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.

☕ 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。

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

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

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

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