Show HN: Port Zero – how I learned to stop worrying and love PORT=0

brew tap PortZeroNetwork/portzero && brew install portzerohow to install Homebrew on macOS# Eliminate port conflicts

Set every port to 0 and start your dev server. Port Zero gives each process or container a stable domain â no port to remember, no EADDRINUSE, ever.

$ PZ_TUNNEL="web.myapp-feat-checkout-redesign.portzero.local" node app.ts $ PZ_TUNNEL="web.myapp-feat-dark-mode.portzero.local" node app.ts
Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431

Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431

Run every branch at once, in git worktrees

Each worktree's dev server gets its own self-explanatory URL â no port juggling between branches, no collisions.

Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431

See it on your phone

Local domains stop at your machine. A cloud tunnel takes the same app to your phone, a tablet, or anyone you choose â HTTPS included.

$ PZ_TUNNEL="nodejs-typescript-process.acme.tunnel.portzero.cloud:80" node app.tsHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431

Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.acme.tunnel.portzero.cloud:80 localhost_port=52431

What do you need?

One tool, six jobs

Port Zero starts local and free, and grows as far as you need. Pick what brings you here â or just explore.

Kill port conflicts for good Stable local domains instead of port numbers.

## Run every branch at once One URL per worktree, however many you spin up.

AI agents and git worktrees each start their own dev server. Every one gets a self-explanatory URL, so N parallel builds never fight over :3000 â and your coding agent can manage it all over MCP.

See the agent workflow â## See it on your phone Local domains stop at your machine. Tunnels don't.

*.portzero.local can't reach a phone or tablet. A cloud tunnel takes the same app across the device boundary with HTTPS â tap the URL on any device and iterate. Works per worktree, too: every branch can get its own cloud URL.

See cloud tunnel plans â## Put a local app on the internet Webhooks, demos, previews â one command, public HTTPS.

## Get it judged by the person who knows A named collaborator uses the real thing and comments in context.

Share a live build with the one person who can tell you it's wrong. They sign in by name, use the actual app, and leave feedback comments right on it â no deploy, no git clone, every iteration.

See plans â## Control what your team exposes Approvals, policies, one flat bill.

Nothing goes public without an approval. Team access policies, shared subdomains, and organization billing â one flat price, no per-seat charges. Audit log available on Enterprise.

See the Team plan âAgent-ready

Ready for agentic coding

Point your coding agent at Port Zero and it handles the tunnel for you â no copy-pasting JSON, no guessing ports.

Easy configuration- One command wires up every AI coding agent it finds on your machine.
MCP- portzero mcpexposes live tunnel and service state as tools an agent can call directly.
Skill- portzero skill installteaches an agent to extract a production topology from your compose file.

See the AI agents doc for the full MCP tool reference, or paste the condensed reference into any agent working in your repo.

Download

Choose the Port Zero CLI installer for your platform.

curl -fsSL https://portzero.net/install.sh | shwhat the install script doesDownload the latest .msi release assetdownload MSI installerPort Zero Local (*.portzero.local tunnels) is free, open-source software under the GNU GPL v3.0. Cloud features are governed by the Terms of Service.

Pricing

Local tunnels are always free and don't require a portzero.cloud account. Paid plans are flat â no meters, no overages, no per-seat charges.

Free and Open Source

Free forever

Unlimited local tunnels, open source
Cloud tunnels on paid plans
Community support

Professional

$49/mo

or $490/yr billed yearly

Everything in Free, plus:

Unlimited cloud tunnels
Generous cloud bandwidth & requests*
Visitor auth & access control
Feedback comments on live tunnels

Team

$149/mo

or $1,490/yr billed yearly

Everything in Professional, plus:

Unlimited members â no per-seat charges
Teams & member invites
Shared team subdomains
Team naming & access policies
Cloud-tunnel approvals
Organization billing

Enterprise

Custom

Everything in Team, plus:

Audit log
Custom terms & higher limits
Security-review support
Dedicated onboarding

Compare all features

| Features | Free and Open Source | Professional | Team | Enterprise |
|---|---|---|---|---|
| Price | $0 | $49/mo | $149/mo | Custom |
| Tunnels & usage | ||||
| Local tunnels | Unlimited | Unlimited | Unlimited | Unlimited |
| Cloud tunnels | 0 | Unlimited | Unlimited | Unlimited |
| Cloud requests / month | 0 | Fair use | Fair use | Fair use |
| Cloud bandwidth / month | 0 | Fair use | Fair use | Fair use |
| Access & sharing | ||||
| Tunnel visitor auth & access control | â | |||
| Feedback comments | â | |||
| Usage metrics | â | |||
| Priority support | â | |||
| Teams & governance | ||||
| Team members (flat, no per-seat) | 0 | 0 | Unlimited | Unlimited |
| Teams & member invites | â | â | ||
| Team subdomains | â | â | ||
| Team naming policies | â | â | ||
| GitHub-OIDC CI credentials | â | â | ||
| Team tunnel access policies | â | â | ||
| Cloud-tunnel approvals | â | â | ||
| Organization billing | â | â | ||
| Audit log | â | â | â | |

Cloud bandwidth and requests are generous and subject to fair use â see our Terms of Service.