PairOnce runs on your own machine — the client starts it, so there is no endpoint to ping. 4 014 installs a week from npm. Last commit 6 Nov 2026.
Send files and text between an AI agent and your own paired devices, end-to-end encrypted.
What the code does
We read the source, 1 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
const child = spawn(process.execPath, [...process.execArgv, ...process.argv.slice(1)], { stdio: "inherit", env: { ...process.env, NODE_USE_ENV_PROXY: "1", NODE_NO_WARNINGS: "1" } });
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add cli -- npx -y paironce{
"mcpServers": {
"cli": {
"command": "npx",
"args": [
"-y",
"paironce"
]
}
}
}[mcp_servers.cli]
command = "npx"
args = ["-y", "paironce"]{
"mcpServers": {
"cli": {
"command": "npx",
"args": [
"-y",
"paironce"
]
}
}
}{
"servers": {
"cli": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"paironce"
]
}
}
}Alternatives to PairOnce
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PairOnce — questions
Answers built from our own checks of this server.