Simple MCP
A simple TypeScript library for creating MCP (Model Context Protocol) servers.
Features
- Simple API: Create MCP servers with minimal code
- Type Safety: Full TypeScript integration
- Parameter Validation: Built-in validation with Zod
- MCP Compatible: Fully implements the Model Context Protocol
Installation
npm install simple-mcp
Quickstart
import { McpServer } from 'simple-mcp';
import { z } from 'zod';
// Create a server instance
const server = new McpServer({ name: 'my-server' });
// Register the tool with the server
server.tool({
name: 'greet',
parameters: {
name: z.string().describe('Person\'s name')
},
execute: async ({ name }) => {
return {
content: [
{
type: 'text',
text: `Hello, ${name}! Nice to meet you.`
}
]
};
}
});
// Start the server
server.start({ transportType: 'stdio' });
Class-based Implementation
You can also implement MCP tools using classes:
import { McpServer, type McpTool } from 'simple-mcp';
import { z, ZodObject } from 'zod';
const parameters = {
name: z.string().describe('The name is required'),
};
class GreetTool implements McpTool<typeof parameters> {
public readonly name = 'greet';
public readonly parameters = parameters;
public async execute({ name }: z.infer<ZodObject<typeof this.parameters>>) {
return {
content: [
{
type: 'text',
text: `Hello, ${name}! Nice to meet you.`,
},
],
};
}
}
// Initialize a new MCP server with the name 'greet-server'
const server = new McpServer({ name: 'greet-server' });
// Create an instance of the GreetTool class
const greetTool = new GreetTool();
// Register the tool with the server
server.tool(greetTool);
// Start the server using stdio as the transport method
server.start({ transportType: 'stdio' });
Examples
Check out the examples directory for more complete examples:
- Greeting Tool - Simple greeting example
- Calculator Tool - Mathematical operations example
Contributing
Contributions are welcome! Feel free to open issues or submit pull requests.