quarkus-mcp-server
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The Quarkus Model Context Protocol (MCP) Server is an extension that provides APIs for implementing MCP server features, enabling seamless integration between LLM applications and external data sources and tools.
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:
<dependency>
<groupId>io.quarkiverse.mcp</groupId>
<!-- use 'quarkus-mcp-server-stdio' if you want to use the STDIO transport instead of the HTTP/SSE transport -->
<artifactId>quarkus-mcp-server-sse</artifactId>
<version>${project-version}</version>
</dependency>
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.Tool;
import io.quarkiverse.mcp.server.Resource;
import io.quarkiverse.mcp.server.TextContent;
// This class is automatically registered as a @Singleton CDI bean
public class ServerFeatures {
@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 💻 ⚠️ 📖 |
This project follows the all-contributors specification. Contributions of any kind welcome!
Footnotes
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"Model Context Protocol (MCP) is an open protocol that enables seamless integration between LLM applications and external data sources and tools." ↩
