Timeline
- 7.5
Coinbase Unveils AiFi for AI Agent Payments After $100M in x402 Transactions
Coinbase launched AiFi, a full financial stack for AI agents covering trading, payments, and developer infrastructure, built on the x402 protocol and the Base network. The announcement follows over $100 million in transactions processed through x402. This move by a major exchange validates the emerging AI-crypto payments niche and could establish standards for autonomous machine payments. AiFi positions Coinbase to capture infrastructure value as AI agents begin to hold funds and transact on-chain. AiFi spans trading, payments, and developer infrastructure, and is built on x402 and Base, with USDC as a key settlement asset. The x402 protocol is backed by the Linux Foundation and enables instant stablecoin payments directly over HTTP requests.
- 7.5
Coinbase and 14 other x402 facilitators failed security tests built for the coming AI-agent economy
Researchers testing 15 major x402 payment facilitators at the USENIX Security Symposium found that every platform, including Coinbase, Thirdweb, PayAI and Mogami, violated at least one security rule. They mapped 49 rule violations to 31 distinct vulnerabilities across systems handling 99% of observed x402 transactions and 98% of payment volume during the study. x402 is being promoted as infrastructure for machine-driven commerce, allowing AI agents to autonomously pay for services, yet these flaws could leave merchants unpaid for goods they have already delivered and expose facilitator-held assets and network fees. The findings highlight systemic risks in the emerging AI-agent payment economy and could affect trust in stablecoin-based automated payments. Researchers identified four broad attack classes (free shopping, asset theft, service disruption, and gas abuse) and directly validated six attack paths, including two free-shopping attacks, three gas-abuse attacks, and one path that could expose facilitator-held assets via malicious ERC-6492 metadata. They also analyzed 119 million x402 transactions on Base and Solana, finding facilitators spent about $202,000 on network fees, including roughly $5,800 on reverted or failed Base transactions.