Tether USDT Reaches 170M Brazilian PIX Users; Circle Publishes USDC Crosschain Agent Payment Spec

Oobit, backed by Tether, integrated USDT into Brazil's PIX payment network, reaching approximately 170 million users. Circle published an official USDC specification for a machine payments protocol enabling crosschain agent-to-agent commerce. Opera's MiniPay separately launched a Visa debit card linked to stablecoin balances for real-world spending.