LAUNCH2025Tunnel your localhost with the CLI, or point a domain straight at any public URL — no install, nothing left running. Then inspect, replay and debug every request that passes through.
A tunnel exists to reach what we cannot. When your target is already public, skip it entirely.
For anything only your machine can reach — localhost, a dev container, a server behind the office firewall.
Point a domain at any public URL from the dashboard. No CLI, no terminal open overnight — it keeps serving whether your laptop is on or not.
Either way you get the same inspector: full request timeline, replay, WebSocket transcripts and AI analysis.
Get a public URL for your localhost in 3 simple steps.
Install the Node.js CLI globally on your machine using npm.
Run the command pointing to your local server port.
Get a public URL instantly and view traffic in our dashboard.
A complete suite of tools for the modern backend engineer.
Get a URL like cool-api.proxylens.dev that forwards to your local port — or straight to any public URL, with no CLI at all.
Capture and replay webhooks from Stripe, Slack, or GitHub without redeploying your code.
Mock responses, inject headers, or simulate errors (500, 404) to test how your app handles failure.
Record a user journey, save it as a "Flow", and replay it with 100x concurrency to stress test your API.
Get instant insights on errors, performance bottlenecks, and security headers using Gemini AI.
Run npx proxylens 3000 in your terminal to inspect traffic without leaving your workflow.