Coinbase has added Sei to its x402 protocol, allowing instant stablecoin payments over HTTP. The protocol is built on the HTTP 402 “Payment Required” status code and lets APIs, apps, and AI agents settle transactions without wallets or intermediaries.
With Sei’s integration, developers can embed payment logic directly into services. That opens the door for instant monetization models — from charging per API request to enabling AI assistants to process blockchain transactions in real time.
Why SEI fits the x402 model
Sei’s network runs on 0.5-second block times and handles over 65 transactions per second. Combined with low fees and parallelized execution, it provides the speed and cost efficiency needed for high-volume micropayments.
The upgrade makes stablecoins the centerpiece of internet-native value transfer, while giving AI-driven applications a reliable way to interact with blockchain rails.
The SEI token is trading at $0.33, up 5.81% over the past week. Its market capitalization has grown to $2 billion, reflecting a 10.5% increase.
Total value locked (TVL) on Sei slipped to $615 million, down 3.3% on the week. On the activity side, daily average transactions across Sei’s EVM dropped to 2.2 million, a 12% decline. Daily active users also fell by 10.2% to 849,900.
The number of wallets registered on Sei decreased by 6.7% to 54.19 million. Real-time transactions per second averaged 65.49, marking a 7% drop, while block times slowed slightly to 0.5 seconds, down 3.85%.
Despite these declines, unique active wallets on Sei grew by 7.86% to 5.01 million — the highest across EVM chains. Dapp-related transactions also climbed 6.46% to 14.23 million, showing continued momentum in the network’s ecosystem.
Growing activity across Sei Network
Sei’s ecosystem continues to expand with momentum across DeFi and gaming. MetaMask recently added a dedicated tab for Sei’s gaming hub, while DragonSwap surpassed $3 billion in trading volume. On the lending side, Takara Lend reached an all-time high of $148 million in deposits, and Yei Finance recorded a 54% monthly increase in borrowing to $579 million.
This activity underscores the bigger picture: the Coinbase-Sei partnership reflects a broader push toward blockchain-powered payments at internet scale. As stablecoin regulation advances, protocols like x402 could accelerate adoption across APIs, AI-driven economies, and digital services — positioning Sei as a critical layer in the future of stablecoin infrastructure.
