Public Tunnel
Create temporary public tunnels to expose local application ports for demos or sharing work in progress. Use when the user asks to share a local app, create a public URL for a port, set up a tunnel, or make a local server temporarily accessible from the internet.
Install
$ agentstack add skill-sinedied-agent-skills-public-tunnel ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-sinedied-agent-skills-public-tunnel) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Public Tunnel (tunnelmole)
Create temporary public URLs that forward to local application ports using tunnelmole. No account needed, no password — just a clean public URL.
Usage
When a user asks to expose a local port or create a public URL for a running application:
- Confirm the local port number (must be > 1024 for security)
- Start a tunnel using
npx tunnelmoleas a background process - Parse the generated
*.tunnelmole.netURL from the output - Report the public URL back to the user
Important Rules
- Port restriction: Only expose ports > 1024. Refuse to tunnel privileged ports (0-1024) to prevent exposing sensitive services.
- Single tunnel per port: Don't create duplicate tunnels for the same port.
- No password needed: Tunnelmole URLs are directly accessible — no IP/password prompt.
Example
User: "Create a tunnel for my app on port 5173"
- Start the tunnel as a background process
- Read the output to get the
*.tunnelmole.netURL - Send the user the URL
Response example: > Your app is now publicly accessible at: https://f38fg.tunnelmole.net > The tunnel will automatically close in 15 minutes.
Implementation Notes
Run tunnelmole via npx as a detached background process. The URL appears in stdout after a few seconds.
# Start tunnel (run as detached background process)
npx -y tunnelmole The output contains a line like:
https://f38fg.tunnelmole.net is forwarding to localhost:5173Parse the https://*.tunnelmole.net URL from the output.
To close the tunnel, kill the tunnelmole process for the corresponding port.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: sinedied
- Source: sinedied/agent-skills
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.