HTTP Sniffer Pro

HTTP Sniffer Pro is the paid Google Play edition of HTTP Sniffer. It removes advertising SDKs, in-app purchase prompts, and subscription UI while keeping the same professional network capture, mock, replay, traffic redirect, and webhook workflow.

This is a professional-grade network packet capture and debugging tool for mobile developers and testers, providing comprehensive real-time traffic monitoring, multi-protocol analysis, and debugging capabilities for Android apps.

### Core Capabilities
- Multi-Protocol Capture: Real-time capture and analysis of HTTP/HTTPS, WebSocket (WS/WSS), DNS, SSE, gRPC (Unary/Stream), and MQTT protocols.
- Analysis by Application: Filters and analyzes network traffic by application to quickly locate the source of problems.
- HTTPS Decryption: Provides SSL/TLS certificate management and import, and supports encrypted traffic decryption analysis.
- Traffic Redirect: Redirect all captured TCP/UDP connections to a specified server for remote debugging and traffic inspection.
- HTTP Webhook: Forward captured packets to custom POST endpoints for integration with external tools and monitoring systems.
- Request Simulation (Mock): Configurable rules allow for HTTP mocking, facilitating both online and offline debugging.
- Modify and Replay: Supports editing requests and responses after interception, and replays to verify the effectiveness of repairs.

### Why Use VPNService
Apps use Android's VPNService to implement system-level network data channels, enabling the following capabilities:
- Network Interception: Intercepts network requests and responses from other apps on the device using VPN technology.
- Packet Analysis: Analyze HTTP, WebSocket, gRPC, DNS, and MQTT traffic in real time, extracting and displaying key fields and data.
- Network Debugging: Provides request path tracing, performance observation, and problem location tools to assist in development and debugging.
- Packet Rewriting: Modifies intercepted requests, injects rules, and resends them to verify remediation solutions.

### Compliance and Transparency Statement
- User Perception: Continuously displays the VPN service status in the notification bar to ensure users are fully informed.
- Permission Transparency: Clearly explain the reason and purpose of VPN permissions during the authorization and onboarding process.
- Functional Necessity: VPNService is a necessary technical means for system-level network interception and analysis.
- Security Boundary: Used only for network debugging and analysis in development and testing scenarios. Captured traffic stays on device unless you export or share it; limited diagnostics, app/package signals, and device identifiers may be processed by Google services after consent as disclosed in the privacy policy.
- HTTPS Compliance: HTTPS decryption is only performed after the user has actively installed a trusted certificate and explicitly authorized it. Certificate management is fully controllable and removable.

### Applicable Scenarios
- Development debugging, API verification, problem reproduction and location
- WebSocket/gRPC/SSE real-time communication debugging
- DNS resolution analysis and MQTT IoT protocol inspection
- Traffic redirect to PC for advanced debugging with Wireshark, Charles, etc.
- Webhook integration for automated monitoring and alerting
- Third-party SDK/embedded WebView network behavior analysis
- Rapidly construct and verify mock scenarios