How to find API endpoints inside an APK
Where to look first: resources, DEX strings, native libraries and runtime traffic.
Research
Android reverse engineering guides
Field notes on Android request flows, protected APKs, native code and callable API reconstruction.
API Discovery
Read
Request Reconstruction
Why a captured Android request fails in Python
The capture is a freeze-frame. The fix is rebuilding the generation, not the copy.
Encryption
Reverse engineering encrypted Android request bodies
Separate encoding, compression, serialization and encryption before you reproduce the bytes.
Authentication
Reconstructing token generation from an APK
Follow the token backward through storage and the response parser to its source.
Native Code
Following request logic into JNI
An empty Java method is a handoff. The logic moved into the .so, and so does the analysis.
Protection
Understanding runtime-loaded DEX
Runtime-loaded DEX is invisible statically; dump the live classes to analyse the real code.
Protection
Understanding libpairipcore.so
PairIP ships libpairipcore.so and a license stub; the guard changes the environment, not the protocol.
Frameworks
Finding API logic inside a Flutter APK
Dart is AOT-compiled into libapp.so; observe the flow and trace the platform channels.
Frameworks
Reverse engineering React Native API requests
The request code is in the bundle; Hermes changes how you read it.
DRM & Media
How ExoPlayer uses Android MediaDrm
ExoPlayer drives the network; MediaDrm is the DRM underneath. Separate them to locate a failure.
Every research article
160 articles on reproducing Android app behaviour, covering request signing, protection, frameworks, transports and licensed media.
API documentation
App protection
Application shielding
Attestation
Authentication
Authorisation tracing
Base URL recovery
Binary protocols
Build optimization
Certificate pinning
Class encryption
Client construction
Client design
Collection building
Cost and scope
Crash diagnosis
Decompiler output
Device binding
Dex analysis
Direct automation
Distribution controls
DRM and media
Encrypted payloads
Endpoint discovery
Engagement scope
Failure diagnosis
Flutter analysis
Flutter internals
Flutter packaging
Flutter payloads
gRPC over HTTP/2
Hermes bytecode
Instrumentation
JNI analysis
Legacy recovery
Licence acquisition
Licence requests
Media3 DRM
Method
Native analysis
Native Android
OAuth tracing
Obfuscation analysis
OkHttp internals
Packed builds
Payload encryption
Payload reconstruction
Player network flows
Private APIs
Protected builds
- Inside a PairIP VM interpreter
- Instrumenting a release build that resists debugging
- PairIP: what breaks, what it costs, who fixes it
- Reading OAT, VDEX and compact DEX files
- When an AppDome instrumentation check blocks your automation
- When the backend verifies device integrity
- Working with obfuscated native code in Android libraries
Protection detection
Proxy diagnostics
Python clients
Python reproduction
Query recovery
React Native
React Native analysis
Replay diagnosis
Request replay
Request reproduction
Request signing
- Canonicalising a request body before signing
- Finding a signing key that is not stored in the APK
- Handling a signing key that rotates
- How timestamps and nonces break Android API replay
- How to trace an Android request signature
- Identifying the signature header in a captured request
- Rebuilding a timestamp and nonce scheme from an app
- Reconstructing token generation from an APK
- Recovering an HMAC scheme from an Android app
- Reproducing an app's request signature in Python
- Reverse engineering encrypted Android request bodies
- Signing a multipart or file upload request
- Sorting and encoding rules in a signed query string
- Tracing Android request signing into JNI
- Why header order changes a request signature
Retrofit extraction
Runtime checks
Runtime code loading
Scope
Scope and limits
Scope and pricing
Session reconstruction
Session state
Shrinking and keep rules
Signature integrity
Signature reproduction
Streaming transport
String encryption
Third-party SDKs
Token handling
Traffic analysis
Traffic interception
Traffic monitoring
Transport identity
Transports
Xamarin
Xamarin and .NET MAUI
One full APK. One complete delivery.
Projects start at $120. Most are delivered in 24 to 72 hours.
Every format included
Python, JavaScript/TypeScript, Postman and complete API documentation cover the same full endpoint set. Your team runs the clients in its own server or system.
Ready in 24–72 hours
The delivery window starts after we receive the APK and any account access needed to run it. The fixed quote states the deadline. Most projects finish sooner.
Deployment checked before the quote
The package includes signing, encryption, decryption and session handling. We verify device-bound keys and server integrity checks during review and document runtime requirements before you commit.
30 days of fixes
Report a defect within 30 days of delivery. We fix any delivered call that does not match the tested APK at no extra cost.