system-info-resources.ts•3.4 kB
/**
* System Information Resources
*
* Example MCP resources that provide system and environment information.
*/
import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { MCPModule } from "../types/index.js";
import { hostname, platform, arch, cpus, totalmem, freemem } from "os";
/**
* Resource registration function for system information
*/
async function register(server: McpServer): Promise<void> {
// Register static system info resource
server.registerResource(
"system-info",
"system://info",
{
title: "System Information",
description: "Basic system and environment information",
mimeType: "application/json"
},
async (uri) => {
const systemInfo = {
hostname: hostname(),
platform: platform(),
architecture: arch(),
nodeVersion: process.version,
cpuCount: cpus().length,
totalMemory: Math.round(totalmem() / 1024 / 1024 / 1024) + " GB",
freeMemory: Math.round(freemem() / 1024 / 1024 / 1024) + " GB",
uptime: Math.round(process.uptime()) + " seconds",
timestamp: new Date().toISOString()
};
return {
contents: [
{
uri: uri.href,
mimeType: "application/json",
text: JSON.stringify(systemInfo, null, 2)
}
]
};
}
);
// Register dynamic environment variable resource
server.registerResource(
"env-var",
new ResourceTemplate("env://{varName}", { list: undefined }),
{
title: "Environment Variable",
description: "Access environment variables by name"
},
async (uri, { varName }) => {
const value = process.env[varName as string];
if (value === undefined) {
return {
contents: [
{
uri: uri.href,
mimeType: "text/plain",
text: `Environment variable '${varName}' is not set`
}
]
};
}
return {
contents: [
{
uri: uri.href,
mimeType: "text/plain",
text: value
}
]
};
}
);
// Register process information resource
server.registerResource(
"process-info",
"process://info",
{
title: "Process Information",
description: "Current Node.js process information",
mimeType: "application/json"
},
async (uri) => {
const processInfo = {
pid: process.pid,
ppid: process.ppid,
platform: process.platform,
arch: process.arch,
nodeVersion: process.version,
execPath: process.execPath,
argv: process.argv,
cwd: process.cwd(),
memoryUsage: process.memoryUsage(),
uptime: process.uptime(),
timestamp: new Date().toISOString()
};
return {
contents: [
{
uri: uri.href,
mimeType: "application/json",
text: JSON.stringify(processInfo, null, 2)
}
]
};
}
);
}
/**
* Export the MCP module
*/
export const systemInfoResources: MCPModule = {
register,
metadata: {
name: "system-info-resources",
description: "System and environment information resources for MCP",
version: "1.0.0",
author: "PCN"
}
};
export default systemInfoResources;