David Marcus put a Bitcoin-settled dollar account onto the Visa network on Tuesday and gave AI agents permission to spend from it. The principal-member status is the rare part — most fintechs rent access to Visa through Marqeta or Stripe Issuing.
David Marcus put a Bitcoin-settled dollar account onto the Visa network on Tuesday and gave AI agents permission to spend from it. Speaking on the keynote stage at Bitcoin 2026 in Las Vegas, the Lightspark CEO unveiled Grid Global Accounts — a dollar-denominated payment layer that settles on Bitcoin's Lightning Network and the Spark sidechain, and that now connects directly to 175 million Visa merchants in 33 countries.
The Visa connection is what matters. Lightspark is joining Visa as a principal member, the same designation banks hold. Most fintechs rent that access through intermediaries like Marqeta or Stripe Issuing because principal membership is hard to win and expensive to maintain — Visa requires regulatory approvals in every market, capital ratios, and direct settlement obligations. Lightspark's status removes the middleman; Grid card transactions clear through Visa's rails the same way a JPMorgan-issued card would.
For Marcus this is the third major payment-rail bet of his career. He ran PayPal as president, then led Facebook's Libra/Diem stablecoin project until political opposition killed it in 2022. Lightspark is the framing he settled on after Libra: don't issue a new currency, route dollars over Bitcoin's settlement layer instead. Grid is the consumer-facing fruit of that thesis. Coverage will reach 65 nations and over 14,000 banks for payouts at launch, and Marcus said the company is targeting 100 markets by year-end.
Lightspark won't sell Grid as a consumer app. It's an embedded product — platforms, fintechs, and developers integrate dollar accounts into their own services while Lightspark handles the backend, compliance, and rail connections. The pitch to a Brazilian remittance startup or an Indonesian gig-economy platform is straightforward: skip the year of regulatory work and the SWIFT integration, and offer your users a Visa-compatible dollar account on day one.
The AI angle is what got the keynote applause. Marcus introduced agent delegation — a feature that lets users grant AI agents scoped, revocable permission to spend from their Grid accounts. In a live demo using Bread, a Bitcoin wallet, a WhatsApp-based agent generated a single-use card for a coffee purchase and routed $500 to a contact in Brazil; both transactions executed without the user touching the wallet. "The agent plans, the policy decides, and the account enforces," Marcus said. "The user always stays in control."
That control claim is doing a lot of work. Existing card networks have no native concept of agent authorisation — when an AI runs a Visa charge, the network sees an ordinary cardholder transaction. Grid's policy layer sits above the network, scoping what an agent can do (which merchants, what amounts, for how long) and refusing transactions that fall outside it. Visa announced its own variant of this in mid-April, called Intelligent Commerce Connect; the difference is that Visa's version targets enterprises, while Lightspark's targets the developer and embedded-finance market.
The regulatory backdrop made the launch possible. Marcus credited the GENIUS Act in the United States and Europe's MiCA regime for the clarity that lets Lightspark operate as a stablecoin-handling principal member without bespoke licensing in every jurisdiction. He also noted that Spark — the Bitcoin layer Lightspark co-founded with several other wallet companies — has matured to the point of supporting stablecoins, which is the underlying mechanic that lets Grid hold dollar balances on Bitcoin rails at all.
The competitive picture is more crowded than Marcus suggested from the stage. Stripe's Tempo blockchain has been quietly onboarding validators including Visa itself; Stripe is building rails on similar premises. KuCoin announced last week that it had put USDC on Mastercard's rails in Australia. Charles Schwab opened spot Bitcoin and Ethereum trading to its 39 million customers. The race to make crypto settlement invisible inside conventional payment products is now a multi-front engagement. Lightspark's edge is the principal-member status and the AI-agent layer — neither competitor has both.
What Grid does not yet have is volume. Marcus did not disclose the number of accounts at launch or commit to a transaction-volume target. The platform is going live with a handful of integration partners and the demo wallet; the real test is whether developers building remittance, payroll, and agentic-commerce products choose Lightspark over the entrenched stack. The pitch is good. The numbers will tell the rest.
