Stakefy's x402 SDK has quietly become a powerhouse in Solana's payment infrastructure. Recent data shows it's now the second most adopted payment facilitator on the network, trailing only a major regulated platform in terms of integration numbers. This SDK enables developers to embed seamless payment flows into decentralized applications, handling everything from transaction processing to wallet connectivity. The rapid adoption signals growing demand for user-friendly payment solutions in the Solana ecosystem. What makes this noteworthy? Payment rails are typically dominated by established centralized players, yet here's a specialized solution carving out significant market share purely through developer preference. The gap between first and second place is narrowing as more projects prioritize efficient on-chain payment experiences.