Pursers MCP Server

What the code does

We read the source, 7 h ago · rules 3dff92dd89df

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

    completed = subprocess.run(

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.

        f"{plist} ~/Library/LaunchAgents/{label}.plist && launchctl bootstrap "

        remote = subprocess.run(

    execFile(command, args, {

        with patch.dict(os.environ, environment, clear=False):

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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 pursers -- uvx pursers-central

{
  "mcpServers": {
    "pursers": {
      "args": [
        "pursers-central"
      ],
      "command": "uvx"
    }
  }
}

[mcp_servers.pursers]
command = "uvx"
args = ["pursers-central"]

{
  "mcpServers": {
    "pursers": {
      "args": [
        "pursers-central"
      ],
      "command": "uvx"
    }
  }
}

{
  "mcpServers": {
    "pursers": {
      "args": [
        "pursers-central"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: ONBOARD_CENTRAL_HOST (Loopback bind host used by the packaged runtime), ONBOARD_CENTRAL_PORT (Loopback bind port used by the packaged runtime), ONBOARD_CENTRAL_DATA_DIR (Private Central data directory; --data-dir/--data-root is the equivalent CLI input), ONBOARD_CENTRAL_LOG_LEVEL (Packaged runtime log level), ONBOARD_CENTRAL_ALLOWED_HOSTS (Optional comma-separated bare Host names accepted in addition to the bind host), ONBOARD_CENTRAL_TLS_CERTFILE (Optional TLS certificate path; requires ONBOARD_CENTRAL_TLS_KEYFILE), ONBOARD_CENTRAL_TLS_KEYFILE (Optional TLS private-key path; requires ONBOARD_CENTRAL_TLS_CERTFILE), CENTRAL_ADMISSION (Central admission policy; Pursers supports invite-only admission), CENTRAL_AUTH_MODE (Central authentication mode; Pursers supports JWT authentication), CENTRAL_JWKS_PATH (Path to the issuer public JWKS used to verify seat credentials), CENTRAL_JWT_AUDIENCE (MCP resource URL in audience and resource claims; defaults to the loopback bind URL), CENTRAL_JWT_CLOCK_SKEW (Allowed JWT clock skew in seconds), CENTRAL_JWT_ISSUER (Exact issuer URL in every accepted seat credential), CENTRAL_PRINCIPAL_STREAM_CAP (Maximum concurrent event streams accepted per principal), CENTRAL_REAPER_INTERVAL_S (Interval in seconds between expired-lease reaper sweeps), CENTRAL_REQUEST_STATE_KEY_FILE (Optional restart-safe request-state keyring path), PURSERS_LEGACY_TOOLS (String flag: use 1 to expose deprecated coordination tools; use 0 to keep them hidden), STORE_BACKEND (Central storage backend; Pursers supports SQLite). The author declared them in the registry entry; get the values from the project itself.