One machine for the world’s dollar flows
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June 29, 2026
The US dollar is the settlement currency for global trade, and increasingly that dollar moves as a stablecoin. For PSPs, fintechs, neobanks, remittance companies, and B2B payment platforms, the ability to convert between fiat and digital dollars quickly and cheaply has become core infrastructure.
That conversion happens at the on-ramp and the off-ramp. Getting both right decides how fast you settle, how much margin you keep, and which corridors you can actually serve.
A USD on-ramp converts fiat into a US dollar stablecoin, typically USDC or USDT. You send USD or local currency and receive digital dollars you can move on-chain in minutes.
A USD off-ramp does the reverse: it converts a USD stablecoin back into fiat and delivers it into a bank account or local payment rail.
Together they form what the industry calls the “stablecoin sandwich”: fiat in, stablecoin in the middle, fiat out. The sender and recipient transact in regular currency, while the dollar stablecoin handles the cross-border leg. Neither side ever has to touch crypto directly.
Most cross-border stablecoin volume is denominated in dollars, and the US is the single largest destination for cross-border stablecoin flows, roughly $127 billion a month, according to Artemis.
The reason is simple: the dollar is already the world’s bridge currency, and USD stablecoins extend that role on-chain. McKinsey and Artemis estimate genuine stablecoin payments reached about $390 billion annualized at the end of 2025, with B2B making up roughly 60% of that and growing more than 730% year over year.
Regulation has accelerated the shift. The GENIUS Act, signed into law in July 2025, created the first US federal framework for payment stablecoins and requires full backing in cash and short-dated Treasuries, pushing dollar stablecoins further into mainstream payment flows.
If your business moves dollars across borders, book a demo with Codex FX to see how USD ramps could work across your corridors.
Moving dollars the traditional way runs through correspondent banking. A wire can take 2–5 business days, cost $25–50 before intermediary fees, and stop dead on weekends, holidays, and after local cut-off times.
For payment businesses, that friction compounds. Slow settlement ties up working capital, opaque spreads erode unit economics at volume, and many emerging-market corridors are hard to reach through legacy banks at all. When dollar movement is slow and expensive, it stops being a back-office issue and becomes a product problem.
Codex FX is a stablecoin-powered FX layer built for exactly this. It lets payment companies move between USD fiat, USD stablecoins (USDC and USDT), and local currencies through a single platform and API.
What that delivers:
Sub-30-minute settlement. Most transactions settle in under 30 minutes instead of 2–5 business days.
24/7/365 availability. Ramps run on weekends and holidays, not banking hours.
Wholesale pricing. Real-time quotes at OTC wholesale rates with tight spreads, so you see your rate and fees before every trade.
USDC and USDT, both directions. Convert fiat to either dollar stablecoin, swap between them, and off-ramp back to fiat without losing margin to poor execution.
Emerging and frontier coverage. Access dollar liquidity in markets legacy rails struggle to reach.
Compliance built in. KYB designed to take days, with onchain and offchain AML controls and institutional custody.
To compare your current USD ramp setup against wholesale stablecoin FX, book a demo with Codex FX.
An on-ramp converts fiat into a USD stablecoin like USDC or USDT. An off-ramp converts that stablecoin back into fiat and delivers it to a bank or local rail. Together they let businesses move dollars across borders using stablecoins as the settlement layer.
It depends on the provider and corridor. Legacy bank rails can take 2–5 business days. With Codex FX, most transactions settle in under 30 minutes, 24/7.
Codex FX supports both USDC and USDT, plus conversion between them and into USD and local fiat.
Codex FX gives PSPs, fintechs, and payment companies wholesale USD on/off-ramp pricing, sub-30-minute settlement, and broad currency coverage through one platform and API.
To see what that looks like for your corridors, book a demo with Codex FX.
