Coinbase and Shopify Unveil Commerce Payments Protocol for USDC

Onchain payments, reimagined: This week, Coinbase shared more details about the Commerce Payments Protocol, a new onchain payment infrastructure designed to bring card-like flexibility to stablecoin transactions. Merchants can now accept USDC via Coinbase Wallet directly in Shopify checkout, with built-in support for refunds, delayed settlement, and more.

Why it matters: Until now, crypto payments have largely been limited to simple peer-to-peer token transfers which are fast but inflexible, with no built-in support for typical e-commerce flows. The Commerce Payments Protocol adds the flexibility of traditional card networks but runs on open, permissionless infrastructure.

Built with Shopify: The protocol was developed in close collaboration with the Shopify team over the last six months. It integrates directly into Shopify’s checkout, allowing merchants to accept USDC via Coinbase Wallet.

• “It all started when I got a message out of the blue from Tobi, the CEO of Shopify, saying, ‘Can I get your take on how to do off-capture — a really important commerce flow — onchain in an ideal way?’” said Jesse Pollak, who leads Coinbase’s Layer-2 network Base.

A new system: That message sparked the design of a new payment architecture. Instead of sending funds directly to the merchant, the Commerce Payments Protocol uses a smart contract escrow. Customers authorize a payment at checkout; the actual transfer is triggered later by a third-party operator. This setup shifts the burden of gas fees away from the buyer, just like in traditional commerce, and makes the onchain checkout experience feel seamless and familiar.

Use cases: By removing frictions and adding flexibility, the protocol unlocks a range of payment flows that weren’t possible with standard token transfers:

• Refunds: Merchants can return funds partially or in full, without needing a separate transaction or customer support workflow.

• Delayed settlement: Payments are authorized at checkout but only captured after shipping, reducing inventory risk and supporting fulfillment-based workflows.

• Conditional fulfillment: Funds can be released automatically based on delivery status or dispute windows, enabling programmable settlement across supply chains.

Built on Base: These advanced payment flows depend heavily on recent technical improvements in both scalability and speed on Base, including Flashbots' “Flashblocks,” which cut block times from 2 seconds down to just 200 milliseconds, as well as continuous optimizations for higher throughput.

• “I want to give a shoutout to Base because if you don’t have a fast enough network for commerce, then it doesn’t matter how programmable the stablecoin is,” explained Mani Fazeli, a VP of Product at Shopify.

Seamless checkout: To support a one-click e-commerce UX, Base also recently launched Smart Wallet Profiles, a new feature that privately stores customer details, such as shipping addresses or emails, in an encrypted off-chain vault. At checkout, customers can securely share this data with merchants in a single click, enabling portable customer profiles and frictionless shopping experiences across any integrated store.

Next steps: The protocol is currently rolling out across 34 countries where Shopify supports crypto payments. Additional geographic coverage and expanded tooling — including analytics, dashboards, and deeper merchant integrations — are expected in the coming months. A public Dune dashboard tracks adoption, volume, and participating merchants in real time.