Building AI Agents with Next.js

Next.js, with its App Router and Server Actions, provides a fantastic backend for building AI agents.

The Concept

An AI agent requires:

1. Memory (Contextual state)
2. Tools (Functions it can execute)
3. Execution Loop (The ability to observe, think, and act)

Using the Google Gen AI SDK

You can orchestrate an agent by defining functions on your server and passing them to the model as tools.

import { GoogleGenAI } from "@google/genai";

const ai = new GoogleGenAI({ apiKey: process.env.GEMINI_API_KEY });

// The tool definition
const fetchWeatherTool = {
  name: "getWeather",
  description: "Fetches current weather for a specific city.",
  parameters: {
    type: "object",
    properties: { city: { type: "string" } }
  }
};

By utilizing Next.js React Server Components, you can stream the agent's thought processes directly to the client interface cleanly, resulting in highly dynamic AI-driven web apps.