Google ADK Adapter

npm install agent402-google-adk @google/adk zod

import { agent402Tools } from "agent402-google-adk";
import { LlmAgent } from "@google/adk";

const tools = await agent402Tools();   // free tier: proof-of-work, no wallet

const agent = new LlmAgent({
  name: "x402-agent",
  model: "gemini-3.6-flash",
  tools,
  instruction: "Use agent402_find to discover the right tool, then agent402_call to invoke it.",
});

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const payClient = new x402Client();
registerExactEvmScheme(payClient, { signer: privateKeyToAccount(process.env.AGENT_KEY) });
const payFetch = wrapFetchWithPayment(fetch, payClient);

// agent402_call pays wallet-only tools through this fetch
const tools = await agent402Tools({ fetch: payFetch });

// A payment-wrapped fetch (@x402/fetch for x402, mppx for MPP) that agent402_call uses for wallet-only tools.
agent402Tools({ fetch: payFetch })

// The plain fetch used for the unpaid lookups (find, route, about) and proof-of-work calls. Defaults to the global fetch.
agent402Tools({ fetchImpl: globalThis.fetch })

// Point to a self-hosted Agent402 instance.
agent402Tools({ baseUrl: "https://my-agent402.example.com" })