As the AI commerce protocol war heats up, payment processors are quietly choosing sides. This isn’t neutral infrastructure—it’s a bet on which business model will dominate the agentic economy.
The Alignment
| Payment Processor | Aligned With | Protocol |
|---|---|---|
| Stripe | OpenAI | Agentic Commerce Protocol (ACP), Shared Payment Token |
| PayPal | Google + Perplexity | Agent Payments Protocol (AP2), UCP ecosystem |
What This Means
For merchants on Stripe: Lower barrier to ACP adoption. Enabling agentic payments through OpenAI’s protocol requires as little as one line of code.
For merchants optimized for Google Pay: Lower barrier to UCP adoption. Transactions flow naturally through Google’s commerce and measurement infrastructure.
The Lock-In Effect
Payment processor alignment creates downstream lock-in effects. Once a merchant commits to one payment infrastructure, switching costs accumulate:
- Integration complexity
- Transaction history and analytics
- Customer payment preferences
- Compliance and security certifications
Why It Matters
The payment layer is where business model assumptions get encoded. Stripe’s alignment with OpenAI supports transaction-fee economics. PayPal’s alignment with Google supports advertising-embedded commerce.
Whichever protocol wins the commerce layer will determine the monetization model for the entire agentic economy.
Read the full analysis: The AI Advertising Wars









