Constellation runs on your own machine — the client starts it, so there is no endpoint to ping. 311 installs a week from npm. Last commit 27 Oct 2026.
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What the code does
We read the source, 5 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 configPath = path.join(currentDir, this.CONFIG_FILENAME);
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 constellation -e 'CONSTELLATION_ACCESS_KEY=<CONSTELLATION_ACCESS_KEY>' -- npx -y @constellationdev/mcp{
"mcpServers": {
"constellation": {
"command": "npx",
"args": [
"-y",
"@constellationdev/mcp"
],
"env": {
"CONSTELLATION_ACCESS_KEY": "<CONSTELLATION_ACCESS_KEY>"
}
}
}
}[mcp_servers.constellation]
command = "npx"
args = ["-y", "@constellationdev/mcp"]
env = { CONSTELLATION_ACCESS_KEY = "<CONSTELLATION_ACCESS_KEY>" }{
"mcpServers": {
"constellation": {
"command": "npx",
"args": [
"-y",
"@constellationdev/mcp"
],
"env": {
"CONSTELLATION_ACCESS_KEY": "<CONSTELLATION_ACCESS_KEY>"
}
}
}
}{
"servers": {
"constellation": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@constellationdev/mcp"
],
"env": {
"CONSTELLATION_ACCESS_KEY": "<CONSTELLATION_ACCESS_KEY>"
}
}
}
}Put your own value in place of
<CONSTELLATION_ACCESS_KEY> (Your Constellation access key).
The author’s registry entry marks it as required.
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Constellation — questions
Answers built from our own checks of this server.