Two weeks ago, we covered Mastercard going live with Agent Pay across Latin America with eight partners. Live, end-to-end transactions. AI agents completing purchases on behalf of real customers. Three continents in a single month.

Now Visa and Banco Santander have completed their own agentic commerce pilot across five Latin American markets. Announced on March 12, the transactions were powered by Visa Intelligent Commerce, the framework Visa launched in April 2025.

Same region. Same month. Different network. Different architecture. If there was any lingering doubt about whether the card networks are taking agentic payments seriously, two competing LATAM rollouts in the space of a fortnight should settle it.

The card networks are not debating whether AI agents will transact. They are racing to determine whose rails those agents will run on.

What Visa and Santander Actually Did

The pilot is specific. Visa and Santander completed agentic commerce transactions across five markets: Argentina, Brazil, Chile, Mexico, and Uruguay. AI agents purchased physical goods: books in Argentina, Chile, Mexico, and Uruguay, and chocolates in Brazil.

These were not simulated transactions in a sandbox. They ran within Visa and Santander's regulated payment framework, under existing supervisory standards. Banco Santander used its own regulated payment network alongside Visa Intelligent Commerce to process the transactions.

The pilot validated three things:

That interoperability point matters. Five countries means five central banks, five sets of payment regulations, and five different merchant ecosystems. Running a single framework across all of them, even in a controlled pilot, is a meaningful proof point.

Two Strategies, One Conclusion

Here is what makes this month remarkable. Mastercard and Visa both chose Latin America as their proving ground for agentic payments. Both completed live transactions. Both announced results in March 2026. But they took fundamentally different approaches.

Mastercard went broad. Eight partners across acquiring, processing, issuing, and digital commerce. Bemobi, Checkout.com, Davivienda, Evertec, Getnet, Inti, MagaluPay, and Yuno. The goal was to prove that Agent Pay works across the full payment chain, every link covered.

Visa went deep. One banking partner. Five specific markets. Controlled pilot with defined test cases. The goal was to prove that Visa Intelligent Commerce works across regulatory boundaries with a single, trusted issuer.

Mastercard's architecture centres on Agentic Tokens, dynamic cryptographic credentials that replace card numbers and are bound to the AI agent. Visa's architecture centres on Visa Intelligent Commerce, a platform designed to manage the full lifecycle of agent-initiated transactions, from discovery and consent through to settlement.

Different starting points. Different infrastructure bets. But the same conclusion: Latin America is where agentic payments are being tested first, and whoever builds the deepest operational evidence there will have a significant head start when the market scales.

Why Latin America

The choice of region is not accidental. Latin America has several characteristics that make it an ideal testing ground for agentic payments.

Digital payment adoption across the region has accelerated sharply since the pandemic. Brazil's Pix instant payment system processed over 42 billion transactions in 2024. Mexico's CoDi and Argentina's Transferencias 3.0 have pushed real-time payments into everyday commerce. The infrastructure is modern, often more modern than legacy systems in the US and Europe.

Regulatory environments are progressive but not prescriptive. Central banks across the region have embraced digital payments innovation without heavy-handed rules that would make experimentation difficult. That creates space for controlled pilots like the Visa-Santander deployment to operate within existing supervisory frameworks rather than requiring new regulatory approvals.

And the market is large enough to matter. Latin America represents over 660 million consumers across diverse economies. If an agentic payments framework works across Argentina, Brazil, Chile, Mexico, and Uruguay, it has been tested across a meaningful range of currencies, regulations, and consumer behaviours.

Latin America is not a secondary market for agentic payments. It is the primary testing ground. Both card networks chose it first for a reason.

The Architecture Comparison

The technical differences between the two approaches tell you something about each network's longer-term strategy. We mapped the agentic commerce stack earlier this quarter, and these two deployments slot into different layers.

