One $0.005 USDC authorization on Base. MetaMask will show typed data (TransferWithAuthorization) — not a send of your balance. You need 0 ETH; PayAI pays gas. This page never settles.
Use 0x64f2cFb8A51D132DeA6e013Ef940CA29A483d83d on Base. It has USDC; ETH is not required.
POST /v1/fetch → 402 → sign $0.005 USDC (5000 atomic, USDC on Base) → retry with PAYMENT-SIGNATURE. Cashed only after markdown comes back.
Connect MetaMask, stay on Base, then Fetch.