Aletheia Runtime Safety & Scope Creep Filter MCP Server

What the code does

We read the source, 11 min ago · rules 3dff92dd89df

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

- **Filesystem Excursions**: A request to "inspect git diff" escalating to deleting untracked files with \`git clean -fdx\` or \`rm -rf\`.

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 hasDelete = /\bDELETE\s+FROM\b/i.test(repSpace) || /\bDELETE\s+FROM\b/i.test(repCollapsed);

      this.childProcess = spawn(downstreamCommand, downstreamArgs, {

            trimmed.includes("/.ssh/") ||

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

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 aletheia-mcp -- npx -y aletheia-mcp

{
  "mcpServers": {
    "aletheia-mcp": {
      "args": [
        "-y",
        "aletheia-mcp"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.aletheia-mcp]
command = "npx"
args = ["-y", "aletheia-mcp"]

{
  "mcpServers": {
    "aletheia-mcp": {
      "args": [
        "-y",
        "aletheia-mcp"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "aletheia-mcp": {
      "args": [
        "-y",
        "aletheia-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: ALETHEIA_ALLOW_WRITE (Set to "true" to authorize filesystem writes (equivalent to --allow-write).), ALETHEIA_ALLOW_NETWORK (Set to "true" to authorize outbound network requests (equivalent to --allow-network).), ALETHEIA_ALLOW_LOOPBACK (Set to "true" to authorize requests to localhost / 127.0.0.1 (equivalent to --allow-loopback).), ALETHEIA_OPERATOR_SECRET (Operator token required to loosen an already-running session's mandate at runtime.). The author declared them in the registry entry; get the values from the project itself.