Free high-performance debugger for Windows

See inside every API call.

APIWire intercepts HTTP/S traffic from any app — browser, Node, Docker, Android — in one click. Inspect, mock, and replay. Powered by Rust.

Download APIWire.exe south

~10MB installer · < 1s startup · completely free

GET /api/v1/metrics 200 OK POST /auth/login 201 PUT /settings/profile 204 DEL /session 200
GET /api/v1/metrics 200 OK POST /auth/login 201 PUT /settings/profile 204 DEL /session 200
< 1s
startup
~40MB
RAM at idle
< 5ms
proxy overhead
~10MB
installer
terminal

One click. Any app.

System-wide proxying that just works. Whether it's a Chrome tab, a Go binary, or a Docker container, APIWire hooks in instantly.

Intercept UI
visibility

See exactly what was sent.

Deep inspection for JSON, Protobuf, and GraphQL. Decrypt TLS traffic on the fly with automatic certificate management.

Headers JSON
{
  "id": "usr_4k92",
  "status": "active",
  "meta": { ... }
}
alt_route

Change any response.

Without touching the server. Use our rules engine to mock errors, delay responses, or rewrite body content globally.

smartphone

Your Android apps, debugged.

Connect your physical device or emulator. APIWire automatically configures proxy settings and injects trust stores.

Mobile Debugging

Free forever for everyone.

$0 USD / Monthly

APIWire is committed to remaining a free, open-core tool for the developer community. No subscriptions, no hidden limits, and no credit card required.

check_circle Unlimited HTTP/S capture
check_circle Advanced Rules & Mocking
check_circle Full Android/iOS Support
check_circle TypeScript Scripting Engine
check_circle Modern Rust Architecture
check_circle No-Registration Needed
Download APIWire.exe south

Current version: v2.4.1 (Stable)