Agent Development Kit (ADK) for TypeScript

An open-source, code-first TypeScript toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

Important Links: Docs

⚠️ Unofficial Port & Experimental Status: This is an unofficial TypeScript port of the Google ADK Python library. Currently in alpha - APIs may change.

ADK TypeScript is a code-first framework for building and deploying AI agents. Optimized for Gemini but model-agnostic. Build agents like software: modular, testable, and production-ready.

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✨ Key Features

• Code-First Development: Define agents, tools, and orchestration in TypeScript. Full control, testability, and version management.

• Rich Tool Ecosystem: Pre-built tools, custom functions, OpenAPI specs. Tight Google ecosystem integration.

• Multi-Agent Systems: Compose specialized agents into scalable hierarchies.

• Deploy Anywhere: Cloud Run, Docker, or any platform. Your choice.

• Developer Tooling: CLI (npx adk), Web UI (npx adk web), graph visualization, and execution inspection.

• Native Streaming: Bidirectional streaming support via Runner.runLive and LiveRequestQueue.

• Built-in Evaluation: Test agents with .test.json datasets via npx adk eval.

🚀 Installation

Install ADK TypeScript locally in your project:

# Navigate to your project directory
mkdir my-adk-project
cd my-adk-project

# Initialize npm project (creates package.json)
npm init -y

# Install ADK TypeScript and all dependencies
npm install adk-typescript dotenv typescript @types/node @types/dotenv
# or
# yarn add adk-typescript dotenv typescript @types/node @types/dotenv

After installation, use the ADK CLI commands with npx:

# Create a new agent
npx adk create my-new-agent

# Run your agent
npx adk run my-new-agent

This approach ensures that:

• All dependencies are tracked in your package.json
• Anyone cloning your project can install everything with a single command
• Your project will work consistently across development and production environments

See the Installation Guide for more details on setting up your environment.

🎯 Quick Start Example

Here's a simple weather agent to get you started:

// agent.ts
import { LlmAgent } from 'adk-typescript/agents';
import { ToolContext, FunctionTool } from 'adk-typescript/tools';
import { runAgent } from 'adk-typescript';

// Define a tool function - receives params as an object
async function getWeather(
  params: Record<string, any>,
  context: ToolContext
): Promise<{ temperature: string; condition: string }> {
  const city = params.city; // Extract city from params
  // Your weather API logic here
  return {
    temperature: '72°F',
    condition: 'Sunny'
  };
}

// Create a tool with explicit function declaration
const getWeatherTool = new FunctionTool({
  name: 'getWeather',
  description: 'Get current weather for a city',
  fn: getWeather,
  functionDeclaration: {
    name: 'getWeather',
    description: 'Get current weather for a city',
    parameters: {
      type: 'object',
      properties: {
        city: {
          type: 'string',
          description: 'Name of the city'
        }
      },
      required: ['city']
    }
  }
});

// Create your agent
export const rootAgent = new LlmAgent({
  name: 'weather_agent',
  model: 'gemini-2.0-flash',
  description: 'A helpful weather assistant',
  instruction: 'You help users get weather information. Use the getWeather tool when asked about weather.',
  tools: [getWeatherTool],
});

// Run programmatically (optional)
if (require.main === module) {
  runAgent(rootAgent).catch(console.error);
}

Run your agent:

# Via CLI (interactive chat)
npx adk run .

# Or run directly with Node/ts-node
npx ts-node agent.ts

📚 Documentation

Our TypeScript-specific documentation is available at https://njraladdin.github.io/adk-typescript/.

Please be aware that the documentation is a work in progress and may not be perfectly accurate yet. For conceptual information, you may still refer to the official Python ADK documentation, but be aware of implementation differences.

⚙️ Using the CLI (npx adk)

The ADK TypeScript CLI provides commands to manage and run your agents:

1. Create a New Agent Project:

Generates a starter agent template with necessary files (agent.ts, package.json, tsconfig.json, .env).

npx adk create <your-agent-name>
# Example: npx adk create my_weather_agent

Follow the interactive prompts to configure the model and backend.

2. Run an Agent Interactively (Terminal):

Starts a command-line chat interface to interact with your agent.

# Navigate to the parent directory of your agent folder
npx adk run <your_agent_folder_name>
# Example: npx adk run my_weather_agent

# Or navigate into the agent folder and run:
cd my_weather_agent
npx adk run .

3. Run the Development Web UI:

Starts a local web server with a chat UI for testing and inspecting agent behavior.

# Navigate to the parent directory of your agent folder(s)
npx adk web <your_agent_folder_name>
# Example: npx adk web my_weather_agent

# Or run from inside the agent folder:
cd my_weather_agent
npx adk web .

Access the UI in your browser (usually http://localhost:3000).

4. Run the API Server:

Starts a local Express.js server exposing REST endpoints to interact with your agent(s) programmatically. Useful for integration testing.

# Navigate to the parent directory of your agent folder(s)
npx adk api_server --agent_dir <your_agent_folder_name_or_parent_dir>
# Example (serving one agent): npx adk api_server --agent_dir my_weather_agent
# Example (serving all agents in current dir): npx adk api_server --agent_dir .

5. Evaluate an Agent:

Runs evaluations based on predefined datasets (.test.json files).

npx adk eval <path_to_agent_folder> <path_to_eval_set.test.json>
# Example:
# npx adk eval ./my_weather_agent ./my_weather_agent/eval_data.test.json

6. Generate Agent Graph:

Creates a visual representation of your agent and its tools/sub-agents (requires Graphviz installed).

npx adk graph <path_to_agent_folder> --output graph.png
# Example: npx adk graph ./my_weather_agent --output weather_agent_graph.png

7. Deploy to Cloud Run:

Packages and deploys your agent to Google Cloud Run.

npx adk deploy cloud_run <path_to_agent_folder> --project <your-gcp-project> --region <gcp-region> --service_name <your-service-name>

🤝 Contributing

Contributions welcome! This is a community-driven port. Bug reports, features, docs, and code all appreciated. See Contributing Guidelines.

📄 License

This project is licensed under the Apache 2.0 License - see the LICENSE file for details.

Preview

This software (ADK TypeScript Port) is currently experimental (alpha) and not an officially supported Google product. It 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.

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Happy Agent Building with TypeScript!