Build an AI Agent with Onchain Data

const response = await anthropic.messages.create({
  model: "claude-sonnet-4-20250514",
  messages: [{ role: "user", content: userMessage }],
  tools: tools.map((t) => ({
    name: t.function.name,
    description: t.function.description,
    input_schema: t.function.parameters,
  })),
});

import { tool } from "@langchain/core/tools";
import { z } from "zod";

const portfolioTool = tool(
  async ({ address }) => JSON.stringify(await getWalletPortfolio(address)),
  {
    name: "getWalletPortfolio",
    description: "Get portfolio value and chain breakdown",
    schema: z.object({ address: z.string() }),
  }
);

import { tool } from "ai";
import { z } from "zod";

const walletTool = tool({
  description: "Get portfolio value and chain breakdown",
  parameters: z.object({ address: z.string() }),
  execute: async ({ address }) => getWalletPortfolio(address),
});