Provides a JavaScript SDK for implementing the Model Context Protocol, allowing developers to build MCP servers using JavaScript
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@MCP JavaScript Servershow me how to define a new tool with parameters"
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.
MCP Server - JavaScript SDK
This is an unofficial JavaScript SDK for Model Context Protocol.
Usage
Import the package to your project:
npm install mcp-js-serverCreate files to define the server's prompts, resources, and tools. See mcp-clever-demo, or the examples below:
Prompts
// prompts.js
export const prompts = {
hello_world: {
description: 'A simple prompt that says hello.',
arguments: [],
messages: [{
role: 'assistant',
content: {
type: 'text',
text: 'Hello, world!'
}
}]
}
};Resources
// resources.js
export const resources = {
apiReference: {
uri: 'https://api.example.com/openapi.json',
mimeType: 'application/json'
}
};Tools
// tools.js
export const tools = {
simple_tool: {
description: 'A simple tool',
handler: async () => new Date().toLocaleString(),
schema: {
type: 'object',
properties: {},
required: []
}
},
complex_tool: {
description: 'A complex tool',
handler: async ({ param1, param2 }) => {
return `param1: ${param1}, param2: ${param2}`;
},
schema: {
type: 'object',
properties: {
param1: { type: 'string' },
param2: { type: 'string' }
},
required: ['param1', 'param2']
}
}
};Server
Then create a server instance with the following code:
// server.js
import { MCP } from 'mcp-server';
import { tools } from './tools.js';
import { prompts } from './prompts.js';
import { resources } from './resources.js';
const infos = {
name: 'mcp-demo-server',
version: '0.1.0'
};
const server = new MCP(infos, prompts, resources, tools);Debugging
You can find logs of the server in your user system logs directory:
Linux: ~/.local/share/logs
macOS: ~/Library/Logs
Windows: %USERPROFILE%\AppData\Local\LogsThis server cannot be installed
Resources
Looking for Admin?
Admins can modify the Dockerfile, update the server description, and track usage metrics. If you are the server author, to access the admin panel.