ModelContextProtocolClient

A Spring Boot client application that demonstrates different transport methods (WebFlux SSE, Stdio) for communicating with the MCP server.

Setup

1. Create a .env file in the root directory with your API keys:

BRAVE_SEARCH_API_KEY=your_brave_search_api_key_here
WEATHER_API_KEY=your_weather_api_key_here

2. Clone https://github.com/InnoBridge/ModelContextProtocolServer

3. Docker Setup

   1. Update volume mappings in docker-compose.yml:

    modelcontextprotocolclient_application
    ...
   volumes:
     - .:/app
     - /var/run/docker.sock:/var/run/docker.sock
     - ./local/root:/root
     - ../{path to ModelContextProtocolServer repo}:/ModelContextProtocolServer

   2. Start the Docker containers:

   sudo docker compose up

   3. Build and run the mcp server:

   # In a new terminal
   sudo docker exec -it modelcontextprotocolserver-application sh
   cd /app
   ./mvnw clean install
   ./mvnw spring-boot:run

   4. Build and run the client:

   # In another new terminal
   docker exec -it modelcontextprotocolclient-application sh
   ./mvnw spring-boot:run

Available Endpoints

WebFlux Transport

• GET /webflux/tools - List all available tools
• POST /webflux/calculate - Calculate using the calculator tool

  curl -X POST "http://localhost:8080/webflux/calculate?operation=add&a=5&b=3"

• POST /webflux/weather - Get weather information

  curl -X POST "http://localhost:8080/webflux/weather?location=San%20Francisco&format=celsius"

Stdio Transport

• GET /stdio/tools - List all available tools
• POST /stdio/calculate - Calculate using the calculator tool

  curl -X POST "http://localhost:8080/stdio/calculate?operation=add&a=5&b=3"

• POST /stdio/weather - Get weather information

  curl -X POST "http://localhost:8080/stdio/weather?location=San%20Francisco&format=celsius"

BraveSearch Transport

• GET /tools/bravesearch - List available tools
• POST /bravesearch - Perform a web search

  curl -X POST "http://localhost:8080/bravesearch?query=spring%20boot"

Configuration

The application supports multiple transport configurations:

1. WebFlux SSE Transport (default)

   • Communicates with the server using Server-Sent Events
   • Server must be running in WebFlux mode

2. Stdio Transport

   • Communicates with the server using standard input/output
   • Automatically launches the server jar in stdio mode

3. BraveSearch Transport

   • Communicates with the BraveSearch API
   • Requires BRAVE_SEARCH_API_KEY in .env file
   • Get your API key from Brave Search API

4. Weather API

   • Used by both WebFlux and Stdio transports for weather information
   • Requires WEATHER_API_KEY in .env file
   • Get your API key from WeatherAPI