Currently, there has been no official and verifiable announcement regarding Hyperliquid's "fiat trading feature testing." The fiat integration mentioned is actually achieved through third-party payment channels (on-ramps), rather than a native fiat trading system built by the exchange itself.
Understanding the differences between native fiat on-ramps, third-party payment channels, and stablecoins is crucial.
A native fiat on-ramp means that deposit and withdrawal functionalities are directly integrated into the exchange's internal system, involving complex aspects such as asset custody, payment licenses, and banking partnerships. This is fundamentally different from outsourcing the payment process to external service providers.
In contrast, fiat payment channels (on-ramps) operate independently of the exchange. Users purchase cryptocurrencies through third-party providers using credit cards or bank transfers, and then send the acquired assets to a wallet address that can interact with the exchange.
Stablecoins are tokenized representations of off-chain reserves. They can be traded on-chain like cash proxies, but their nature differs from the deposit and withdrawal operations of government-issued currencies conducted through the exchange itself.
Mercury and MoonPay Fiat Payment Channels: Operational Process, Identity Verification, and Regional Notes
MoonPay's CEO Ivan Soto-Wright has stated that the fiat access achieved through this integration will provide a "simple and intuitive" user experience.
In practice, users will initiate buy or sell operations within the Mercury platform, select the desired asset and payment method, and then complete the transaction through the payment channel provider. The cryptocurrency will subsequently be sent to a compatible wallet that can interact with Hyperliquid.
Using regulated payment channels typically requires identity verification and, depending on the provider and payment partners, jurisdictional eligibility checks, transaction limits, and applicable fees. Additionally, availability may vary by country and payment method.
USDH Stablecoin on HyperEVM: Its Issuance Mechanism and Differences from Fiat Deposits and Withdrawals
Regarding how USDH works and its claimed reserve support through Native Markets, research from Galaxy (https://www.galaxy.com/insights/research/stablecoin-usdh-ticker-hyperliquid) indicates that USDH is proposed by Native Markets as a stablecoin issued on HyperEVM, claiming its reserves are backed by off-chain fiat assets such as cash and U.S. Treasury bonds held by custodians.
This structure positions USDH as a fiat-referenced asset that can circulate on HyperEVM. Its reserve management and custody are conducted off-chain, while token transfers and transactions occur on-chain.
Why USDH is Not Equivalent to Direct Fiat Deposits and Withdrawals
Holding or trading USDH is a different concept from directly depositing U.S. dollars into an exchange. The issuance of stablecoins relies on reserve backing and redemption mechanisms, while native fiat on-ramps are responsible for end-to-end banking fund management.
On an operational level, stablecoins can provide dollar-denominated liquidity on-chain, but they do not establish a bank transfer-like deposit and withdrawal pathway for the exchange's core platform.
Frequently Asked Questions about Hyperliquid's Fiat Trading Feature Testing
Can I deposit or withdraw fiat directly on Hyperliquid, or must I use a third-party payment channel?
Currently, direct fiat deposits and withdrawals have not been confirmed. Fiat access is achieved through third-party payment channels on the Mercury platform, rather than the exchange's native system.