Coinbase officially launched the x402 open standard with the publication of its whitepaper and a public announcement, aiming to standardize internet-native payments.

The initial commit, including the project's Apache-2.0 license file, was made to the official Coinbase GitHub repository, marking the project's origin.

A significant commit established the core TypeScript ecosystem by creating multiple npm modules for frameworks like Express, Next.js, and Hono.

The project's future direction was outlined with the addition of ROADMAP.md and PROJECT-IDEAS.md files to the public repository.

The protocol's multi-chain capabilities were expanded with the addition of support for the Solana blockchain (SVM), enabling payments beyond EVM-compatible chains.