Daily brief

August 5, 2026

3 stories curated for this day.

Circle described an experiment in which eight builder-run "Steve" reference agents used Circle Agent Stack and USDC to buy API services and place live Polymarket predictions; wider release was still forthcoming. Sources: circle (opens in a new tab)
Circle announces BlackRock, DTCC, Standard Chartered, and Visa as founding validators for its Arc blockchain network ahead of its September mainnet launch. Sources: finextra (opens in a new tab)
Western Union has launched a digital wallet and a stablecoin-backed Visa secured credit card for global use. Sources: finextra (opens in a new tab)