mcp-server-plugin

[](https://github.com/JetBrains#jetbrains-on-github) # JetBrains MCP Server Plugin JetBrains MCP (Model Context Protocol) Server Plugin enables seamless integration between Large Language Models (LLMs) and JetBrains IDEs. This plugin provides the server-side implementation for handling MCP requests and exposes extension points for implementing custom tools. ## Prerequisites - Installation of [JetBrains MCP Proxy](https://github.com/JetBrains/mcpProxy) - JetBrains IDE (IntelliJ IDEA, WebStorm, etc.) ## Custom Tools Implementation The plugin provides an extension point system that allows third-party plugins to implement their own MCP tools. Here's how to implement and register your custom tools: ### 1. Creating a Custom Tool Create a class that extends `AbstractMcpTool`: ```kotlin class MyCustomTool : AbstractMcpTool<MyArgs>() { override val name: String = "myCustomTool" override val description: String = "Description of what your tool does" override fun handle(project: Project, args: MyArgs): Response { // Implement your tool's logic here return Response.ok("Result") } } // Define your arguments data class @Serializable data class MyArgs( val param1: String, val param2: Int ) ``` ### 2. Registering Your Tool To register your tool, add it as an extension in your plugin.xml: ```xml <idea-plugin> <!-- Your plugin config --> <depends>com.intellij.mcpServer</depends> <extensions defaultExtensionNs="com.intellij.mcpServer"> <mcpTool implementation="com.example.MyCustomTool"/> </extensions> </idea-plugin> ``` ### 3. Tool Implementation Guidelines Your tool implementation should follow these guidelines: - Tool names should be descriptive and use lowercase with optional underscores - Create a data class for your tool's arguments that matches the expected JSON input - Use the Response class appropriately: - `Response(result)` for successful operations - `Response(error = message)` for error cases - Utilize the provided Project instance for accessing IDE services ## How to Publish Update 1. Update `settings.gradle.kts` to provide a new version 2. Create release on Github, the publishing task will be automatically triggered ## Contributing We welcome contributions! Please feel free to submit a Pull Request.