api-debugging

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.

Educational HTTPS traffic inspector in Go—run curl, AWS CLI, Node, or Python commands through a local MITM proxy to log decrypted requests, responses, headers, and bodies.

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.

Local Claude Code HTTP traffic inspector with a desktop GUI and agent API. Capture prompts, tools, SSE, errors, and tokens.

Online LLM API gateway quality checks | protocol, token usage, SSE, tool calls, routing and production diagnostics

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.

Local multi-protocol LLM API tester for OpenAI-compatible, Anthropic & Gemini endpoints · 本地多协议 API 测活工具

☕ 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。

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

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

A lightweight local route manager for frontend developers — bringing Nginx-level routing to your desktop. Intercept, mock, and rewrite HTTP/HTTPS/WebSocket traffic from any client with visual rules.