clima-info-unlp-mcp by juliancasaburi - MCP Server

Facultad de Informática UNLP Weather Station MCP Server

A Model Context Protocol (MCP) server that provides access to real-time weather data from the weather station at the Facultad de Informática, Universidad Nacional de La Plata (UNLP), in La Plata, Argentina.

Overview

This MCP server connects to the Facultad de Informática's weather station and provides tools to access current weather conditions including temperature, humidity, pressure, wind data, UV index, and precipitation information. Data is sourced from the Facultad de Informática UNLP weather station platform at clima.info.unlp.edu.ar.

For more information about the weather station, see: https://www.info.unlp.edu.ar/estacion/

Features

Available Tools

get_current_weather - Get comprehensive current weather conditions
get_temperature - Get current temperature and feels-like temperature
get_weather_parameter - Get specific weather parameters:
- temperature, humidity, pressure, wind_speed, wind_direction
- uv, rain, rain_rate, dew_point, wind_chill
analyze_weather_conditions - Get intelligent analysis of current weather conditions

Data Source

The server fetches data from: https://clima.info.unlp.edu.ar/last?lang=es

Sample data format:

{
  "captured_at": "2025-09-18T02:55:00.000Z",
  "temperature": 15,
  "humidity": 87,
  "dew": 13,
  "bar": 1017,
  "uv": 0,
  "wind_chill": 15,
  "wind_speed": 0,
  "rain": 0,
  "rain_rate": 0,
  "wind_direction": "---"
}

Installation & Deployment

This MCP server supports both local and AWS Lambda deployment.

Local Deployment

flowchart LR
    subgraph "Your Laptop"
        Host["Desktop Application<br>with MCP Clients"]
        S1["MCP Server A<br>(child process)"]
        S2["MCP Server B<br>(child process)"]
        Host <-->|"MCP Protocol<br>(over stdio stream)"| S1
        Host <-->|"MCP Protocol<br>(over stdio stream)"| S2
    end

# Clone and install
git clone https://github.com/juliancasaburi/clima-info-unlp-mcp.git
cd clima-info-unlp-mcp
npm install

# Build and run
npm run build
npm start

AWS Lambda Deployment

flowchart LR
    App["MCP Client"]
    T1["MCP Server<br>(Lambda function)"]
    T2["API Gateway"]
    App -->|"MCP Streamable<br>HTTP Transport"| T2
    T2 -->|"Invoke"| T1

Deploy to AWS Lambda with API Gateway:

Option 1: CDK Deployment

# Build and package
npm run build
npm run package

# Deploy with CDK
npx cdk bootstrap aws://YOUR_ACCOUNT/us-east-1  # One-time setup
npx cdk deploy --app "npx tsx cdk-stack.ts"

Option 2: CloudFormation Deployment

# Deploy with CloudFormation
npm run deploy:cloudformation

This will:

Build and package the application
Create/update an S3 bucket for deployment artifacts
Upload the package to S3
Deploy the CloudFormation stack
Display the API Gateway endpoint URL

Usage

VS Code Integration

Configure in .vscode/mcp.json:

{
  "servers": {
    "clima-info-unlp-mcp-local": {
      "type": "stdio",
      "command": "node",
      "args": ["${workspaceFolder}/build/index.js"]
    },
    "clima-info-unlp-mcp-aws": {
      "type": "http",
      "url": "https://clima-info-unlp-mcp.casaburi.dev/mcp"
    }
  }
}

Claude Desktop Integration

Add to Claude Desktop configuration:

{
  "mcpServers": {
    "clima-info-unlp": {
      "command": "node",
      "args": ["/path/to/clima-info-unlp-mcp/build/index.js"]
    }
  }
}

Example Interactions

Get Current Weather

Ask: "What's the current weather at UNLP?"

Get Specific Information

Ask: "What's the current temperature at UNLP?" or "What's the humidity level?"

Weather Analysis

Ask: "Analyze the current weather conditions at UNLP"

Development

Project Structure

src/
├── index.ts                    # Local MCP server (stdio)
├── index-lambda-subprocess.ts  # Lambda subprocess handler
├── lambda-api-gateway.ts       # API Gateway handler  
└── weather-core.ts             # Shared weather functionality

scripts/
├── package-api-gateway.cjs     # API Gateway deployment package
└── deploy-cloudformation.cjs   # CloudFormation deployment script

cdk-stack.ts                    # AWS CDK infrastructure
cloudformation-template.yaml   # CloudFormation template (alternative to CDK)

Available Scripts

npm run build - Compile TypeScript
npm start - Run local MCP server
npm run dev - Development mode with tsx
npm test - Build and test
npm test - Build and test

Deployment Scripts

npm run package - Create deployment package
npm run deploy - Package for deployment
npm run deploy:cloudformation - Deploy using CloudFormation template

Architecture

Local Mode

VS Code/Claude ↔ stdio ↔ MCP Server ↔ UNLP Weather API

AWS Lambda Mode

VS Code/Claude ↔ HTTP ↔ API Gateway ↔ Lambda (AWS Labs MCP Wrapper) ↔ MCP Server subprocess ↔ UNLP Weather API

Technical Details

Language: TypeScript
Runtime: Node.js 22.x
MCP SDK: @modelcontextprotocol/sdk v1.0.4
AWS Integration: @aws/run-mcp-servers-with-aws-lambda v0.4.2
Local Transport: stdio
Remote Transport: HTTP (AWS Labs wrapper handles MCP protocol)

Cost Considerations (AWS)

Lambda: Pay per invocation (free tier: 1M requests/month)
API Gateway: Pay per API call (free tier: 1M calls/month)
CloudWatch Logs: Small storage costs for logs
Deployment Artifacts: S3 storage costs are minimal for deployment artifacts.

Monitoring

CloudWatch Logs

View Lambda execution logs:

aws logs describe-log-groups --log-group-name-prefix "mcp-server-clima-info-unlp"

API Gateway Metrics

Monitor in AWS Console: API Gateway → Your API → Monitoring

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contributing

Contributions are welcome! Feel free to open issues or submit pull requests to improve the project.

Fork the repository
Create a feature branch
Make your changes
Submit a pull request

Support

For issues or questions:

Create an issue on GitHub
Check CloudWatch logs for AWS Lambda issues
Verify UNLP weather station availability at https://clima.info.unlp.edu.ar/