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-first observability and API debugging for TypeScript. Live traces, contextual logs, schema-aware testing, and OTLP export for Elysia, Express, Fastify, Hono, and Next.js.

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.

OpenAI-compatible AI API gateway guide: model checks, Codex troubleshooting, credit card & crypto payments｜AI API中转接入与排错

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 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

Chrome extension: TraceAPI is a browser extention for inspecting API requests, viewing JSON responses, generating go structs, and copying cURL or payloads without opening DevTools

Charles Proxy is an HTTP proxy and HTTP monitor that enables developers to view all HTTP and SSL/HTTPS traffic between their machine and the Internet, including requests, responses, and HTTP headers.

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