kotlin-sdk/samples/kotlin-mcp-server/README.md
Pavel Gorgulov 458a49a5fb
Fix kotlin-mcp-server example and update samples (#345)
- updated the sdk version in all examples
- fixed `kotlin-mcp-server` example (#331)

## Motivation and Context
Removed the WASM example, as it duplicates the JVM example and only adds
unnecessary complexity

## How Has This Been Tested?
Locally

## Breaking Changes
No

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [x] I have added or updated documentation as needed
2025-10-31 12:21:46 +01:00

75 lines
2 KiB
Markdown

# MCP Kotlin Server Sample
A sample implementation of an MCP (Model Context Protocol) server in Kotlin that demonstrates different server
configurations and transport methods.
## Features
- Multiple server operation modes:
- Standard I/O server
- SSE (Server-Sent Events) server with plain configuration
- SSE server using Ktor plugin
- Built-in capabilities for:
- Prompts management
- Resources handling
- Tools integration
## Getting Started
### Running the Server
The server defaults to SSE mode with Ktor plugin on port 3001. You can customize the behavior using command-line arguments.
#### Default (SSE with Ktor plugin):
```bash
./gradlew run
```
#### Standard I/O mode:
```bash
./gradlew run --args="--stdio"
```
#### SSE with plain configuration:
```bash
./gradlew run --args="--sse-server 3001"
```
#### SSE with Ktor plugin (custom port):
```bash
./gradlew run --args="--sse-server-ktor 3002"
```
### Connecting to the Server
For SSE servers:
1. Start the server
2. Use the [MCP inspector](https://modelcontextprotocol.io/docs/tools/inspector) to connect to `http://localhost:<port>/sse`
For STDIO servers:
- Connect using an MCP client that supports STDIO transport
## 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 (SSE modes)
- Kotlin coroutines for asynchronous operations
- SSE for real-time communication in web contexts
- Standard I/O for command-line interface and process-based communication
## Example Capabilities
The sample server demonstrates:
- **Prompt**: "Kotlin Developer" - helps develop small Kotlin applications with a configurable project name
- **Tool**: "kotlin-sdk-tool" - a simple test tool that returns a greeting
- **Resource**: "Web Search" - a placeholder resource demonstrating resource handling