Mastercard and Visa are extending stablecoin technology into the systems that settle card payments between financial institutions, while leaving the consumer checkout experience largely unchanged. Mastercard completed its acquisition of stablecoin infrastructure provider BVNK in August 2026 and has expanded its network’s settlement options to include regulated stablecoins. Visa, meanwhile, is working with Stripe-owned Bridge and Lead Bank on on-chain settlement for card programs. The shift became more concrete in September, when SoFi Bank moved its credit and debit card issuing portfolio to live settlement using its bank-issued SoFiUSD. That portfolio represents more than $25 billion in annualized card volume, a measure distinct from the value settled in stablecoins. Visa separately reported an annualized stablecoin settlement run rate exceeding $25 billion in October. The networks’ initiatives target the back-end movement and reconciliation of funds, including periods when traditional bank settlement rails are unavailable; they do not require merchants to accept cryptocurrency.

PhotonPay has closed a $40 million Series C round led by Blockchain Capital to expand its stablecoin-focused Financial OS. SBI Group joined as a new investor, alongside existing backers IDG Capital, GL Ventures and Lightspeed Faction. The funding follows a January 2026 Series B round. PhotonPay reported $65 billion in annualized transaction volume as of August 2026, up from $30 billion reported at the time of its Series B. Its model combines stablecoin liquidity with bank relationships and local payment networks, rather than replacing those networks outright. The company says it holds 34 payment and financial licenses and regulatory authorizations and serves more than 200,000 corporate clients. It also plans an execution layer supporting the Model Context Protocol for autonomous AI agents. The expansion comes as Stripe and specialist firms including Rain and MassPay pursue corporate settlement opportunities.

Ripple’s final federal trust bank charter, a Moody’s investment-grade rating for RLUSD and a planned expansion of the stablecoin’s availability on Coinbase have strengthened its position as a regulated digital dollar. Coinbase said Global Exchange access, including eligibility to use RLUSD as trading collateral, will follow its initial retail and prime rollout. Moody’s assigned RLUSD an A2 long-term deposit rating and a P-1 short-term rating, the first investment-grade rating it has given a stablecoin. The distinctions behind those developments matter. Ripple National Trust Bank manages RLUSD’s reserve collateral, but the legal issuer remains Standard Custody & Trust Company, a New York-regulated Ripple subsidiary. The national trust bank is uninsured and cannot take commercial retail deposits or extend credit. Moody’s also noted that holders do not currently own the underlying reserves directly and that statutory bankruptcy protections depend on implementation of the GENIUS Act, whose rules take effect in January 2027.

The Linux Foundation appointed payments veteran Michael Hursta executive director of the x402 Foundation on October 1, 2026, as payment systems designed for autonomous AI agents gained attention. Foundation members reported more than 75 million agentic payment transactions in a 30-day period in September, and Coinbase and Amazon Web Services showcased production payment rails at Sibos 2026. Reported transaction counts, however, do not establish the value or commercial character of that activity. The emerging protocols address different obstacles. Coinbase’s x402 enables per-request USDC payments through HTTP, while Google’s Agent Payments Protocol uses signed mandates to connect an agent’s purchases to a user’s authorization. Stripe and Tempo have also proposed session-based billing through the Machine Payments Protocol. These approaches respond to card fees and interactive checkout checks that can impede small, automated transactions. Card networks are developing delegated-identity tools, leaving multiple potential paths for agent payments rather than a single replacement for existing rails.

Ramp partnered with Stripe and Bridge in July 2026 to deploy stablecoin rails for business bill payments and yield-bearing stablecoin accounts funded through standard fiat bank accounts. The arrangement shows how stablecoins can be incorporated into familiar payment workflows without requiring businesses to fund every transaction with digital assets. The economics depend on more than the cost of moving a token on-chain. Stripe charges merchants 1.5% for stablecoin checkout transactions, versus its standard card-processing fee of 2.9% plus $0.30; neither figure establishes the price of Ramp’s bill-payment service. Businesses receiving fiat may also face foreign-exchange and off-ramp costs, typically 0.3% to 2.0% when converting into local banking systems. Domestic clearing networks and compliance checks remain part of end-to-end delivery. Bridge’s issuance and transfer tools, alongside its conditional U.S. trust-bank approval, illustrate the infrastructure behind those payments—but not the elimination of every payment cost.

StraitsX has opened onboarding for digital payment token providers across more than 100 markets through an expanded card-issuing architecture developed with Visa. Integration documentation published on 26 October 2026 describes a multi-BIN model that combines issuing sponsorship, transaction authorization, compliance screening and fiat clearing. The approach lets participating providers build stablecoin-backed card products while merchants continue to receive conventional fiat payments through Visa’s network. StraitsX says its card gross transaction value rose 40-fold year on year from Q4 2024 to Q4 2025, while cards issued across Asia increased 83-fold. On-chain issuer telemetry recorded monthly card transaction volume of $310 million to $438 million through October 2026. The company’s stated $6 billion annualized card transaction figure is distinct from its cumulative $70 billion in processed stablecoin volume. StraitsX and Visa have also scheduled demonstrations of agentic payments for November 2026.