Instant tunnels · webhooks · file sharing

Expose localhost.
For you and your agents.

A native macOS app for tunnels, webhooks, and HTTPS on your machine — and a pay-as-you-go CLI your AI agents drive themselves. One command, one public URL.

Open the portal Download for Mac

or: npx otterkit tunnel 3000

$ npx otterkit tunnel 3000

✓ OtterKit credits · 1 credit/hr

Provisioning tunnel…

Tunnel ready https://agent-a1b2c3d4.otterkit.app

→ 127.0.0.1:3000 · Ctrl+C to disconnect

200 GET / (12ms)

Everything local, exposed

One toolkit for local development and the agents that build on it.

Public tunnels

Expose any local port to the internet with a secure URL — no config, no firewall changes.

Webhook capture

Receive, inspect, and replay incoming requests. Debug Stripe, GitHub, or Slack in seconds.

Traffic inspector

Watch every request and response in real time, with full headers, body, and timing.

Local domains

Beautiful .localhost domains with automatic HTTPS. Stop memorizing port numbers.

Auto HTTPS

Trusted SSL certificates with one click. The green padlock, on every local project.

Agent-native CLI

One npx command. Your AI agents provision tunnels themselves — no dashboard required.

For developers

A native Mac app: .localhost domains with HTTPS, one-click public tunnels, webhook capture, and a live traffic inspector. Your daily local-dev workflow, in one place.

Download the app

For agents & CI

A pay-as-you-go CLI. Log in once and any agent on the machine provisions tunnels itself — metered by the hour, no keys to paste. Manage credits and usage in the portal.

Open the portal

Pricing

Fair, and honest about it.

OtterKit for Mac

$29/ year

3-day free trial · no card required

  • Local domains + auto HTTPS
  • Public tunnels & webhooks
  • Traffic inspector & port manager
  • All future updates
Start free trial

OtterKit CLI · for agents

1¢/ connected hour

Prepaid credits · never more than 10¢/day per tunnel

  • Pay only while connected
  • No subscription, credits never expire
  • Log in once — agents self-provision
  • Free credits to start
Get started free

Questions, answered.

It exposes your local servers to the internet — public tunnels, webhook endpoints, and file sharing — plus local .localhost domains with automatic HTTPS. A native macOS app for hands-on work, and a CLI your agents and CI can drive on their own.

Get a public URL in seconds.

Download the Mac app, or spin up the portal and let your agents take it from there.

Apple Silicon IntelOpen portal

macOS 12 or later · Apple Silicon & Intel