Coinbase has activated support for the Sei Network on its x402 protocol, an instant-settlement system that uses the Internet’s HTTP 402 “Payment Required” standard to move stablecoins. The integration allows API providers, AI agents and other software to embed real-time payment functions without traditional wallets or intermediaries, relying on Sei’s low-fee, high-throughput blockchain to process transactions in fractions of a second. Sei’s parallelized execution is designed for high-volume micropayments, a capability Coinbase says will let content creators, businesses and autonomous AI systems charge per request for data, computing or premium content. The expansion also positions Sei to capture a share of the growing market for on-chain dollar-denominated transfers as U.S. lawmakers weigh legislation such as the GENIUS Act to advance stablecoin adoption. The announcement adds momentum to the Cosmos-based network’s recent growth. Sei’s native token, SEI, traded at about $0.33 after the news, capitalizing the project at roughly $2 billion. Despite a broader market pullback, the blockchain hosts 54 million wallets and posts more than two million average daily transactions. Total value locked stands near $615 million, according to Token Relations data.