What Do Credit Card Networks Do

Key Takeaways

• Visa and Mastercard are clearing and settlement networks, not lenders: they connect issuing banks to acquiring banks, set rules, and charge a fee for clearing each transaction. They never hold your balance or charge you interest.
• The 2026 story is that both networks are investing in crypto and agentic-commerce rails. Visa’s stablecoin settlement volume reached a $20 billion annualized run rate in fiscal Q2 2026, 15 times the year-earlier level, and Mastercard completed its $1.8 billion acquisition of BVNK on August 3, 2026.
• On September 10, 2026, Visa, Mastercard and Ant International announced they had started work on a Know-Your-Agent framework to verify AI agents that spend on a cardholder’s behalf, citing a McKinsey projection that agents could handle $3 trillion to $5 trillion of consumer commerce by 2030.
• The core economics remain the same. Visa’s fiscal Q2 2026 net revenue was $11.63 billion, up 14% year over year, almost entirely from fees on other people’s money moving through its network.

What Changed Since the Last Look at This

The mechanics of the card network have stayed the same: Visa (V) and Mastercard (MA) still operate between the bank that issued your card and the bank that accepts the payment, and they still earn a fee for clearing that exchange. What has changed is where the two companies are investing to protect that position.

In our prior breakdown of the network model, the stablecoin and AI topics were one paragraph at the end. That description is now outdated. Between June and September 2026, both networks launched platforms, completed acquisitions, joined a 140-company stablecoin consortium, and announced a shared verification standard for AI agents.

The previous post also relied on 2025 full-year figures (Visa at roughly 257 billion VisaNet transactions and about $40 billion in revenue). Both companies have since reported two more quarters, and the newer numbers reveal where growth is coming from. This update uses fiscal Q2 2026 and Q2 2026 results.

The Stablecoin Pivot

For most of the last decade, the networks treated crypto as a compliance issue. In 2026 they began acquiring the rails themselves.

Visa’s stablecoin settlement volume reached a $20 billion annualized run rate in its fiscal second quarter of 2026, a 15-fold increase from a year earlier, according to Crypto Briefing. More than 160 stablecoin-linked card programs were active on Visa’s network in that quarter, with payment volume tied to those programs up nearly 200% year over year. Visa was running at roughly $3.5 billion annualized late in 2025, reached $7 billion by April 2026, then nearly tripled again.

Mastercard took the acquisition approach. It completed its $1.8 billion purchase of stablecoin infrastructure firm BVNK on August 3, 2026, a deal first announced in March, per PYMNTS. Chief product officer Jorn Lambert described the strategy as preparing for a “multi-money world where fiat, stablecoins and tokenized deposits and other forms of value coexist,” and said the next payments model would depend on how well each rail connects to the others.

Both networks also supported a third approach. In June 2026, a consortium of more than 140 companies including Visa, Mastercard, Stripe and Coinbase launched Open USD (OUSD), a dollar-pegged stablecoin managed by an independent company called Open Standard, per SiliconANGLE. The goal is to capture stablecoin economics that currently go to Tether and Circle.

Visa’s Platform Versus Mastercard’s Acquisition

The two strategies differ in how the products appear. Visa built a managed platform; Mastercard acquired infrastructure and is integrating it through existing bank settlement relationships.

Visa Stablecoin Platform launched in limited beta on July 16, 2026. It combines stablecoin minting, wallet infrastructure and payment-network connectivity in one managed environment, targeting treasury, settlement, liquidity and embedded-payment use cases, according to Bitcoin.com’s platform review. The platform initially supports Open USD, alongside assets Visa already handled including Circle’s USDC and Paxos’ USDG. It includes dual-control authorization, audit logging, secure passkeys and transfer allow lists designed for institutional governance requirements.

Mastercard’s June 2026 expansion added intraday, weekend and holiday card settlement in both fiat and regulated stablecoins, starting with USDC, RLUSD, PYUSD and three other assets across eight blockchains, per its own announcement. That is a settlement-efficiency offer: it gives issuers and acquirers more flexibility in when and how they move value.

Sources: Visa fiscal Q2 2026 results summarized by MarketsFN; Mastercard Q2 2026 revenue and BVNK completion from TradingKey. The two companies report on different fiscal calendars, so the quarters are not perfectly aligned.

One structural difference affects risk. Visa’s version relies on partners and a newly introduced stablecoin; Mastercard’s depends on owned infrastructure that must be integrated into a large existing business. Visa responded to the BVNK sale by seeking a replacement settlement partner now that BVNK is part of its largest competitor, according to CoinDesk.

The AI Agent Identity Fight

The second focus in 2026 is agentic commerce: software that buys on a consumer’s behalf. The main challenge is identity, not payment. A merchant needs to confirm that the agent presenting a credential is authorized to spend, not just that the credential is valid.

On September 10, 2026, Ant International, Mastercard and Visa announced they had started collaborating on a Know-Your-Agent (KYA) interoperability framework to verify and monitor AI agents that make purchases for users, reported by Reuters. Each company already runs its own protocol (Visa’s Trusted Agent Protocol, Mastercard’s Verifiable Intent, Ant’s Agentic Mobile Protocol), and the framework aims to allow trust signals to cross networks without duplicating verification. The process focuses on three elements: cross-network operator traceability, shared certification requirements, and continuous transaction monitoring.

