rewrite rules to modify requests and responses in flight — headers, query parameters, request data, response data — and reproduce scenarios that are otherwise hard to trigger.

BREAKPOINTS

Pause a request or response before it continues. Inspect it, edit parameters, headers or body, then let it through. The same workflow you know from desktop proxies, on Android.

REPLAY & COMPOSE REQUESTS

Replay any captured request without repeating the flow in the original app. Change a value, send it again, compare results. Compose new requests from scratch.

GENERATE cURL & CODE

Turn a captured request into a cURL command or client code in Dart, Swift, Kotlin or TypeScript, ready to paste into your project or share with a backend teammate.

EXPORT SESSIONS

Export traffic as HAR for analysis in other tools, or share a session with developers, QA, backend or support teams.

BUILT-IN DEVELOPER TOOLBOX

JSON formatter, Base64, URL encoder, hash, JWT decoder, QR generator, timestamp converter and regex tester — so you don't need a second app.

PRIVACY FIRST

All captured traffic stays on your device. Nothing is uploaded to our servers. Lock the app behind biometrics if you share the phone.

WHO IT'S FOR

If you've used Charles, Proxyman, Fiddler, mitmproxy or HttpCanary on desktop and want the same packet capture and HTTPS interception workflow on your Android phone, Moni Proxy is built for that. Made for mobile developers, backend developers, QA engineers, API developers, testers and security researchers.

FREE TO START

Capture unlimited traffic, use the full inspector, generate code in all four languages and run the entire toolbox for free. Pro removes the limits on decrypted hosts, Map Local, Rewrite and Breakpoint rules, and adds JavaScript scripting and the AI script assistant.

Capture traffic. Inspect APIs. Mock responses. Rewrite requests. Replay calls. Turn your Android device into a complete HTTP and API debugging environment with Moni Proxy.