Relay is a secure connectivity platform for developers. It shares a service running on one machine — a local website, API, database, development server or device workflow — with another machine, using simple access codes instead of public ports or complicated connection strings.
Whatever you already run — port 3000 in this example.
In your project directory. Nothing to install first, no config change.
npx --package @paddy-systems/relay-cli relay 3000Relay prints a short code. Enter it on the other device, or scan the QR code on Android.
Local service
Connects with the code
Free forever · No account required
Devices connect over the local network. Connect CLI-to-CLI, pair an Android device by QR code, or open a local browser connection. Local connectivity is free and unlimited, with no payment details asked for.
For connections outside the local network
Relay's cloud control plane authenticates users, creates temporary sessions and securely forwards traffic between machines. Paid plans cover cloud reach and additional control — browser access, remote CLI connections, persistent projects, session history, diagnostics, shared links and team collaboration.
Keep whatever is already running — a web application on port 3000, an API, a database, a development server.
Run Relay and choose to share that service. The service itself stays local.
Relay creates a short code, such as R-XXXX-XXXX or L-XXXX-XXXX. Another device uses that code to connect.
When the session expires or is stopped, access ends. Relay provides the secure connection path; the service never becomes publicly exposed.
Relay works with whatever your dev server is already serving — no SDK, plugin or config change.
Relay is a development connectivity layer. It makes private, local services reachable in a controlled way — nothing more, on purpose.
npx --package @paddy-systems/relay-cli relay 3000