Two days ago, it was mentioned that the x402 protocol was increasingly being adopted by the mainstream, after all, AWS reported that it was being hyped up, and Circle's financial report also showed that it was supported by Mastercard, Alchemy, and others. Then, WTF saw the MPP (Machine Payments Protocol) protocol incubated by Tempo public chain. The question is, why did Stripe start anew? Will this threaten the future of the x402 protocol? There are two main differences: 1) The underlying logic of x402 focuses on the "per request" on chain settlement logic, which inevitably leads to significant on chain friction in engineering implementation and is extremely sensitive to the native concurrency and small fee rates of the chain. MPP proposes a Session feature, where the Agent only needs to perform one handshake authentication and set a spending limit. Subsequently, hundreds or thousands of high-frequency API calls are packaged and settled in a delayed manner. To give an inappropriate analogy, MPP is like an extended L2 protocol layer of x402, which uses high concurrency thinking to reduce dimensionality and combat the heaviness on the pure chain; 2) MPP follows a mixed route of fiat and Crypto assets, positioned as a universal extension layer that is "rail agnostic" for payments. Its advantages are also very obvious, with Stripe's cold start advantage of millions of merchants and its payment advantage closer to the fiat channel. The short-term channel coverage and data volume will rise very quickly. However, x402 is completely different, embracing native stablecoins with its advantages of permissionless and Chaing agnostic chain independent open tone, making it easier to become a truly cross ecological underlying payment protocol in the future. At present, native chains and ecosystems such as Ethereum, Base, Solana, etc. are fully integrated, and the base of the A2A economy is also based on x402 as the core payment channel. Therefore, x402 can better represent the future lifeline of the Crypto crypto economy. The above. McKinsey recently predicted that the scale of agent payments will reach $3-5 trillion by 2030. Before the arrival of this massive incremental market, traditional payment giants will never be willing to just be a low-level channel in the x402 ecosystem. So, Stripe has come in, and there is no guarantee that Visa and others will jump out to grab the market in the future, just like the chaos between Tether, Crickle, and Stripe in the stablecoin public chain. But in my opinion, this battle was already highly contested from the beginning. X402 will be threatened in the short term, as the channel advantages of MPP cold start are obvious. However, by extending the timeline, x402 is the true underlying protocol innovation at the HTTP level, and will be the future decentralized payment infrastructure that integrates TradFi+DeFi. Its position will never be shaken.