The x402 stablecoin payment protocol more than doubled its monthly active senders in 30 days, rising 152% to 43,100 as of mid-October, according to Token Terminal data reported by CryptoBriefing. The protocol, built on the long-dormant HTTP 402 "Payment Required" status code, is designed primarily for software: AI agents that need to buy data, compute, and API access without a human in the loop.
Highlights#
- Base carries the growth. Of the 43,100 active senders, roughly 32,000 transact on Base, Coinbase's layer-2 network, with Algorand at about 9,100 and Solana at roughly 1,600. Coinbase launched x402 in May 2025, so its home chain's lead is no accident.
- Usage is heavy and cheap. x402.org reported 75.41 million transactions over the latest 30 days, settling $24.24 million in volume. Most payments are micropayments in the $0.0001 to $0.10 range, sizes where card fees would exceed the service itself.
- The market is lopsided. The wider ecosystem counts approximately 94,060 buyers against about 22,000 sellers as of October 2026. For every participant accepting x402 payments, more than four are trying to spend.
- Settlement runs on USDC. The protocol supports dollar-pegged payments across EVM-compatible chains and Solana, and agents pay directly inside the HTTP request flow. No accounts, no API keys, no subscriptions.
- Backing runs beyond crypto. Visa, Mastercard, Stripe, Google, and AWS are among the firms supporting the protocol's infrastructure, and the x402 foundation launched under the Linux Foundation in July.
Why it matters#
Four buyers for every seller is a market with demand but thin supply, and no way for an autonomous spender to judge a counterparty it has never met. That imbalance is precisely what escrow-backed settlement and portable reputation are built to fix before agent commerce scales further.