[Coinbase: x402 Protocol Rolls Out Multiple Updates, Now Supports All ERC-20 Tokens] The Coinbase developer platform announced on X that the x402 protocol has introduced several key updates: it now supports all ERC-20 tokens, allowing developers to accept on-chain payments in any ERC-20 token, including USDC, EURC, and even meme coins, via EIP-3009 and Permit2. A new 'Sign-in-with-X' feature has been added, enabling buyers to log in through their wallets to access purchased content, while sellers can offer returning customers access without payment. This feature supports both EVM and Solana wallets. Additionally, the x402 MCP software package has been launched, enabling developers to monetize any MCP tools and directly integrate them into AI workflows. These updates aim to make x402 the most flexible and open internet-native standard.