GitHub - quarkiverse/quarkus-mcp-server: This extension enables developers to implement the MCP server features easily. (original) (raw)

Quarkus MCP Server

This Quarkus extension provides both declarative and programmatic APIs that enable developers to easily implement MCP1 server features.

Note

The LangChain4j project provides the MCP client functionality, either as a low-level programmatic API or as a full-fledged integration into AI-infused applications.

Get Started

Step #1

Add the following dependency to your POM file:

Note

This dependency includes both the legacy "HTTP/SSE" and the "Streamable HTTP" transport. Use the quarkus-mcp-server-stdio artifactId if you want to use the STDIO transport instead. See also the Supported transports section in the docs for more information.

Step #2

Add server features (prompts, resources and tools) represented by annotated business methods of CDI beans.

import jakarta.inject.Inject;

import java.io.IOException; import java.nio.file.Files; import java.nio.file.Path;

import io.quarkiverse.mcp.server.BlobResourceContents; import io.quarkiverse.mcp.server.Prompt; import io.quarkiverse.mcp.server.PromptArg; import io.quarkiverse.mcp.server.PromptMessage; import io.quarkiverse.mcp.server.Resource; import io.quarkiverse.mcp.server.TextContent; import io.quarkiverse.mcp.server.Tool;

// This class is automatically registered as a @Singleton CDI bean public class MyServerFeatures {

@Inject
CodeService codeService;

@Tool(description = "Converts the string value to lower case")
String toLowerCase(String value) {
    return value.toLowerCase();
}

@Prompt(name = "code_assist")
PromptMessage codeAssist(@PromptArg(name = "lang") String language) {
    return PromptMessage.withUserRole(new TextContent(codeService.assist(language)));
}

@Resource(uri = "file:///project/alpha")
BlobResourceContents alpha(RequestUri uri) throws IOException{
    return BlobResourceContents.create(uri.value(), Files.readAllBytes(Path.of("alpha.txt")));
}

}

Step #3

Run your Quarkus app and have fun!

Documentation

The full documentation is available at https://quarkiverse.github.io/quarkiverse-docs/quarkus-mcp-server/dev/index.html.

Contributors ✨

Thanks goes to these wonderful people (emoji key):

Martin Kouba💻 🚧	Georgios Andrianakis💻	Max Rydahl Andersen💡	Rostislav Svoboda💻	George Gastaldi🚇	Jan Martiska📖	Ioannis Canellos💻
Sergey Beryozkin💡	Konstantin Pavlov⚠️ 🚇	Martijn van Duijnhoven💻 ⚠️ 📖	Pierre Beitz💻 ⚠️	Matthieu Recouly📖	Willem Jan Glerum🚇

This project follows the all-contributors specification. Contributions of any kind welcome!

1. "Model Context Protocol (MCP) is an open protocol that enables seamless integration between LLM applications and external data sources and tools." ↩