adk-python and adk-java
These are ecosystem siblings—language-specific implementations of the same Agent Development Kit framework, allowing developers to build AI agents in either Python or Java depending on their preferred language and tech stack.
About adk-python
google/adk-python
An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
Supports model-agnostic agent development with built-in integration for Gemini, MCP tools, and OpenAPI specs, plus hierarchical multi-agent orchestration where coordinator agents delegate to specialized sub-agents. Features a modular architecture enabling deployment to Cloud Run or Vertex AI Agent Engine, with a built-in development UI for testing and an evaluation framework for benchmarking agent performance. Includes session management capabilities like rewinding invocations and tool confirmation flows for human-in-the-loop control.
About adk-java
google/adk-java
An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
Supports multi-agent composition for hierarchical systems and integrates with Google Cloud services through pre-built tools and OpenAPI specs. Features a built-in development UI for testing and debugging agents locally, with A2A protocol support for remote agent-to-agent communication. Emphasizes code-first Java development for reproducible, versionable agent logic that can run from local environments to cloud deployment.
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