Shadowjoin runs on your own machine — the client starts it, so there is no endpoint to ping. 747 installs a week from npm. Last commit 15 Oct 2026.
Measure the matches your exact join is silently dropping, and get the rule that fixes each.
What the code does
We read the source, 4 h ago · rules ccca72095570
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.
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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 shadowjoin -- npx -y shadowjoin{
"mcpServers": {
"shadowjoin": {
"args": [
"-y",
"shadowjoin"
],
"command": "npx"
}
}
}[mcp_servers.shadowjoin]
command = "npx"
args = ["-y", "shadowjoin"]{
"mcpServers": {
"shadowjoin": {
"args": [
"-y",
"shadowjoin"
],
"command": "npx"
}
}
}{
"mcpServers": {
"shadowjoin": {
"args": [
"-y",
"shadowjoin"
],
"command": "npx"
}
}
}This one needs environment variables set before it will start:
SHADOWJOIN_CONFIG (Absolute path to shadowjoin.config.json, which names your data sources. Connection strings live here and never pass through a tool call.).
The author declared them in the registry entry; get the values from the project itself.
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Shadowjoin — questions
Answers built from our own checks of this server.