How to Create AI Agents in TypeScript with Google’s ADK

Want to create intelligent AI agents without the usual complexity of managing state, tools, memory, and LLM calls? Google’s Agent Development Kit (ADK) for TypeScript makes it straightforward and code-first.

ADK is an open-source, modular framework that lets TypeScript and JavaScript developers build, test, and deploy AI agents quickly. You define agents using clean TypeScript classes like LlmAgent, equip them with tools (custom functions, Google Search, or third-party integrations), and let the framework handle the reasoning loop, function calling, and responses.

Create an agent with a model (such as Gemini), clear instructions, and tools defined with Zod schemas for type safety. Run it via CLI (npx adk run) or the built-in web UI for interactive debugging and streaming responses.

The framework supports single agents, multi-agent systems, workflow agents for deterministic flows, and conversational session management. You can build everything from a science tutor to a customer-service agent that checks order status—all with type-safe code.

Whether you’re prototyping or preparing for production, ADK removes the boilerplate so you can focus on what your agent should actually do.