[Coinbase: x402 Protocol Introduces Multiple Updates, Now Supports All ERC-20 Tokens] Deep Tide TechFlow reports, on March 17, according to an official announcement from the Coinbase Developer Platform (@CoinbaseDev), the x402 protocol has recently introduced three major updates: 1. Support for payments with all ERC-20 tokens. Developers can now accept on-chain payments in USDC, EURC, and any ERC-20 tokens via EIP-3009 and Permit2. 2. Launch of the Sign-in-with-X (SIWX) feature, enabling cross-chain login for EVM and Solana wallets. Buyers can access purchased content without repeated payments by signing with their wallets. This feature is built on standards such as CAIP-122 and EIP-4361. 3. Introduction of the x402 MCP toolkit, providing developers with a one-click monetization MCP tool and direct integration capabilities with AI workflows.