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., "@Simple MCP POCread the contents of notes.txt"
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.
Simple MCP POC
A simple Model Context Protocol (MCP) server that exposes tools for:
Reading local files
Performing basic arithmetic operations
This project is intended as a proof of concept (POC) to understand how MCP servers work and how tools are exposed to clients.
Prerequisites
Node.js v18 or higher
npm (comes with Node.js)
node -v npm -v
Running the Server
Start the MCP server using standard I/O (stdio):
The server will start and wait for JSON-RPC messages on stdin/stdout.
Testing with MCP Inspector
The easiest way to test the server is using the MCP Inspector tool.
Windows (PowerShell)
macOS / Linux
After running, open your browser to http://localhost:6274 to interact with the tools.
Available Tools
The server exposes two tools:
1. read_file
Reads the content of a local text file.
Arguments:
path(string): The relative or absolute path to the file.
Example usage:
2. calculator
Performs basic arithmetic operations.
Arguments:
a(number): First operandb(number): Second operandoperation(string): One ofadd,subtract,multiply,divide
Example usage:
Manual Testing (JSON-RPC)
You can also test the server by sending raw JSON-RPC messages to the running server process.
Example: Read