Any React app
   │  POST /api/login  { apiKey }
   │  Authorization: Bearer <token>
   ├─► POST /api/agent   (plain English)
   ├─► /api/*            (REST Mongo helpers)
   └─► /mcp              (MCP Streamable HTTP for agent hosts)
              │
              ▼
     demo-mcp-server
        ├── agents/mongo
        └── agents/excel

npm install
npm run api          # http://127.0.0.1:3000
npm run mcp          # stdio for Cursor

const login = await fetch('http://127.0.0.1:3000/api/login', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ apiKey: import.meta.env.VITE_MCP_API_KEY }),
}).then((r) => r.json());

const token = login.token;

const result = await fetch('http://127.0.0.1:3000/api/agent', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    Authorization: `Bearer ${token}`,
  },
  body: JSON.stringify({ prompt: 'show rows in people' }),
}).then((r) => r.json());

CORS_ORIGIN=http://localhost:5173,http://localhost:3001

src/
  agents/
    mongo/          # Agent 1
    excel/          # Agent 2
    catalog.ts      # Public agent list
  orchestrator/     # Plain-English → tool calls (LLM or rules)
  mcp/              # MCP factory + stdio
  http/             # REST + /mcp + login auth
  shared/db/        # Mongo connection helpers
data/workbook.xlsx