Update README

Author: smithery-ai[bot]

README.md

@@ -1,5 +1,7 @@
 # MongoDB MCP Server
 
+[![smithery badge](https://smithery.ai/badge/@mongodb-js/mongodb-mcp-server)](https://smithery.ai/server/@mongodb-js/mongodb-mcp-server)
+
 A Model Context Protocol server for interacting with MongoDB Databases and MongoDB Atlas.
 
 ## 📚 Table of Contents
@@ -34,6 +36,14 @@ node -v
 
 ## Setup
 
+### Installing via Smithery
+
+To install MongoDB MCP Server for Claude Desktop automatically via [Smithery](https://smithery.ai/server/@mongodb-js/mongodb-mcp-server):
+
+```bash
+npx -y @smithery/cli install @mongodb-js/mongodb-mcp-server --client claude
+```
+
 ### Quick Start
 
 Most MCP clients require a configuration file to be created or modified to add the MCP server.