Hydroxyl runs on your own machine — the client starts it, so there is no endpoint to ping. 42 installs a week from npm. Last commit 19 Oct 2026.
Local stdio MCP server: publication figures, structure checks and conversions for AI assistants
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.
"eNq1vHdAVMcTOL67790dINLhQDonYC8cRexYUQEBkSIWUFBQmmABFRFRQRQrdsSuqFiDNXbskmhioom9phijxJjE4N3ed3bfUUzy+f2+vz9+HPN23+zu7Ozs7OxsuUMYIWSK5iABZQzs138AeScGA0YD0G9g6NBhQacW/4oQ7o2Qge3AYcP72I43X4KQYTSkHx46rKNX9rs2iQgZGcN73LCIgIgf027Yw3sKvAeOS43P2HZ6QCG8VyFEzCbEZ2UA3gwh44sQGkxIyRl/1…
if (!names.every((name) => existsSync(path.join(root, name)))) return "";
"eNq1vHdAVMcTOL67790dINLhQDonYC8cRexYUQEBkSIWUFBQmmABFRFRQRQrdsSuqFiDNXbskmhioom9phijxJjE4N3ed3bfUUzy+f2+vz9+HPN23+zu7Ozs7OxsuUMYIWSK5iABZQzs138AeScGA0YD0G9g6NBhQacW/4oQ7o2Qge3AYcP72I43X4KQYTSkHx46rKNX9rs2iQgZGcN73LCIgIgf027Yw3sKvAeOS43P2HZ6QCG8VyFEzCbEZ2UA3gwh44sQGkxIyRl/1…
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
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.
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 hydroxyl -- npx -y hydroxyl-mcp
{
"mcpServers": {
"hydroxyl": {
"command": "npx",
"args": [
"-y",
"hydroxyl-mcp"
]
}
}
}
[mcp_servers.hydroxyl]
command = "npx"
args = ["-y", "hydroxyl-mcp"]
{
"mcpServers": {
"hydroxyl": {
"command": "npx",
"args": [
"-y",
"hydroxyl-mcp"
]
}
}
}
{
"servers": {
"hydroxyl": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"hydroxyl-mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
HYDROXYL_EDITOR_URL (Editor that editor_link points at (default https://hydroxyl.app/editor/)).
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Answers built from our own checks of this server.