Mercado Bitcoin has become the first Brazilian exchange to support transfers on Sui, opening a direct local route into the Layer 1 network for its large Brazilian customer base. According to the Sui Foundation’s official announcement, Mercado Bitcoin’s 4.5 million clients can now buy, sell, send and receive SUI, USDC and USDsui through the platform. The exchange separately confirmed that customers can fund accounts in Brazilian reais through Pix before converting into the supported Sui assets.
The integration also connects Sui to Mercado Bitcoin’s existing regulated financial infrastructure. The company operates as a payment institution authorized by Brazil’s central bank and as a securities broker under the CVM, while USDsui is being added as collateral to its lending product. The companies are separately exploring a future Hashi integration and bringing Mercado Bitcoin’s tokenized-asset platform onto Sui, but neither initiative should be treated as already operational. Mercado Bitcoin explicitly says any Hashi product remains under study and would require internal governance and compliance with Brazilian regulation.
Gasless Payments and Stablecoin-Paid Fees Are Different
The Brazilian rollout arrives after Sui already introduced protocol-level gasless stablecoin transfers in May. Supported peer-to-peer transfers can execute with a gas price of zero, meaning users do not need SUI simply to move eligible stablecoins such as USDC or USDsui. This is a genuine zero-fee mechanism at the protocol level rather than a third party paying or reimbursing the network fee. Eligibility is constrained to allowlisted tokens and specific transaction operations, so the mechanism does not make arbitrary Sui transactions free.
Slush Wallet has addressed that wider transaction set differently. Its October 28 update lets users pay network fees with stablecoins when swapping, staking, unstaking, depositing or withdrawing, extending an earlier option for sends and payments. Paying gas in a stablecoin through Slush is distinct from Sui’s zero-gas stablecoin transfer feature because those more complex operations still incur network fees. The wallet changes which asset users need to manage for those costs rather than eliminating gas from all Sui activity.
That distinction is increasingly relevant as Sui expands payment access beyond crypto-native wallets. The network is also being integrated into Samsung Wallet for USDC transfers, while payment providers such as RedotPay have already added native USDC and SUI settlement rails. Infrastructure availability demonstrates that the payment stack is broadening, although the Mercado Bitcoin announcement does not disclose initial trading volume, transfer volume or customer adoption.
Tokenized Gold Adds a Separate RWA Layer
Sui’s latest ecosystem expansion also includes XAUa, a gold-backed asset distributed through TBook and minted using Sui’s Permissioned Asset Standard. TBook’s current documentation identifies XAUa as a commodity token representing one gram of gold and requires wallets to be whitelisted before transacting. Deposits and redemptions use a T+3 settlement cycle. The Permissioned Asset Standard allows transfer eligibility rules to be enforced onchain, making XAUa structurally different from an unrestricted fungible token.
The product’s regulatory description requires more caution. Sui and TBook have referred to XAUa as Hong Kong-regulated, but Alpha Digital Assets Ltd.’s terms state that the company is not registered, licensed or regulated by the Hong Kong SFC, HKMA or any other financial regulatory authority. Those same terms expressly reference XAUa. Without a named regulator or clearer legal documentation connecting the token to a regulated issuer structure, the available evidence supports describing XAUa as a permissioned gold-backed product rather than independently confirming its advertised regulatory status.
The Mercado Bitcoin integration is therefore the clearest immediately measurable development: Brazilian customers now have a local exchange route for Sui assets and Pix-funded access to the network. Future Hashi integration, RWA issuance and broader stablecoin usage remain separate adoption milestones. The significance lies in production access that exists today, while usage levels and the scale of the planned financial integrations still need to be demonstrated.