debugging-proxy

Open-source native macOS HTTP debugging proxy — intercept HTTPS, inspect APIs, mock responses, debug WebSocket & GraphQL. Community-driven. For developers, by developers.

MCP server enabling agents to debug HTTP requests better (using powhttp)

Free, open-source HTTP, HTTPS and WebSocket debugging proxy for Windows and macOS. Rust core + Electron UI. Alternative to Charles, Proxyman and Fiddler.

Free, open-source Fiddler Classic alternative for Windows. Capture, inspect, filter, replay, compose and mock HTTP/HTTPS traffic with TLS decryption, HTTP/2, HTTP/3 and SAZ support.

A modern Fiddler Classic alternative for macOS. A Fiddler clone for Mac: capture and inspect HTTP/HTTPS traffic, and replay HAR files with an AutoResponder.

Wirepane: an HTTPS debugging proxy inside Claude Code (Proxyman/Charles alternative). Intercepts and decrypts traffic from your browser, iOS Simulator, iPhone and Android, lists and filters every request, and lets Claude read them.

HTTP(S) debugging proxy for macOS, Windows and Linux: capture, inspect, mock, break and replay traffic, diagnose what slows it down, and see what AI agents like Claude Code and Codex do — LLM calls, tokens and costs, MCP tool calls, prompt cache. A modern Fiddler alternative.

Cross-platform HTTP/HTTPS/WebSocket debugging proxy GUI powered by whistle, built with Electron and React.

Sekisho 関所 · a native macOS HTTP(S) debugging proxy on SwiftNIO: SSL Proxying with its own CA, breakpoints, Map Local and Remote, scripting, per-app traffic.

Free, open-source native macOS HTTP/HTTPS debugging proxy (Proxyman / Charles / Fiddler alternative) with rules, breakpoints, Map Local and a built-in MCP server for AI. 免费开源的 Mac 抓包工具。

Local HTTP/HTTPS debugging proxy that understands LLM API traffic (OpenAI, Anthropic, Gemini, Copilot): token usage, cost, streaming reconstruction. Sessions saved as plain JSON so coding agents can read them.

Intercepting forward proxy library for Go that supports HTTP/1.1, HTTP/2, HTTP/3, gRPC, WebSocket, TCP, QUIC and UDP, in explicit, transparent and SOCKS5 modes.

MCP-powered debugging proxy: let AI agents inspect, search and rewrite your app's HTTP(S) & WebSocket traffic. Web UI, CLI and TUI in a single Go binary.

Mouchard releases: download the latest DMG

Debugging proxy made for web developers

A native macOS debugging proxy for HTTP, HTTPS and WebSocket traffic, built in Go with MyGo.

Open-source HTTP & HTTPS debugging proxy for macOS, Windows and Linux. Inspect traffic, mock APIs, run API tests, decode gRPC. Built with Rust.

Scripts to help with debugging apps (especially iOS apps) using OWAZP ZAP

Dev Proxy — independent third-party profile of a public API surface, by API Evangelist. Dev Proxy is a Microsoft command-line tool for simulating, testing, and debugging API interactions during development.

Proxyman — independent third-party profile of a public API surface, by API Evangelist. Proxyman is a modern, native macOS app for HTTP/HTTPS debugging proxy with advanced features for API development and testing.