Intercept and inspect Coding Agent API traffic from Claude Code, Codex CLI, Gemini CLI, Cursor CLI, OpenCode, Kimi, 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.

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

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.

Parse and analyze HTTP Archive (HAR) files via MCP

🤖 Javascript (AI) 🚀 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。

A lightweight CLI HTTP debugging proxy written in Go, designed for developers to inspect, filter, and log HTTP/HTTPS traffic directly from the terminal.

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

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

AI-powered tool to analyze and debug API errors instantly

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

API platform info for api-clients

VS Code extension to replay and compare HTTP API requests from raw text, curl, logs, HAR, and .indus.http files.

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

Fiddler by Telerik (Progress Software) is a suite of HTTP debugging proxy tools for capturing, inspecting, modifying, and replaying HTTP and HTTPS traffic between computers.