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

# Port Zero — stable domains for your local dev ports Source: [https://portzero.net/](https://portzero.net/) Developer networking, without port conflicts ## Eliminateport conflicts Set every port to`0`and start your dev server\. Port Zero gives each process or container a stable domain — no port to remember, no`EADDRINUSE`, ever\. bash ``` $ PZ_TUNNEL="web.myapp-feat-checkout-redesign.portzero.local" node app.ts $ PZ_TUNNEL="web.myapp-feat-dark-mode.portzero.local" node app.ts ``` web\.myapp\-feat\-checkout\-redesign\.portzero\.local git worktree feat/checkout\-redesign ``` Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431 ``` web\.myapp\-feat\-dark\-mode\.portzero\.local git worktree feat/dark\-mode ``` Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431 ``` One machine, many branches ## Run every branch at once, in git worktrees Each worktree's dev server gets its own self\-explanatory URL — no port juggling between branches, no collisions\. bash ``` $ PZ_TUNNEL="web.myapp-feat-checkout-redesign.portzero.local" node app.ts $ PZ_TUNNEL="web.myapp-feat-dark-mode.portzero.local" node app.ts ``` web\.myapp\-feat\-checkout\-redesign\.portzero\.local git worktree feat/checkout\-redesign ``` Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431 ``` web\.myapp\-feat\-dark\-mode\.portzero\.local git worktree feat/dark\-mode ``` Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431 ``` Beyond your machine ## 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 — HTTPS included\. bash ``` $ PZ_TUNNEL="nodejs-typescript-process.acme.tunnel.portzero.cloud:80" node app.ts ``` nodejs\-typescript\-process\.portzero\.local ``` Hello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431 ``` nodejs\-typescript\-process\.acme\.tunnel\.portzero\.cloud ``` 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 — or just explore\. What brings you here? **Kill port conflicts for good**Stable local domains instead of port numbers\.Set every port to 0\. Each process and container gets a stable \*\.portzero\.local domain — no EADDRINUSE, no port map, no bookkeeping\. Free and open source\. [Download Port Zero →](https://portzero.net/#download) **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 — and your coding agent can manage it all over MCP\. [See the agent workflow →](https://portzero.net/docs/ai-agents) **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 — tap the URL on any device and iterate\. Works per worktree, too: every branch can get its own cloud URL\. [See cloud tunnel plans →](https://portzero.net/#pricing) **Put a local app on the internet**Webhooks, demos, previews — one command, public HTTPS\.Give any local app a public HTTPS URL — on your own domain if you like\. Flat pricing: no metered bandwidth, no per\-request pricing, no overage charges\. [Cloud bandwidth is generous and fair\-use\.](https://portzero.net/terms#fair-use) [Compare plans →](https://portzero.net/#pricing) **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 — no deploy, no git clone, every iteration\. [See plans →](https://portzero.net/#pricing) **Control what your team exposes**Approvals, policies, one flat bill\.Nothing goes public without an approval\. Team access policies, shared subdomains, and organization billing — one flat price, no per\-seat charges\. Audit log available on Enterprise\. [See the Team plan →](https://portzero.net/#pricing) Agent\-ready ## Ready for agentic coding Point your coding agent at Port Zero and it handles the tunnel for you — no copy\-pasting JSON, no guessing ports\. - **Easy configuration**One command wires up every AI coding agent it finds on your machine\. - **MCP**`portzero mcp`exposes live tunnel and service state as tools an agent can call directly\. - **Skill**`portzero skill install`teaches an agent to extract a production topology from your compose file\. See[the AI agents doc](https://portzero.net/docs/ai-agents)for the full MCP tool reference, or paste[the condensed reference](https://portzero.net/llms.txt)into any agent working in your repo\. ## Download Choose the Port Zero CLI installer for your platform\. Port Zero Local \(`\*\.portzero\.local`tunnels\) is free, open\-source software under the[GNU GPL v3\.0](https://github.com/PortZeroNetwork/portzero/blob/staging/LICENSE)\. Cloud features are governed by the[Terms of Service](https://portzero.net/terms)\. ## Pricing Local tunnels are always free and don't require a portzero\.cloud account\. Paid plans are flat — no meters, no overages, no per\-seat charges\. ### Free and Open Source - Unlimited local tunnels, open source - Cloud tunnels on paid plans - Community support [Download](https://portzero.net/#download) Most popular### Professional $49/mo or $490/yr billed yearly Everything inFree, plus: - Unlimited cloud tunnels - Generous cloud bandwidth & requests\* - Visitor auth & access control - Feedback comments on live tunnels [Get started](https://app.portzero.net/#/settings?checkout_plan=professional&cadence=monthly) ### Team $149/mo or $1,490/yr billed yearly Everything inProfessional, plus: - Unlimited members — no per\-seat charges - Teams & member invites - Shared team subdomains - Team naming & access policies - Cloud\-tunnel approvals - Organization billing [Get started](https://app.portzero.net/#/teams) ### Enterprise Everything inTeam, plus: - Audit log - Custom terms & higher limits - Security\-review support - Dedicated onboarding [Contact sales](https://app.portzero.net/#/contact) ### Compare all features \* Cloud bandwidth and requests are generous and subject to fair use — see our[Terms of Service](https://portzero.net/terms#fair-use)\. ## Set your ports to 0\. Port Zero handles the rest — no conflicts, ever\. Free and open source to start\.