In-process capture
A native OkHttp interceptor on Android and URLProtocol on iOS, with a JS fetch / XHR / WebSocket fallback where native cannot see traffic. No proxy. No CA certificate.
Hakka
Open SourceReact Native · Web · Native
See every request
from inside your app.
Local-first network inspector for React Native, the web, Next.js, Android, and iOS. It captures traffic in-process, with no proxy, no certificate, no cloud, and no accounts.
$
npx hakka init
A full inspector, in-process.
Breakpoints
Pause and edit a request or a response while it is in flight, then resume or abort. The Charles and Proxyman trick, in-process, with nothing sitting in the middle.
Mocking & throttling
Canned responses, block an endpoint, Map Remote redirect, rewrite, and network-condition profiles. Test the unhappy path on demand.
Exports
One capture, four formats: HAR, OpenTelemetry, Postman Collection, and shell-safe cURL. Hand it to a teammate or replay it later.
MCP for AI agents
Point Claude Code at your live traffic and ask "what 5xx did that button trigger?" against the real requests your app just made. Sensitive headers are redacted at ingest.
Release-safe
Production builds get no-op artifacts, so there is zero overhead in the app you actually ship. Hakka runs in dev and disappears in release.
Same model everywhere. Native rendering.
hakka-core powers every target, so captures, panels, and exports stay identical across platforms while each surface renders native.
React NativeWebNext.jsAndroidiOS
Two lines in React Native.
Or run npx hakka init to detect your framework and wire it up.
npm install react-native-hakka \
@react-native-clipboard/clipboard
cd ios && pod installimport { Hakka } from 'react-native-hakka'
Hakka.start({ mode: 'auto' })