How do I install the Tunneling skill?

Run npx skillmds@latest add dvcrn/tunneling in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Tunneling safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Tunneling?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Tunneling free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Tunneling?

dvcrn (@dvcrn) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Tunneling by dvcrn — Agent Skill

Name: Tunneling
Rating: 4.5 (4 reviews)
Author: dvcrn

Tunneling

Create free SSH tunnels to expose local ports to the internet using tinyfi.sh. Use when you need to share a locally running app, test webhooks, demo a prototype, or get a public HTTPS URL for any local service — no signup or authentication required.

dvcrn Updated Sep 8, 2026 32 repo stars

File contents

TinyFish Tunneling Service (tinyfi.sh)

Creates instant public HTTPS URLs for locally running apps via SSH tunneling. Free, no account, no installation beyond SSH.

Pre-flight Check (REQUIRED)

Verify SSH is available (it almost always is):

which ssh && echo "SSH available" || echo "SSH not found — install OpenSSH first"

Quick Start

Expose a local port to the internet:

ssh -o StrictHostKeyChecking=accept-new -R 80:localhost:<PORT> tinyfi.sh

Replace <PORT> with the port your app is running on. The command will print a public https://<random>.tinyfi.sh URL.

Custom Subdomain

Request a specific subdomain instead of a random one:

ssh -o StrictHostKeyChecking=accept-new -R myname:80:localhost:<PORT> tinyfi.sh

This gives you https://myname.tinyfi.sh.

Keep-Alive (Stable Connections)

For long-running tunnels, add a keep-alive interval to prevent disconnection:

ssh -o StrictHostKeyChecking=accept-new -o ServerAliveInterval=60 -R 80:localhost:<PORT> tinyfi.sh

Usage Guidelines

When starting a tunnel for the user:

Ask which port to expose if not already specified
Run the SSH command in the background so the agent can continue working
Report the public URL back to the user once the tunnel is established
The tunnel stays open as long as the SSH connection is alive

Common Ports

Framework / Tool	Default Port
Next.js / React / Express	3000
Vite	5173
Django	8000
Flask	5000
Go (net/http)	8080
Ruby on Rails	3000
PHP (built-in)	8000

Rate Limits

5 SSH connections per minute per IP
100 HTTP requests per minute per IP
50 concurrent connections max
48-hour idle timeout

---name: tunnelingdescription: Create free SSH tunnels to expose local ports to the internet using tinyfi.sh. Use when you need to share a locally running app, test webhooks, demo a prototype, or get a public HTTPS URL for any local service — no signup or authentication required.---# TinyFish Tunneling Service (tinyfi.sh)Creates instant public HTTPS URLs for locally running apps via SSH tunneling. Free, no account, no installation beyond SSH.## Pre-flight Check (REQUIRED)Verify SSH is available (it almost always is):```bashwhich ssh && echo "SSH available" || echo "SSH not found — install OpenSSH first"```## Quick StartExpose a local port to the internet:```bashssh -o StrictHostKeyChecking=accept-new -R 80:localhost:<PORT> tinyfi.sh```Replace `<PORT>` with the port your app is running on. The command will print a public `https://<random>.tinyfi.sh` URL.## Custom SubdomainRequest a specific subdomain instead of a random one:```bashssh -o StrictHostKeyChecking=accept-new -R myname:80:localhost:<PORT> tinyfi.sh```This gives you `https://myname.tinyfi.sh`.## Keep-Alive (Stable Connections)For long-running tunnels, add a keep-alive interval to prevent disconnection:```bashssh -o StrictHostKeyChecking=accept-new -o ServerAliveInterval=60 -R 80:localhost:<PORT> tinyfi.sh```## Usage GuidelinesWhen starting a tunnel for the user:1. **Ask which port** to expose if not already specified2. **Run the SSH command** in the background so the agent can continue working3. **Report the public URL** back to the user once the tunnel is established4. The tunnel stays open as long as the SSH connection is alive## Common Ports| Framework / Tool | Default Port ||----------------------|-------------|| Next.js / React / Express | 3000 || Vite | 5173 || Django | 8000 || Flask | 5000 || Go (net/http) | 8080 || Ruby on Rails | 3000 || PHP (built-in) | 8000 |## Rate Limits- 5 SSH connections per minute per IP- 100 HTTP requests per minute per IP- 50 concurrent connections max- 48-hour idle timeout

Frequently asked questions