Credit cards aren't going anywhere in the age of AI agents, but a massive opportunity is opening up for stablecoins to serve merchants that traditional payment processors reject. While recent crypto commentary suggested that artificial intelligence would optimize away interchange fees and make cards obsolete, the reality is far more nuanced. Cards do more than move money; they extend credit, pre-authorize uncertain transactions, and guarantee fraud protection. Stablecoins, by contrast, move money and little else .

Why Cards Will Dominate Agentic Commerce for Most Transactions?

The case against cards rests on a flawed assumption: that AI agents, freed from human habit, will automatically choose cheaper payment methods. But consumers have strong reasons to stick with cards. Eighty-two percent of Americans carry a rewards card, and 18 billion cards are in circulation globally . When a hotel booking doesn't match its listing, cardholders can dispute the charge. With a stablecoin, the money is gone forever. Card networks also run fraud detection models across billions of transactions in real time, a capability stablecoins lack today .

The card industry has repeatedly adapted to new transaction types rather than ceding ground. Visa has processed over 2 billion transit fares by aggregating taps into daily settlements. Mastercard's Agent Pay is already live for all US cardholders, and Visa's Intelligent Commerce framework is in pilot testing. Stripe and OpenAI built the Agentic Commerce Protocol, which already has Etsy live and over a million Shopify merchants set to come online .

Where Do Stablecoins Actually Win in the AI Economy?

The real stablecoin opportunity lies not in replacing cards for existing merchants, but in serving merchants that traditional processors cannot yet justify underwriting. Every major platform shift has created waves of new merchants that the existing payment system couldn't serve. When eBay emerged, peer-to-peer sellers couldn't get merchant accounts; PayPal served them and grew to handling 40 percent of eBay auction payments by 2000. Shopify grew from 42,000 merchants to 5.5 million in 13 years. Stripe was founded before many of its eventual customers even existed .

The AI wave is creating new merchants faster than any previous platform shift. Thirty-six million new developers joined GitHub in the last year alone. In Y Combinator's Winter 2025 batch, a quarter of companies had codebases that were 95 percent or more AI-generated. On Bolt.new, one of the most popular AI coding platforms, 67 percent of 5 million users are not developers . These are people who couldn't write production code two years ago but are shipping software now.

How Stablecoins Serve the "Vibe Coder" Economy

• Instant Monetization: A developer builds a tool that presents financial data for public companies in four hours using AI coding tools. No website, no terms of service, no legal entity required. Another developer's agent calls it 40,000 times in a week at a tenth of a cent per call, generating $40 in revenue with no human ever visiting a checkout page .
• Zero Onboarding Friction: Protocols like x402 embed stablecoin payments directly into HTTP requests, requiring no merchant account, no processor, no onboarding, and no chargeback liability .
• Risk-Free for Processors: Traditional payment processors reject applicants they cannot underwrite. A tool with no website, no entity, and no track record is extremely difficult to underwrite because processors take on the merchant's risk if fraud or chargebacks occur .

These new merchants are not choosing stablecoins over cards. They are choosing stablecoins over nothing. Existing payment processors will find it difficult to onboard them, not because the technology is lacking, but because the risk profile is hard to assess. It took 16 years from PayPal's launch to the first industry underwriting guidelines for the payment facilitator model it pioneered .

For the gap between merchant emergence and processor adaptation, stablecoins are the only option that works today, despite rough wallet user experience and still-forming compliance frameworks. Every wave of new merchants has eventually been absorbed by the traditional payments system, and the same will probably happen here on some timeline. But the merchants come first, and the underwriting catches up later. In that gap, stablecoins are the infrastructure .

The payment landscape of the AI era won't be defined by cards losing dominance. It will be defined by stablecoins filling the space that traditional processors cannot yet serve, enabling millions of new creators and developers to monetize their work instantly and without friction.