+------------------------+
| LLM Client (VSCode)    |
| Copilot / Chat UI      |
+-----------+------------+
            |
            v
+------------------------+
| MCP Server             |
| (server.js / aps)      |
+-----------+------------+
            |
------------------------------------------------
      |                |                |
      v                v                v
+-------------+ +-------------+ +----------------+
| External    | |   APS APIs  | |  Custom Logic  |
| APIs        | | (OAuth)     | |   / Tools      |
+-------------+ +-------------+ +----------------+

User Prompt
↓
LLM decides tool
↓
MCP Server executes tool
↓
External API / APS call
↓
Structured response → LLM → User

├── .vscode/
│ └── mcp.json # MCP configuration for VS Code client
│
├── node_modules/ # Installed dependencies
│
├── .env # Environment variables (API keys, secrets)
├── .gitignore # Git ignored files
│
├── agent.js # Agent logic (tool orchestration)
├── aps-server.js # APS integration server (OAuth + APIs)
├── client.js # Custom MCP client implementation
├── server.js # Core MCP server (tool definitions)
│
├── package.json # Project metadata & dependencies
├── package-lock.json # Dependency lock file

npm install

PORT=3000

# APS Credentials
APS_CLIENT_ID=your_client_id
APS_CLIENT_SECRET=your_client_secret

# External APIs
GEMINI_API_KEY=your_key

node server.js

MCP server running at http://localhost:3000/mcp

{
  "servers": {
    "devcon-workshop": {
      "type": "http",
      "url": "http://localhost:3000/mcp"
    },
    "devcon-aps": {
      "type": "http",
      "url": "http://localhost:3001/mcp"
    }
  }
}

#add 10 and 20
#greet John in spanish
What's the weather in London?

server.registerTool(
"tool_name",
{
description: "Tool description",
inputSchema: {
param: z.string()
}
},
async ({ param }) => ({
content: [{ type: "text", text: "Result" }]
})
);