The Linux Foundation appointed payments veteran Michael Hursta executive director of the x402 Foundation on October 1, 2026, as payment systems designed for autonomous AI agents gained attention. Foundation members reported more than 75 million agentic payment transactions in a 30-day period in September, and Coinbase and Amazon Web Services showcased production payment rails at Sibos 2026. Reported transaction counts, however, do not establish the value or commercial character of that activity. The emerging protocols address different obstacles. Coinbase’s x402 enables per-request USDC payments through HTTP, while Google’s Agent Payments Protocol uses signed mandates to connect an agent’s purchases to a user’s authorization. Stripe and Tempo have also proposed session-based billing through the Machine Payments Protocol. These approaches respond to card fees and interactive checkout checks that can impede small, automated transactions. Card networks are developing delegated-identity tools, leaving multiple potential paths for agent payments rather than a single replacement for existing rails.

AI agents can select products and initiate payments without a buyer present at checkout, forcing merchants and payment providers to verify delegated authority rather than a single approval. Google’s Agent Payments Protocol (AP2) uses signed mandates to record spending limits and connect instructions to a specific cart. Stripe and OpenAI’s Agentic Commerce Protocol and Shared Payment Tokens, alongside Mastercard’s Agentic Token framework, support checkout with restricted credentials. Visa’s Trusted Agent Protocol helps merchants identify agents, while Coinbase’s x402 enables stablecoin payments through web requests, including small API charges. These tools address different risks: signatures document permission, tokens limit payment use, and records can support disputes. But compliance with a spending cap cannot prove an agent chose what its user intended. Google transferred AP2 stewardship to the FIDO Alliance in April 2026, yet consumer deployment remains early. Merchants still face integration challenges, while liability and chargeback treatment for agent errors remain unsettled.