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# Quarkus MCP Server
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[](#contributors-)
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[](https://central.sonatype.com/artifact/io.quarkiverse.mcp/quarkus-mcp-server-parent)
This Quarkus extension provides both declarative and programmatic APIs that enable developers to easily implement [MCP](https://modelcontextprotocol.io/)[^1] server features.
[^1]: _"[Model Context Protocol](https://modelcontextprotocol.io/) (MCP) is an open protocol that enables seamless integration between LLM applications and external data sources and tools."_
> [!NOTE]
> The [LangChain4j](https://github.com/langchain4j/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:
```xml
<dependency>
<groupId>io.quarkiverse.mcp</groupId>
<artifactId>quarkus-mcp-server-http</artifactId>
<version>${quarkus-mcp-server-version}</version>
</dependency>
```
> [!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](https://docs.quarkiverse.io/quarkus-mcp-server/dev/#_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.
```java
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](https://allcontributors.org/docs/en/emoji-key)):
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<td align="center" valign="top" width="14.28%"><a href="https://github.com/mkouba"><img src="https://avatars.githubusercontent.com/u/913004?v=4?s=100" width="100px;" alt="Martin Kouba"/><br /><sub><b>Martin Kouba</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=mkouba" title="Code">💻</a> <a href="#maintenance-mkouba" title="Maintenance">🚧</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/geoand"><img src="https://avatars.githubusercontent.com/u/4374975?v=4?s=100" width="100px;" alt="Georgios Andrianakis"/><br /><sub><b>Georgios Andrianakis</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=geoand" title="Code">💻</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://xam.dk"><img src="https://avatars.githubusercontent.com/u/54129?v=4?s=100" width="100px;" alt="Max Rydahl Andersen"/><br /><sub><b>Max Rydahl Andersen</b></sub></a><br /><a href="#example-maxandersen" title="Examples">💡</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://twitter.com/r_svoboda"><img src="https://avatars.githubusercontent.com/u/925259?v=4?s=100" width="100px;" alt="Rostislav Svoboda"/><br /><sub><b>Rostislav Svoboda</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=rsvoboda" title="Code">💻</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/gastaldi"><img src="https://avatars.githubusercontent.com/u/54133?v=4?s=100" width="100px;" alt="George Gastaldi"/><br /><sub><b>George Gastaldi</b></sub></a><br /><a href="#infra-gastaldi" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/jmartisk"><img src="https://avatars.githubusercontent.com/u/937315?v=4?s=100" width="100px;" alt="Jan Martiska"/><br /><sub><b>Jan Martiska</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=jmartisk" title="Documentation">📖</a></td>
<td align="center" valign="top" width="14.28%"><a href="http://iocanel.com"><img src="https://avatars.githubusercontent.com/u/402008?v=4?s=100" width="100px;" alt="Ioannis Canellos"/><br /><sub><b>Ioannis Canellos</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=iocanel" title="Code">💻</a></td>
</tr>
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<td align="center" valign="top" width="14.28%"><a href="https://github.com/sberyozkin"><img src="https://avatars.githubusercontent.com/u/467639?v=4?s=100" width="100px;" alt="Sergey Beryozkin"/><br /><sub><b>Sergey Beryozkin</b></sub></a><br /><a href="#example-sberyozkin" title="Examples">💡</a></td>
<td align="center" valign="top" width="14.28%"><a href="http://kpavlov.me"><img src="https://avatars.githubusercontent.com/u/1517853?v=4?s=100" width="100px;" alt="Konstantin Pavlov"/><br /><sub><b>Konstantin Pavlov</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=kpavlov" title="Tests">⚠️</a> <a href="#infra-kpavlov" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/mvduijnhoven"><img src="https://avatars.githubusercontent.com/u/16058040?v=4?s=100" width="100px;" alt="Martijn van Duijnhoven"/><br /><sub><b>Martijn van Duijnhoven</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=mvduijnhoven" title="Code">💻</a> <a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=mvduijnhoven" title="Tests">⚠️</a> <a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=mvduijnhoven" title="Documentation">📖</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/PierreBtz"><img src="https://avatars.githubusercontent.com/u/9881659?v=4?s=100" width="100px;" alt="Pierre Beitz"/><br /><sub><b>Pierre Beitz</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=PierreBtz" title="Code">💻</a> <a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=PierreBtz" title="Tests">⚠️</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/mrecouly"><img src="https://avatars.githubusercontent.com/u/583648?v=4?s=100" width="100px;" alt="Matthieu Recouly"/><br /><sub><b>Matthieu Recouly</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=mrecouly" title="Documentation">📖</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://wjglerum.nl"><img src="https://avatars.githubusercontent.com/u/7404187?v=4?s=100" width="100px;" alt="Willem Jan Glerum"/><br /><sub><b>Willem Jan Glerum</b></sub></a><br /><a href="#infra-wjglerum" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
<td align="center" valign="top" width="14.28%"><a href="https://github.com/SaSteffen"><img src="https://avatars.githubusercontent.com/u/93011641?v=4?s=100" width="100px;" alt="Sascha Steffen"/><br /><sub><b>Sascha Steffen</b></sub></a><br /><a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=SaSteffen" title="Code">💻</a> <a href="https://github.com/quarkiverse/quarkus-mcp-server/commits?author=SaSteffen" title="Tests">⚠️</a></td>
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This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
