Developers

Add USDC-to-fiat payouts in one function call.

Add cashout without becoming an exchange. One SDK call creates the Base deposit, delegates pricing, and returns the identifiers your app needs. Add Peerlytics later when you need route choice, explorer context, lifecycle reads, or agent-operated infrastructure.

Install package View starters

@usdctofiat/offramp v4.xBase mainnetMIT · ESM + CJS

One-call off-rampBase mainnet

import { useOfframp } from "@usdctofiat/offramp/react";
import { CURRENCIES, PLATFORMS } from "@usdctofiat/offramp";

function SellButton({ walletClient }) {
  const { offramp, isLoading } = useOfframp();

  return (
    <button
      disabled={isLoading}
      onClick={() =>
        offramp(walletClient, {
          amount: "100",
          platform: PLATFORMS.VENMO,
          currency: CURRENCIES.USD,
          identifier: "alice",
        })
      }
    >
      Sell 100 USDC
    </button>
  );
}

Build paths

Start with the deposit lifecycle, then add data and operations only when needed.

Wallet appsAdd the seller flow with React hooks, wallet signatures, extension recovery, policy checks, and deposits().App guide Bots and workersCreate delegated inventory from a server wallet with retries, duplicate prevention, and reconciliation.Bot guide Coding agentsGive agents the skill, llms.txt, and starters so they ship the one-call path before adding data.Agent guide Peerlytics data layerAdd route planning, public take links, explorer context, API credits, x402, deposits, and intents.Peerlytics SDK

SDK surface

Keep product code close to the real actions: create, list, close, restrict, observe.

@usdctofiat/offramp SDK App integrations Base App integration Bot integrations Agent integrations Private OTC in code Peerlytics API Base Builder Code setup

Developer questions

Does the SDK custody keys?

No. The SDK signs with the viem WalletClient you pass: your user's wallet, a server wallet, or a bot wallet. It never holds private keys.

Does the SDK move fiat?

No. Fiat moves directly between the buyer and seller on the chosen payment app. The SDK only handles the onchain USDC and deposit lifecycle.

Do I need an API key to create deposits?

No. Creating deposits is permissionless, since your wallet signs. An API key is only needed when you use the Peerlytics API.

How do I test an integration?

There is no public sandbox; the SDK targets Base mainnet, so a test deposit is real and discoverable on the open orderbook. Use the 1 USDC minimum, and either restrict it as an OTC deposit (pass otcTaker so only your own wallet can fill it) or accept that a buyer could take it before you call close(). Confirm it onchain and via deposits(), then close() it.