SSE Calculator

A stateful calculator server using Server-Sent Events (SSE) for real-time communication.

A stateful calculator server that uses Server-Sent Events (SSE) for real-time communication. This server implements the Model Context Protocol (MCP) for integration with AI assistants.

- Real-time calculator operations using SSE
- Stateful sessions for ongoing calculations
- History tracking for all calculations
- Web-based calculator interface
- MCP integration for AI assistants

The server is built using NestJS and implements the following components:

- Session Service: Manages calculator sessions and state
- Calculator Service: Performs calculation operations
- SSE Controller: Handles client connections and event streaming

- Node.js (v14 or higher)
- npm (v6 or higher)
- Clone the repository
- Install dependencies:
- Open the calculator interface in your browser:

Establishes an SSE connection and creates a new calculator session.

Performs a calculation operation on the specified session.

{ "operation": "add", // add, subtract, multiply, divide, clear "a": 5, "b": 3 }

Retrieves the calculation history for the specified session.

Retrieves all active calculator sessions.

To use this server as an MCP server, add the following configuration to your MCP settings file:

{ "mcpServers": { "remote-calculator": { "url": "http://localhost:3000/calculator/stream", "disabled": false, "alwaysAllow": [], "timeout": 60 } } }

For production deployment, you can use the following options:
-

Docker: A Dockerfile is provided for containerized deployment

- SeeDockerfileanddocker-compose.ymlfor configuration

Smithery.ai: Deploy directly from GitHub

- SeeSMITHERY_DEPLOYMENT.mdfor detailed instructions
- Configuration provided insmithery.json

Heroku/DigitalOcean: Cloud platform deployment

- SeeDEPLOYMENT.mdfor step-by-step instructions

Self-hosted: Use NGINX or similar for SSL termination and load balancing

After deploying your server, update your MCP client configuration to point to your hosted URL:

{ "mcpServers": { "remote-calculator": { "url": "https://your-deployed-url.com/calculator/stream", "disabled": false, "alwaysAllow": [], "timeout": 60 } } }

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