Mastercard Agent Pay is a processing framework. It handles the transaction itself: credential management through Agentic Tokens, cardholder consent via the Agent Pay SDK, and transaction processing through existing Mastercard rails. It is designed to slot into any agent platform, from OpenAI to enterprise-built systems, and provide the payment execution layer.

Visa Intelligent Commerce is a broader platform. Launched in April 2025, VIC is designed to manage the entire agent commerce lifecycle, not just the payment. It handles product discovery, merchant matching, consent management, and settlement within a single coordinated framework. The Santander pilot demonstrates VIC operating as an end-to-end orchestrator rather than a processing component.

The distinction matters for merchants and issuers evaluating which framework to support. Mastercard's approach is modular. It asks: "You have an agent? We'll process the payment." Visa's approach is integrated. It asks: "You want agent commerce? We'll manage the whole thing."

Both strategies have strengths. Mastercard's modularity means faster adoption, because it requires less integration. Visa's integration means tighter control, because the entire flow runs through a single platform. The market will eventually tell us which one merchants and banks prefer. Or, more likely, which one they encounter first.

What the Santander Relationship Reveals

Santander is now the only bank to have completed live agentic transactions with both card networks. In early March, Santander and Mastercard completed what they called Europe's first live end-to-end payment executed by an AI agent. Now Santander and Visa have completed a five-market pilot across Latin America.

That is not a coincidence. Santander operates across 10 countries in Latin America and is one of the largest banks in Europe. It is the natural partner for any network that wants to prove cross-border, multi-market capability. And Santander appears to be deliberately avoiding exclusivity. Working with both networks gives the bank operational experience with both frameworks and avoids being locked into a single processing partner for agentic transactions.

For the industry, Santander's dual-network approach is a signal. Banks with cross-border footprints are likely to support both Mastercard Agent Pay and Visa Intelligent Commerce, treating them the same way they treat conventional card processing today: accept both, optimise for whichever delivers better economics.

The Trust Gap Remains

Both deployments prove that the technology works. AI agents can initiate and complete payments on existing card rails, with cardholder consent, within regulated frameworks. That is no longer a question.

The question that remains is whether consumers will trust agents to do this. As we explored in our analysis of the trust gap in agentic commerce, only 10 percent of consumers have actually let an AI agent complete a purchase. The gap between curiosity and delegation is wide. Books and chocolates are low-stakes test cases. The real test comes when agents are handling recurring purchases, managing subscriptions, or making decisions about higher-value goods.

Controlled pilots with defined test cases are necessary first steps. They prove the rails work. But the distance between "an AI agent bought a book in Buenos Aires during a controlled pilot" and "consumers routinely delegate purchasing decisions to AI agents" is measured in years, not months.

What to Watch

Network convergence or divergence. Will Mastercard and Visa's approaches converge toward a common standard, or will the industry operate with two parallel frameworks? The answer will determine integration costs for merchants and banks. Watch for industry body discussions at Nexo or EMVCo about agentic transaction standards.

Santander's next move. As the only bank with live transactions on both networks, Santander's public statements about which framework it prefers, or whether it advocates for interoperability, will carry disproportionate weight.

Consumer pilots. Both deployments were controlled environments with defined participants. The next milestone is an open consumer pilot where real cardholders opt in to agent-initiated transactions. Whoever runs that first has the strongest case for production readiness.

Regulatory response. Five Latin American central banks now have live agentic payment transactions in their jurisdictions. Expect regulatory inquiries, guidance, or formal consultations before year end. The regulators did not invite this. The networks brought it to their doorstep.

Sources

Two card networks ran agentic payment pilots in Latin America in the same month. The technology works. The rails work. The frameworks exist. But controlled pilots with books and chocolates are a long way from consumers trusting AI agents with their wallets. When does the first open consumer pilot go live, and which network gets there first?

Charlie Major is a Product Development Manager at Mastercard. The views and opinions expressed in Major Matters are his own and do not represent those of Mastercard.