NFT Metadata Enrichment

import { createWalletClient } from "@circle-fin/arc-sdk"

const wallet = await createWalletClient({ network: "arc" })
const agentPassport = "erc8004:arc:agt_01"
const memo = {
  invoiceId: "inv_api_16_001",
  apiId: "api_16",
  purpose: "x402_api_payment"
}

// x402 handles payment automatically
const res = await fetch("https://api.metasync.io/v2/nft", {
  headers: {
    "x-agent-passport": agentPassport,
    "x-arc-memo": JSON.stringify(memo),
    "x-payment-token": await wallet.signPayment({
      amount: "0.003",
      recipient: "0xMS16...cc3d"
    })
  }
})

const data = await res.json()
// Agent now has the data — $0.0030 / request deducted