Which integrations are available for this server?

Enables interaction with Slack, providing tools to manage messages, channels, and workspace communications.

How do I use LeanMCP Minimal Server?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@LeanMCP Minimal Server Show me the list of available products" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

Slack MCP Server

MCP Server with Streamable HTTP Transport built with LeanMCP SDK

Quick Start

# Install dependencies npm install # Start development server (hot reload + UI build) npm run dev # Build for production npm run build # Run production server npm start

Project Structure

leanmcp-minimal/ ├── main.ts # Server entry point ├── mcp/ # Services directory (auto-discovered) │ └── example/ │ └── index.ts # Example service ├── .env # Environment variables └── package.json

Adding New Services

Create a new service directory in mcp/:

// mcp/myservice/index.ts import { Tool, SchemaConstraint } from "@leanmcp/core"; // Define input schema class MyToolInput { @SchemaConstraint({ description: "Message to process", minLength: 1 }) message!: string; } export class MyService { @Tool({ description: "My awesome tool", inputClass: MyToolInput }) async myTool(input: MyToolInput) { return { content: [{ type: "text", text: `You said: ${input.message}` }] }; } }

Services are automatically discovered and registered - no need to modify main.ts!

Adding UI Components

Use @UIApp decorator to link tools to React components:

// mcp/products/index.ts import { Tool } from "@leanmcp/core"; import { UIApp } from "@leanmcp/ui"; export class ProductsService { @Tool({ description: "List products" }) @UIApp({ component: "./ProductsDashboard" }) async listProducts() { return { products: [...] }; } }

// mcp/products/ProductsDashboard.tsx import { ToolDataGrid, RequireConnection } from "@leanmcp/ui"; export function ProductsDashboard() { return ( <RequireConnection loading={<div>Loading...</div>}> <ToolDataGrid toolName="listProducts" columns={[...]} /> </RequireConnection> ); }

The CLI automatically builds UI components and wraps them with AppProvider.

Features

Zero-config auto-discovery - Services automatically registered from ./mcp directory
Type-safe decorators - @Tool, @Prompt, @Resource with full TypeScript support
Schema validation - Automatic input validation with @SchemaConstraint
HTTP transport - Production-ready HTTP server with session management
Hot reload - Development mode with automatic restart on file changes
UI Components - React UI components with @UIApp decorator