How to pay: prepare USDC in three steps

Step 1 · Pick your route

I use an exchange app

Easiest option: buy USDC directly with fiat.

Browse exchanges

I use a self-custody wallet

More control: you hold the keys, but back up your seed phrase carefully.

Wallet starter tips

Suggested Exchanges

Binance

The world's largest cryptocurrency exchange.

Sign up

OKX

A leading global cryptocurrency exchange.

Sign up

Bitget

Top global exchange for copy trading and spot.

Sign up

Coinbase

US-based public company and compliant exchange.

Sign up

Kraken

Secure, reliable exchange established in 2011.

Sign up

Bitstamp

The oldest compliant exchange in Europe.

Sign up

Suggested Wallets

Binance Wallet

Official Web3 wallet for multi-chain assets.

Open Wallet

OKX Wallet

Powerful multi-chain wallet supporting 50+ chains.

Open Wallet

Bitget Wallet

Global multi-chain wallet for DeFi and NFT.

Open Wallet

MetaMask

The most popular browser extension wallet.

Download

Phantom

User-friendly wallet for Solana and more.

Download

Rainbow

Beautifully designed wallet for Ethereum assets.

Download

Step 2 · Add USDC (wallet route)

  1. Install a wallet app, then finish the backup and security checklist.
  2. Buy USDC with fiat or withdraw from your exchange into the wallet address.
  3. Confirm the network (e.g. Base or Ethereum mainnet) to avoid the wrong chain.

Step 3 · Return and complete the x402 payment

When the page responds with 402, follow the instructions, send the one-off payment, and the content unlocks automatically.