The companies referenced a projection that by 2030 AI agents will manage $3 trillion to $5 trillion of global consumer commerce. That figure comes from a January 28, 2026 McKinsey QuantumBlack research note, which described agentic commerce as a six-level automation curve rather than a single switch. The networks’ own consumer research is more cautious: PYMNTS Intelligence, working with Worldpay, found 45% of consumers are comfortable letting an AI agent complete a purchase while 95% still have at least one concern, reported in PYMNTS.

The Working Capital Twist

The most significant 2026 development is credit. On September 8, 2026, Visa announced a program that pairs VisaNet settlement data with blockchain-based lending infrastructure to fund stablecoin-linked card programs and fintechs, reported by PYMNTS. Card issuers must fund settlement obligations before collecting from cardholders, creating a recurring financing gap that grows with transaction volume.

Visa’s approach is that verified settlement data can serve as an underwriting input rather than just a reporting output. The company estimated that more than $694 billion in stablecoin-denominated loans have moved through on-chain lending protocols since 2020. Its expanded credit facility with Credit Coop has financed over $2.5 billion across more than 3,000 borrowing events with a default rate of zero, per Crypto Briefing. A zero default rate across 3,000 events is a limited sample in a young asset class and does not imply the rate will hold if credit conditions tighten.

This connects the stablecoin work back to the traditional network model. The prior post noted that Visa and Mastercard earn fees on volume they do not control. Adding credit and liquidity directly to the payment event attempts to earn a second fee on the same transaction, this time from the issuer rather than the merchant.

What the 2026 Numbers Actually Show

None of the crypto and AI initiatives have changed the core revenue engine yet. Both networks still earn most of their money from fees tied to transaction volume, cross-border spending, and value-added services like fraud scoring and data analytics.

Mastercard’s Q2 2026 results showed value-added services growing 20% while overall revenue grew 14%, with cross-border volumes up 12%, according to Money365’s earnings breakdown. The faster-growing segments are services layered on top of the network, not the network itself.

The trade-off is structural. Both companies depend on volume they do not control directly, and their fees are central to a merchant lawsuit that has lasted two decades. Stablecoins and agentic payments provide new opportunities to collect fees, but they do not remove the reliance on other people’s spending.

Risks and Open Questions

The stablecoin push involves execution risk that the headline growth numbers conceal. Visa’s platform launched in limited beta supporting Open USD, a stablecoin introduced only weeks earlier and managed by a new consortium company. Adoption depends on whether institutions move beyond testing to real transaction volume, and Open USD has no long operating history. Access also requires an existing Visa Access ID and Business Identification number, so the platform is only available to Visa’s current clients.

Mastercard’s strategy depends on one acquired company. Owning BVNK’s rails gives it control but also integration risk, and the deal makes Mastercard a direct competitor to the partners Visa now needs to replace.

The agentic approach faces its own adoption gap. The KYA framework is a collaboration announcement, not a finalized standard, and it competes with parallel efforts including the Linux Foundation’s x402 Foundation, launched July 14, 2026, and the Agentic Payments Alliance. Competing standards increase the cost of the interoperability the networks say they want.

What to Watch Next

Two dates are important for anyone following this. First, Visa’s fiscal Q4 2026 results, expected in late October, will reveal whether the stablecoin run rate continued growing past the $20 billion mark or leveled off after the platform beta. The growth so far (roughly $3.5 billion annualized in late 2025, $7 billion by April 2026, then $20 billion) suggests acceleration, but one quarter does not establish a pattern.

Second, observe whether the Know-Your-Agent framework produces a working specification by early 2027 or remains a press release. A verifiable standard that lets a merchant accept an agent’s credential across networks would be a meaningful development; another alliance announcement would not.

I expect Visa’s stablecoin settlement run rate to exceed $30 billion annualized in its fiscal Q4 2026 report, because 160-plus live card programs are still early in their volume ramp and the Credit Coop working-capital program removes a financing constraint that limited smaller issuers. If the beta cohort moves to production, the run rate could surpass that level before the fiscal year ends.

The Bottom Line

Visa and Mastercard remain what they have always been: fee-collecting clearing networks with almost no credit risk and high margins. What changed in 2026 is that both stopped viewing stablecoins and AI agents as threats and began acquiring and building the infrastructure beneath them.

The financials still reflect the traditional model, with both networks reporting 14% revenue growth in their latest quarters driven by card volume and services. The crypto and agentic initiatives are a bet on where the next decade of volume will come from, and they carry real execution risk: a beta product on a brand-new stablecoin, a single large acquisition in Mastercard’s case, and a verification standard that three competitors announced before completing it.

For consumers, none of this changes the practical choice. The bank on the card sets the terms; the logo on the back determines where it works. That has not changed since 1958.

Sources and References

Sources cited while researching and writing this article:

• Visa’s stablecoin settlement volume hits $20B annualized rate, up 15x in a year
• Mastercard Finalizes Purchase of Crypto Infrastructure Platform BVNK
• SiliconANGLE
• Visa Stablecoin Platform Pushes Institutional Payments Onchain With Open USD
• Visa (V) Q2 2026 Financial Results Summary | MarketsFN
• Mastercard Q2 2026 Revenue $9.3B (+14%), BVNK Acquisition Aug 3 …
• Payment firms Visa, Mastercard and Ant International team up on AI agent trust framework
• Visa and Mastercard Put Tokens in Charge of AI Commerce
• Visa Tests Stablecoin Loans to Fund Card Program Growth
• Mastercard Q2 2026 Earnings: Services Grow, Rebates Rise