Agentic Payments In B2C Commerce: Where We Are Now

Why It Matters

Low consumer uptake and fragmented standards threaten the scalability of AI‑enabled B2C payments, forcing merchants and networks to invest heavily in interoperability to capture future growth.

Key Takeaways

• US consumer adoption of AI checkout stays under 5%, growth still tepid
• Google UCP and OpenAI ACP dominate protocol market share
• OpenAI shuttered Instant Checkout, shifting focus to ChatGPT Apps
• Stripe and Tempo launched Machine Payments Protocol for autonomous AI‑to‑AI payments
• Payment providers reposition as connectors, building support for multiple agentic standards

Pulse Analysis

The promise of agentic commerce—AI agents completing purchases on behalf of users—has yet to translate into broad consumer behavior. Forrester data shows that only a small slice of U.S. online adults, primarily Millennials and men, have experimented with OpenAI’s Instant Checkout, and adoption has plateaued. This tepid response highlights lingering trust gaps, limited awareness, and the friction of handing financial control to an algorithm, keeping the market in a proof‑of‑concept stage rather than mass adoption.

At the same time, the infrastructure battle is heating up. Google’s Universal Commerce Protocol (UCP) leverages the Gemini app’s 750 million monthly users, while OpenAI’s Agentic Commerce Protocol (ACP) rides on ChatGPT’s 900 million weekly active users. Alibaba’s Alipay has introduced AI Pay within its Qwen app, and Stripe together with Tempo unveiled the Machine Payments Protocol (MPP) to enable fully autonomous agent‑to‑agent transactions, now backed by Visa’s Trusted Agent Protocol. The proliferation of standards underscores the industry’s scramble for a universal language that can safely and efficiently move money in an AI‑driven environment.

Merchants and payment processors are adapting by becoming “connectors” rather than sole gateways. Companies like Adyen, PayPal, and Worldpay are building certification layers and SDKs to support multiple protocols—UCP, ACP, MPP, and emerging Know‑Your‑Agent frameworks. Their focus is shifting toward B2B use cases where repeatable, high‑volume payments can be automated first, paving the way for later B2C rollout. The next wave of growth will depend on achieving interoperable standards, improving consumer trust, and demonstrating clear ROI for retailers willing to embed AI agents into their checkout ecosystems.