API Lens – Smart HTTP Inspector

Real-time HTTP monitoring with analytics, performance scoring, replay functionality, and API insights for developers.

API Lens – Smart HTTP Inspector for Developers API Lens gives developers a clear, real-time view of every HTTP & HTTPS request a webpage makes. Built for API debugging, performance analysis, and modern microservice workflows, API Lens turns complex network traffic into actionable insights through a clean, intuitive UI. Whether you’re working on frontend apps, backend APIs, or microservices, API Lens helps you identify slow endpoints, retry storms, authentication issues, and noisy requests instantly—without switching tools. Everything runs locally in your browser. ✅ No tracking ✅ No external servers ✅ No data sharing 🚀 Core Features 🔍 Real-Time Network Inspection Live capture of HTTP & HTTPS requests Instant visibility into GET, POST, PUT, DELETE calls ⚙️ Advanced Filtering Filter by 2xx, 3xx, 4xx, 5xx Dedicated views for: Slow APIs Retries Noisy endpoints ⏱️ Performance & Latency Insights Timing breakdowns Visual endpoint heatmap Color-coded latency indicators 🔁 Retry & Stability Detection Automatically detects repeated retries Helps identify unstable or misconfigured APIs 🔐 Authentication & Security Insights (NEW 🔥) Detect missing Authorization headers Identify JWT / API-Key issues Warns when CSRF tokens are missing Highlights low-trust endpoints 🧹 Smart Noise Detection (NEW 🔥) Automatically flags noisy or irrelevant requests One-click Ignore Noise mode Focus only on important API traffic 🧪 Request Replay Replay API calls instantly Test backend behavior without leaving the browser 📦 Full Request Details Headers Payloads Query parameters Response data 📤 Export & Save Export captured requests as JSON Bookmark important API calls using local storage 🎨 Modern Developer-Friendly UI Dark mode Glass mode Clean, distraction-free layout 🧠 Why Developers Choose API Lens ✔ Debug API failures faster ✔ Understand frontend ↔ backend communication ✔ Detect slow or retrying APIs early ✔ Inspect authentication flows with clarity ✔ Reduce debugging time in microservice systems API Lens is designed to simplify network debugging without overwhelming developers. 🛠️ How It Works Install API Lens – Smart HTTP Inspector Click the API Lens icon and attach it to the active tab Browse normally—requests are captured automatically Filter, inspect, replay, or export anytime