chore(mcp): add Postman MCP server stdio config and demo

Author: NguyenCuong1989

.vscode/mcp.json

@@ -0,0 +1,24 @@
+{
+    "servers": {
+        "postman": {
+            "type": "stdio",
+            "command": "npx",
+            "args": [
+                "-y",
+                "@postman/postman-mcp-server",
+                "--minimal",
+                "--region us"
+            ],
+            "env": {
+                "POSTMAN_API_KEY": "${input:postman-api-key}"
+            }
+        }
+    },
+    "inputs": [
+        {
+            "id": "postman-api-key",
+            "type": "promptString",
+            "description": "Enter your Postman API key"
+        }
+    ]
+}

MCP_POSTMAN_DEMO.md

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+# Postman MCP Server (local) — setup + demo
+
+This repo includes an MCP configuration for the **Postman MCP Server** using **stdio** transport.
+
+## 1) Configure Postman API key
+
+The MCP server requires `POSTMAN_API_KEY`.
+
+Your MCP host (VS Code / other MCP host) should prompt for the input defined in `.vscode/mcp.json`.
+
+If your MCP host supports env vars directly, you can also set:
+
+```bash
+export POSTMAN_API_KEY="<YOUR_POSTMAN_API_KEY>"
+```
+
+## 2) Start the MCP server
+
+The server is started by your MCP host using the configuration in:
+
+- `.vscode/mcp.json`
+
+It uses:
+- `npx -y @postman/postman-mcp-server --minimal --region us`
+
+## 3) Demonstrate a tool capability
+
+Once the MCP host is connected and the server is running, call (tool name in Postman MCP v2.x):
+
+- `getWorkspaces`
+
+Expected: JSON listing workspaces you have access to.
+
+## Notes
+
+- This configuration uses **minimal** tool set to keep startup time low.
+- To enable more tools, update the MCP server args from `--minimal` to `--full`.