Provides example implementations and source code through GitHub repositories.
Available as an npm package for easy installation in Node.js projects.
Provides full TypeScript integration with type safety for creating MCP servers.
Implements built-in parameter validation using Zod schemas for MCP tools.
Click on "Deploy 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., "@MCPKit create a greeting tool that accepts a name parameter"
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.
A simple TypeScript library for creating MCP (Model Context Protocol) servers.
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
Related MCP server: easy-mcp
npm install simple-mcpimport { 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' });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' });Check out the examples directory for more complete examples:
Greeting Tool - Simple greeting example
Calculator Tool - Mathematical operations example
Contributions are welcome! Feel free to open issues or submit pull requests.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Tool has no description.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Tool has no description.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Tool has no description.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Tool has no description.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Tool has no description.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Tool has no description.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
greetScored across 1 tool
With only one tool in the server, there is no possibility of overlap or confusion between tools. The agent does not need to distinguish competing operations.
The single tool name 'greet' uses a clear lowercase verb with no conflicting naming style. However, one tool is too few to establish a meaningful naming pattern across a server.
A server named MCPKit containing only one trivial tool is severely underprovisioned. This tool count earns no place in a coherent server surface.
The only tool, 'greet', provides a trivial single action with no description and no supporting operations. The server surface is severely incomplete for any plausible broader purpose.
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