
adk-java
An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
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Agent Development Kit (ADK) for Java is an open-source toolkit designed for developers to build, evaluate, and deploy sophisticated AI agents with flexibility and control. It allows defining agent behavior, orchestration, and tool use directly in code, enabling robust debugging, versioning, and deployment anywhere. The toolkit offers a rich tool ecosystem, code-first development approach, and support for modular multi-agent systems, making it ideal for creating advanced AI agents integrated with Google Cloud services.
README:
An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
Important Links: Docs & Samples & Python ADK.
Agent Development Kit (ADK) is designed for developers seeking fine-grained control and flexibility when building advanced AI agents that are tightly integrated with services in Google Cloud. It allows you to define agent behavior, orchestration, and tool use directly in code, enabling robust debugging, versioning, and deployment anywhere – from your laptop to the cloud.
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Rich Tool Ecosystem: Utilize pre-built tools, custom functions, OpenAPI specs, or integrate existing tools to give agents diverse capabilities, all for tight integration with the Google ecosystem.
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Code-First Development: Define agent logic, tools, and orchestration directly in Java for ultimate flexibility, testability, and versioning.
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Modular Multi-Agent Systems: Design scalable applications by composing multiple specialized agents into flexible hierarchies.
If you're using Maven, add the following to your dependencies:
<dependency>
<groupId>com.google.adk</groupId>
<artifactId>google-adk</artifactId>
<version>0.2.0</version>
</dependency>
<!-- Dev UI -->
<dependency>
<groupId>com.google.adk</groupId>
<artifactId>google-adk-dev</artifactId>
<version>0.2.0</version>
</dependency>
To instead use an unreleased version, you could use https://jitpack.io/#google/adk-java/; see https://github.com/enola-dev/LearningADK#jitpack for an example illustrating this.
For building, evaluating, and deploying agents by follow the Java documentation & samples:
import com.google.adk.agents.LlmAgent;
import com.google.adk.tools.GoogleSearchTool;
LlmAgent rootAgent = LlmAgent.builder()
.name("search_assistant")
.description("An assistant that can search the web.")
.model("gemini-2.0-flash") // Or your preferred models
.instruction("You are a helpful assistant. Answer user questions using Google Search when needed.")
.tools(new GoogleSearchTool())
.build();
Same as the beloved Python Development UI.
A built-in development UI to help you test, evaluate, debug, and showcase your agent(s).
Coming soon...
For remote agent-to-agent communication, ADK integrates with the A2A protocol. Examples coming soon...
We welcome contributions from the community! Whether it's bug reports, feature requests, documentation improvements, or code contributions, please see our Contributing Guidelines to get started.
This project is licensed under the Apache 2.0 License - see the LICENSE file for details.
This feature is subject to the "Pre-GA Offerings Terms" in the General Service Terms section of the Service Specific Terms. Pre-GA features are available "as is" and might have limited support. For more information, see the launch stage descriptions.
Happy Agent Building!
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