Port Zero — stable domains for your local dev ports

Developer networking, without port conflictsEliminate port conflictsSet 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.tsweb.myapp-feat-checkout-redesign.portzero.localgit worktree feat/checkout-redesignHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431web.myapp-feat-dark-mode.portzero.localgit worktree feat/dark-modeHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431One machine, many branchesRun every branch at once, in git worktreesEach 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.tsweb.myapp-feat-checkout-redesign.portzero.localgit worktree feat/checkout-redesignHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431web.myapp-feat-dark-mode.portzero.localgit worktree feat/dark-modeHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431Beyond your machineSee it on your phoneLocal 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.tsnodejs-typescript-process.portzero.localHello from the PortZero Node.js TypeScript process example. PZ_TUNNEL=nodejs-typescript-process.portzero.local:80 localhost_port=52431nodejs-typescript-process.acme.tunnel.portzero.cloudHello 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 → 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 → See it on your phone Local domains stop at your machine. Tunnels don't.

Audit log available on Enterprise. See the Team plan → Agent-readyReady for agentic codingPoint your coding agent at Port Zero and it handles the tunnel for you — no copy-pasting JSON, no guessing ports.Easy configurationOne command wires up every AI coding agent it finds on your machine.MCPportzero mcp exposes live tunnel and service state as tools an agent can call directly.Skillportzero skill install teaches an agent to extract a production topology from your compose file.bash — agent See the AI agents doc for the full MCP tool reference, or paste the condensed reference into any agent working in your repo. DownloadChoose 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. Cloud features are governed by the Terms of Service. PricingLocal 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$0Free foreverUnlimited local tunnels, open sourceCloud tunnels on paid plansCommunity supportDownloadMost popularProfessional$49/moor $490/yr billed yearlyEverything in Free, plus:Unlimited cloud tunnelsGenerous cloud bandwidth & requests*Visitor auth & access controlFeedback comments on live tunnelsGet startedTeam$149/moor $1,490/yr billed yearlyEverything in Professional, plus:Unlimited members — no per-seat chargesTeams & member invitesShared team subdomainsTeam naming & access policiesCloud-tunnel approvalsOrganization billingGet startedEnterpriseCustomContact usEverything in Team, plus:Audit logCustom terms & higher limitsSecurity-review supportDedicated onboardingContact salesCompare all featuresFeaturesFree and Open SourceProfessionalTeamEnterprisePrice$0$49/mo$149/moCustomTunnels & usageLocal tunnelsUnlimitedUnlimitedUnlimitedUnlimitedCloud tunnels0UnlimitedUnlimitedUnlimitedCloud requests / month0Fair use*Fair use*Fair use*Cloud bandwidth / month0Fair use*Fair use*Fair use*Access & sharingTunnel visitor auth & access control—Feedback comments—Usage metrics—Priority support—Teams & governanceTeam members (flat, no per-seat)00UnlimitedUnlimitedTeams & member invites——Team subdomains——Team naming policies——GitHub-OIDC CI credentials——Team tunnel access policies——Cloud-tunnel approvals——Organization billing——Audit log———* Cloud bandwidth and requests are generous and subject to fair use — see our Terms of Service. Set your ports to 0. Port Zero handles the rest — no conflicts, ever. Free and open source to start.