[Example app] Elasticsearch MCP server

Author: jedrazb

example-apps/elasticsearch-mcp-server/.gitignore

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+dist
+node_modules

example-apps/elasticsearch-mcp-server/.nvmrc

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+v22.12.0

example-apps/elasticsearch-mcp-server/README.md

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+# Elasticsearch MCP Server
+
+Connect to your Elasticsearch data directly from any MCP Client (like Claude Desktop) using the Model Context Protocol (MCP).
+
+This server connects agents to your Elasticsearch data using the Model Context Protocol (MCP). It allows you to interact with your Elasticsearch indices through natural language conversations.
+
+## Features
+
+- **List Indices**: View all available Elasticsearch indices
+- **Get Mappings**: Inspect field mappings for specific indices
+- **Search**: Execute Elasticsearch queries using full Query DSL capabilities with automatic highlighting
+
+## Prerequisites
+
+- Node.js (v22+)
+- An Elasticsearch instance
+- Elasticsearch API key with appropriate permissions
+- Claude Desktop App (free version is sufficient)
+
+## Setup Guide
+
+Make sure you use a supported Node.js version:
+
+```
+nvm use
+```
+
+### 1. Install Dependencies
+
+```bash
+npm install
+```
+
+### 2. Build the Project
+
+```bash
+npm run build
+```
+
+
+### 3. Configure Claude Desktop App
+
+1. Open Claude Desktop App
+2. Go to Settings > Developer > MCP Servers
+3. Click `Edit Config` and add a new MCP Server with the following configuration to your `claude_desktop_config.json`:
+
+```json
+{
+  "mcpServers": {
+    "Elasticsearch MCP Server": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "node@22",
+        "/path/to/your/project/dist/index.js"
+      ],
+      "env": {
+        "ES_URL": "...",
+        "ES_API_KEY": "..."
+      }
+    }
+  }
+}
+```
+
+Replace `/path/to/your/elasticsearch-mcp/dist/index.js` with the actual path to the built JavaScript file, and fill in your Elasticsearch URL and API key.
+
+### 4. Start a Conversation
+
+1. Open a new conversation in Claude Desktop App
+2. The MCP server should connect automatically
+3. You can now ask Claude questions about your Elasticsearch data
+
+## Example Questions
+
+- "What indices do I have in my Elasticsearch cluster?"
+- "Show me the field mappings for the 'products' index"
+- "Find all orders over $500 from last month"
+- "Which products received the most 5-star reviews?"
+
+## How It Works
+
+When you ask Claude a question about your data:
+
+1. Claude analyzes your request and determines which Elasticsearch operations are needed
+2. The MCP server carries out these operations (listing indices, fetching mappings, performing searches)
+3. Claude processes the results and presents them in a user-friendly format
+
+## Troubleshooting
+
+- If the server isn't connecting, check that the path in your MCP configuration is correct
+- Ensure your Elasticsearch URL is accessible from your machine
+- Verify that your API key has the necessary permissions
+- Check the terminal output for any error messages
+
+You can also use the inspector tool to debug your MCP server:
+
+```bash
+npm run inspector
+```
+
+## Security Best Practices
+
+You can create a dedicated Elasticsearch API key with minimal permissions for Claude's access to your data:
+
+```
+POST /_security/api_key
+{
+  "name": "claude-mcp-access",
+  "role_descriptors": {
+    "claude_role": {
+      "cluster": ["monitor"],
+      "indices": [
+        {
+          "names": ["index-1", "index-2", "index-pattern-*"],
+          "privileges": ["read", "view_index_metadata"]
+        }
+      ]
+    }
+  }
+}
+```