402 — but a challenge alone isn’t a payment. You need an agent with a funded wallet. This page gets you to that state with real USDC, using AgentCash, Circle Agent Stack, or Tempo Wallet.
1. Pick an agent environment
Set up one of these first (pick what you already use):
You need a working agent chat where you can paste a setup prompt and let it install tools.
2. Drop a wallet setup prompt
Paste one of these prompts into your agent. It will install the wallet skill, create or connect a wallet, and walk you through funding with real USDC.AgentCash
One USDC balance for x402 and MPP — broadest reach.Circle Agent Stack
Circle Agent Wallets plus nanopayments via Gateway.Tempo Wallet
MPP-native wallet with spend controls — best for Tempo / MPP paywalls.3. Fund with real USDC
Follow the agent through funding. You’re done when the wallet shows a spendable USDC balance on a network your paywalls accept (for example Base for x402, Tempo for MPP).Next
Make your first payment
Ask your agent to find a paid resource and pay for it — the aha moment.