Intercept and inspect Coding Agent API traffic from Claude Code, Codex CLI, Gemini CLI, Cursor CLI, OpenCode, Kimi/Kimi Code, Pi, and Hermes in a local trace viewer.

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

JSON formatter • JSON prettifier • JSON beautifier desktop app. Format messy JSON files instantly. Free JSON viewer and organizer for Windows, macOS, Linux.

Fiddler Everywhere — cross-platform HTTP/S debugging with traffic capture, breakpoints and API inspection.

🔄 A Django middleware to record, track, persist, and replay API requests - enabling state restoration and precise debugging in volatile or reset-prone systems.

Local HTTPS proxy & mobile web debugging — param transform, Mock, built-in debug panels. Windows.

charles proxy download — Charles Proxy for Windows 11 & 10. Direct download, install steps and setup guide.

Chrome extension (Manifest V3) that captures every network request on any tab — full URLs, headers, cookies, query params, POST bodies, response headers, Set-Cookie, response bodies (text + binary) — and exports the whole session as ZIP, JSON, HAR or CSV in one click. Zero dependencies, 100% local, no telemetry.

A Python library for logging and comparing request-response data to identify differences in headers and payloads between identical endpoints.

Compares API requests to detect failure patterns and surface likely causes with confidence scoring.

☕ Javascript 🚀 APIForge is a browser-based HTTP request tool built as a single self-contained HTML file — no server, no login, no activity logging, no backend.

API request/response tracker & JWT decoder extension for Chrome in TypeScript/React. API logs → JWT payload & cURL conversion, MIT Licensed, fully open source. / Chrome用APIトラッカー＆JWTデコーダー拡張機能。MIT License、完全オープンソース。

OpenAI Compatible API生产排错：API Doctor、401/429/5xx、重试、SSE与显式回退

A dedicated SQL query profiler for Laravel APIs. Monitor, log, and analyze database performance for every API endpoint with a built-in dashboard.

Online HTTP status code lookup tool for API debugging and web troubleshooting.

explain any HTTP status code or header in one command. cited to the RFC.

AI-powered tool to analyze and debug API errors instantly

API platform info for api-clients

End-to-end debugging of authentication and onboarding failures in a multi-service web app (OAuth, session handling, API & proxy issues)

AI-powered API debugging tool that analyzes HTTP errors and provides structured insights, possible causes, and suggested fixes. Built with FastAPI and LLM integration.