Stripe's Shared Payment Token Becomes Default Agent Commerce Layer

Agentic commerce has been split across competing standards like x402, Google UCP, and Mastercard AP4M, each addressing a different piece of how AI agents would pay. Stripe's Shared Payment Token was introduced in October 2025 to act as an abstraction layer over that fragmentation, and by March 3, 2026 it had aggregated Mastercard Agent Pay, Visa Intelligent Commerce, and BNPL providers such as Affirm and Klarna into one interface. That same aggregation is what makes Stripe the only provider supporting both agentic network tokens and BNPL tokens within a single primitive.

The design choice matters for how trust is enforced. Rather than relying on static permissions handed to an agent in advance, the SPT integrates Stripe Radar for real-time fraud and risk signaling to verify an agent's authority at the exact moment of execution. That maps closely to the trust deficit now limiting adoption: only 3% of total transactions involve agents, and just 14% of consumers say they trust AI to make purchases. For merchants already on Stripe, the practical cost of accepting agent-initiated payments is close to zero, which is the bet behind the infrastructure.

Whether Stripe's approach becomes the default hinges on consumer trust rising faster than the standards wars around it resolve. Klarna CCO David Sykes calls the infrastructure definitive for online checkout over the next decade, but the body's own figures show a substantial gap between that ambition and current consumer behavior. The outcome is likely to depend on whether automating the integration for existing sellers is enough to overcome the trust deficit.