Google's Agent Development Kit is an Apache-2.0 framework for building and orchestrating agents. It is the most multi-language of the 2026 vendor SDKs, with official quickstarts for Python, Java, Go, TypeScript, and Kotlin. Multi-agent composition is expressed through workflow agents: SequentialAgent, ParallelAgent, and LoopAgent. It is optimized for Gemini but model-agnostic by design; the canonical docs describe the framework as designed for flexibility, allowing integration with various LLMs, with other providers reached through a model interface (LiteLLM is the documented adapter). MCP support is native and bidirectional: ADK can consume MCP servers as a client and expose its own tools through an MCP server. For open-source AI, ADK is a fully open framework from a hyperscaler, which is the pattern that defines the 2026 vendor SDKs: the framework code is open even when the default model (Gemini) is not. ADK reached 1.0 in May 2025 and 2.0 in May 2026; the 1.x line is still maintained in parallel with 2.x.
The Stack · Agents · Open source
Google ADK (Agent Development Kit)
Google's open agent framework; Apache-2.0, multi-language (Python, Java, Go, TypeScript, Kotlin), Gemini-optimized but model-agnostic, native bidirectional MCP. 2.0 GA May 2026.
Sources
- Google ADK documentation https://adk.dev/get-started/about/
- adk-python LICENSE (Apache 2.0) https://raw.githubusercontent.com/google/adk-python/main/LICENSE
- Google ADK MCP tools docs https://adk.dev/tools-custom/mcp-tools/
- Agent Development Kit launch (2025-04-09) https://developers.googleblog.com/en/agent-development-kit-easy-to-build-multi-agent-applications/
- adk-python releases (1.0, 2.0) https://github.com/google/adk-python/releases
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19 siblings · ordered open first
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