Solana just posted its biggest week yet for x402, with daily payout volume hitting an all-time high of around $380,000 on Sunday and growing nearly 750% week over week.

The latest activity elevates Solana to the most active network by dollar transaction volume, demonstrating how quickly the narrative of AI agent payments is turning into a measurable on-chain flow.

The rise of x402 payments on Solana represents a turning point for the HTTP-402-based protocol, with pay-per-order stablecoin transfers now flowing through facilitators at a pace that resembles less a speculative surge and more like the early lines of machine-based ordering.

Instead of wash trading or air farming, bots and agents started hitting up Solana for actual services.

While the absolute numbers are still small compared to decentralized finance (DeFi) and trading flows, they provide a clean data point that real customers, not just speculative capital, are starting to settle recurring payments on Solana.

Related to: Why the x402 protocol didn’t die down after the PING hype, and what’s driving the second wave

Solana: When real usage appears on the chain

What makes this week’s move even more impressive is that x402 was designed for the backend of the Internet, not for humans chasing the latest token bar.

The standard allows APIs, applications, and AI agents to respond with a 402 “Payment Required” code, settle a gas-free USDC (USDC) transfer on-chain like Solana under the hood, and then serve the content or student account that pays for it.

For Solana, becoming the busiest x402 venue reinforces the claim that low fees and high throughput are good for machine micropayments and APIs, not just memecoins and high-frequency trading.

This story is starting to emerge elsewhere in the stack as well, from developer guides showcasing x402 integrations on Solana to new partnerships with the network, like Kalshi, which aim to drive more predictive market flows and stablecoin activity on-chain, while leveraging Solana’s speed.

Related to: AI agents want to handle your cryptocurrency wallet, but is it safe?

The X402 ecosystem is expanding as more teams are integrated into projects

X402 is already being adopted by a growing number of teams in the Web3 space, from protocol extensions that add privacy and security layers across x402, to agent frameworks and AI platforms that use it for autonomous orchestration and monetization.

DeFi researcher and educator Mars DeFi commented on

This pace and breadth of adoption is why Solana’s leading week for x402 payments is so important. If the pace continues, x402 traffic could develop into a steady source of demand for Solana block space and USDC liquidity, even as other top tiers race to their own slice of the proxy economy rails.