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MCP Kotlin Server Sample

MCP Kotlin Server Sample

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github.com/wujingweDeveloper Tools1Updated 74w ago
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About MCP Kotlin Server Sample

MCP Kotlin Server Sample is a Kotlin example MCP server demonstrating multiple operating modes and transports for JVM and WASM targets. It includes prompt, resource, and tool management for developers exploring server implementations.

Key features

  1. 01JVM and WASM support
  2. 02stdio server mode
  3. 03SSE transport modes
  4. 04Prompt management and change notifications
  5. 05Resource and tool management

Use cases

  1. 01参考 Kotlin MCP 服务实现
  2. 02Compare JVM and WASM runtime modes
  3. 03Test prompt, resource, and tool capabilities

MCP support

It demonstrates MCP server capabilities over stdio and SSE, including prompts, resources, tools, and list-change notifications.

#mcp#kotlin#server#sse#multiplatform

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

No install method listed yet

We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.

Repository

Tools

No tool list yet

Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.

Details

From the project README

MCP Kotlin Server Sample

A sample implementation of an MCP (Model Communication Protocol) server in Kotlin that demonstrates different server configurations and transport methods for both JVM and WASM targets.

Features

  • Multiple server operation modes:
    • Standard I/O server (JVM only)
      • SSE (Server-Sent Events) server with plain configuration (JVM, WASM)
      • SSE server using Ktor plugin (JVM, WASM)
  • Multiplatform support
  • Built-in capabilities for:
    • Prompts management
    • Resources handling
    • Tools integration

Getting Started

Running the Server

You can run the server on the JVM or using Kotlin/WASM on Node.js.

JVM:

To run the server on the JVM (defaults to SSE mode with Ktor plugin on port 3001):

./gradlew runJvm
WASM:

To run the server using Kotlin/WASM on Node.js (defaults to SSE mode with Ktor plugin on port 3001):

./gradlew wasmJsNodeDevelopmentRun
Connecting to the Server

For servers on JVM or WASM:

  1. Start the server
  2. Use the MCP inspector to connect to http://localhost:<port>/sse

Server Capabilities

  • Prompts: Supports prompt management with list change notifications
  • Resources: Includes subscription support and list change notifications
  • Tools: Supports tool management with list change notifications

Implementation Details

The server is implemented using:

  • Ktor for HTTP server functionality
  • Kotlin coroutines for asynchronous operations
  • SSE for real-time communication
  • Standard I/O for command-line interface
  • Common Kotlin code shared between JVM and WASM targets

Comments

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New to MCP?

From what the protocol is to installing your first server, these answers cover most first questions.

An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.