Overview

MinPin is a native macOS proxy debugger for capturing, inspecting, and modifying network traffic.

MinPin sits between the apps on your Mac and the internet as a local HTTP/HTTPS proxy. It captures every request and response, decrypts HTTPS for the hosts you opt in, and lets you inspect, modify, replay, and export that traffic — all in a fast, native Swift + AppKit app.

What you can do

• Capture HTTP/1.1, HTTP/2, WebSocket, gRPC, GraphQL, and Protobuf from any app.
• Decrypt HTTPS per host with a locally-generated root CA.
• Modify traffic with breakpoints, rewrite rules, Map Local/Remote, throttling, and DNS spoofing.
• Replay requests (Compose, Repeat, Batch Repeat) and export to HAR/CSV/code.
• Automate with JavaScript scripts and a local MCP server for AI assistants.
• Scan traffic for leaked secrets and PII with Security Mode.

Free vs PRO

The free tier includes the full capture pipeline, SSL decoding, filtering, search, and pinning, with 30-minute capture sessions. PRO removes the session limit and unlocks the modification & automation suite (breakpoints, rewrite rules, Compose, Security Mode, MCP). See License & Activation.