Cairn runs on your own machine — the client starts it, so there is no endpoint to ping. 104 installs a week from pypi. Last commit 29 Jul 2026.
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We read the source, 5 d ago · rules 995398eba69f
Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.
for p in root.rglob("*.md"):
return __import__(module)
for p in root.rglob("*.md"):
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
Today is the operative word: we check Cairn every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
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 cairn -- uvx cairn-mcp-server
{
"mcpServers": {
"cairn": {
"command": "uvx",
"args": [
"cairn-mcp-server"
]
}
}
}
[mcp_servers.cairn]
command = "uvx"
args = ["cairn-mcp-server"]
{
"mcpServers": {
"cairn": {
"command": "uvx",
"args": [
"cairn-mcp-server"
]
}
}
}
{
"servers": {
"cairn": {
"type": "stdio",
"command": "uvx",
"args": [
"cairn-mcp-server"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
CAIRN_WORKSPACE (Path to the folder Cairn operates on. If unset, defaults to the current working directory. You can also pass --workspace on the command line instead).
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Answers built from our own checks of this server.