Proof and Circle demo AI agents proving identity and paying in USDC for trusted transactions

Proof and Circle Internet Group demonstrated a new system where AI agents can prove the identity of the person they represent using Proof's x401 open identity protocol and pay merchants in USDC via Circle's x402 payment protocol. This innovation addresses the challenge businesses face in trusting AI-driven transactions by verifying who authorized the payment and enabling real-time payments to identity providers without prior contracts. The demo at Money20/20 showed how a merchant can request verified identity and payment simultaneously, allowing secure, privacy-respecting transactions. This collaboration aims to enable businesses to accept AI agents confidently, improving the agentic economy's trust and efficiency.

Circle Internet Group's stock price is currently at USD 84.29, which is closer to its 52-week low of USD 50.23 than its high of USD 143.29, showing it trades in the lower half of its annual range as of Oct 19, 2026 20:14 WIB. The stock gained 2.52% in one day, indicating positive short-term momentum. This trading context on Pluang highlights market interest in Circle amid its innovations in AI-driven payment and identity verification.