Add Helidon MCP Server

servers/helidon-mcp-server/readme.md

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+# Helidon MCP Server
+
+A base MCP (Model Context Protocol) server implementation using Helidon framework, containerized with Docker for easy deployment and testing.
+
+## Features
+
+- **MCP Protocol Support**: Implements the Model Context Protocol for tool discovery and execution
+- **Docker Containerized**: Ready-to-use Docker image with multi-stage build
+- **Java 21**: Built with modern Java features and Helidon 4.0.7
+- **Self-contained JAR**: All dependencies included in a single executable JAR
+- **HTTP Server**: RESTful API endpoints for MCP protocol communication
+- **JSON-RPC Support**: Full JSON-RPC 2.0 protocol implementation
+
+## Documentation
+
+For detailed documentation, deployment guides, and troubleshooting, visit: [https://github.com/thesurenk/helidon-mcp-server](https://github.com/thesurenk/helidon-mcp-server)
+
+## Quick Start
+
+1. The server runs on port 8080 by default
+2. Access the MCP endpoint at `http://localhost:8080/mcp`
+3. Use JSON-RPC protocol for communication
+
+## Configuration
+
+- **Server Port**: Configurable via `SERVER_PORT` environment variable (default: 8080)
+- **Docker Image**: Built with multi-stage build for optimal size
+- **Java Runtime**: Eclipse Temurin 21 JRE

servers/helidon-mcp-server/server.yaml

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+name: helidon-mcp-server
+image: mcp/helidon-mcp-server
+type: server
+meta:
+  category: productivity
+  tags:
+    - productivity
+    - java
+    - helidon
+    - mcp
+about:
+  title: Helidon MCP Server
+  description: A base MCP (Model Context Protocol) server implementation using Helidon framework, containerized with Docker for easy deployment and testing.
+  icon: https://avatars.githubusercontent.com/u/182288589?s=200&v=4
+source:
+  project: https://github.com/thesurenk/helidon-mcp-server
+  commit: main
+config:
+  description: Configure the Helidon MCP Server
+  env:
+    - name: SERVER_PORT
+      example: 8080
+      value: '{{helidon-mcp-server.server_port}}'
+  parameters:
+    type: object
+    properties:
+      server_port:
+        type: string
+        default: "8080"
+        description: "Port for the MCP server to listen on"
+    required: []

servers/helidon-mcp-server/tools.json

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+[
+  {
+    "name": "mcp_ping",
+    "description": "Ping the MCP server to check connectivity",
+    "arguments": []
+  },
+  {
+    "name": "mcp_list_tools",
+    "description": "List available tools from the MCP server",
+    "arguments": []
+  }
+]