Chainfeeds Summary:
Who will pay for AI agents? Four major payment protocols are splitting the $73 billion machine transaction market.
Article source:
https://www.techflowpost.com/zh-CN/article/31709
Article Author:
Keyrock
Opinion:
Keyrock: In September 2024, if you wanted an AI agent to pay you, you essentially had only one insecure option. Twelve months later, four architectures existed, backed by some of the tech giants. Coinbase built x402, a crypto-native protocol that turned stablecoin wallets into universal API keys. Stripe and Tempo launched MPP, a payment method-agnostic standard that processed bank cards, cryptocurrencies, and the Lightning Network through a single HTTP process. Google assembled AP2, an authorization layer that allowed users to delegate payment authority to an agent via cryptographic authorization. Visa extended the existing bank card track, offering AI-ready tokenized credentials. What most reporting overlooked was that these four solutions weren't purely in competition. There was some overlap in the protocol layers, but the more important dynamic was that they were assembling into a payment stack. We believe the right question isn't which protocol will win, but rather which companies control the most layers and therefore capture the most value? Of the 176 million x 402 payments to date, the median transaction amount is between $0.01 and $0.10, with 76% of the activity falling below the $0.30 debit card fee floor. This figure almost explains why traditional payment tracks are failing to serve this market. A fixed processing fee of about 30 cents per transaction makes small payments unprofitable. An agent paying 3 cents for a weather API call cannot be routed through Visa. Of those 176 million payments, 98.6% were settled in USDC. Stablecoins have almost automatically won the settlement layer for machine commerce; they are the only tools capable of handling small transactions without the economic model collapsing. This concentration is both a validation and a vulnerability. It validates Circle's position as the default settlement asset, but it also means the entire agent payment ecosystem depends on a single stablecoin issuer's reserve management, regulatory position, and technological infrastructure. No one in the industry is openly discussing this. We think they should. Coinbase and Stripe each cover five of the six layers of the emerging payment stack. Coinbase controls the settlement layer (Base), wallets (Agentic Wallets), routing (internal infrastructure), payment protocol (x402), and governance (as an AP2 partner). Stripe mirrors this with Tempo (settlement), Privy (wallets), Bridge (routing, acquired for $1.1 billion), MPP (protocol), and its compliance infrastructure. The machine economy has arrived. It just hasn't started doing business yet. But the signals are clear: AI agents account for 37% of all Safe transactions on the Gnosis Chain, peaking at over 75%. Coinbase has deployed tens of thousands of agents with built-in safeguards. Over 104,000 agents are registered in 15 or more directories and registries. The shift from exploitative bot activity to productive agent commerce is underway. The payment infrastructure studied in this report is precisely what makes this possible. MiCA, the GENIUS Act, and the EU AI Act will all reach the implementation stage within weeks of each other in mid-2026. None of them handle autonomous machine-to-machine transactions. This is not a problem of the future; it is a problem of the present, unfolding on the real-time timeline of capital betting.
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