x402 tokens have experienced a significant surge in popularity in October 2025, fueled by the AI agent wave and the establishment of the x402 Foundation by Coinbase and Cloudflare. The x402 protocol facilitates automated, trustless payments for AI agents using stablecoins, and has seen 1.38 million transactions and $1.48 million in volume since May. The x402 category on CoinGecko reached nearly $800 million in market cap following a 350% increase in just 24 hours. The rapid rise of x402 tokens has sparked debate among experts. While some see the protocol as a transformative force for internet business models, others caution against speculative hype and potential security risks. The contrasting views highlight the ongoing tension between innovation and market stability in the rapidly evolving crypto landscape.