Stablecoin · Optimism

Tether on Optimism (USDT)

Tether (USDT) is the largest US-dollar stablecoin, with one USDT designed to track one US dollar. It circulates across multiple chains, most heavily on Ethereum, Tron, and BNB Chain, making it a default rail for crypto payments and settlement. On Optimism, USDT moves as a ERC-20 token: transfers pay Optimism network fees in ETH and settle with the network's own finality. Every U.CASH rail that runs on Optimism, from checkout to swap, supports USDT natively on this chain. On Optimism the canonical Tether contract now trades as USDT0, the omnichain standard; the bridged flavor also circulates and U.CASH watches both.

Swap USDT on Optimism → Buy USDT

Open in the app: Swap · Buy · Get UCASH

Tether on Optimism at a glance

Network
Optimism
Standard
ERC-20 token
Block time
~2 seconds
Consensus
Optimistic Rollup (OP Stack)

USDT transfers confirm with the Optimism network (~2 seconds blocks). Settlement on U.CASH is non-custodial: every payment and swap moves on-chain, direct to a wallet you control.

Tether on Optimism contract addresses

Tether on Optimism (USDT) is a token. Always verify the address before trading.

Optimism0x01bFF41798a0BcF287b996046Ca68b395DbC1071

Use USDT on Optimism

Every action opens with USDT already selected.

Swap USDT

Best-price routing from Optimism into any asset, cross-chain included, in one signed transaction.

Open the swap →

Buy USDT

Card or bank where the fiat rails serve Optimism, or swap from any asset you already hold.

Buy USDT →

Get UCASH with USDT

Pay USDT from Optimism and receive UCASH, the U.CASH network token, non-custodial.

Get UCASH →

Related on U.CASH

Tether (USDT)

The largest US-dollar stablecoin, live on Ethereum, Tron, and BNB Chain.

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Tether on Tron (USDT)

Tether (USDT) on Tron.

Overview →

Tether on BNB Chain (USDT)

Tether (USDT) on BNB Chain.

Overview →

Tether on Polygon (USDT)

Tether (USDT) on Polygon.

Overview →

Optimism (ETH)

Ethereum L2 and home of the OP Stack.

Overview →

Tether on Optimism: FAQ

What is the USDT contract address on Optimism?
0x01bFF41798a0BcF287b996046Ca68b395DbC1071. It is the verified ERC-20 token deployment listed above with its explorer link. Always check the address before you trade or accept USDT on Optimism.
How do I swap USDT on Optimism?
Open swap.u.cash/usdt-optimism and the pair arrives prefilled: USDT on Optimism as the asset you pay. Pick what you want to receive, confirm the route, and your wallet signs one transaction.
How fast are USDT transfers on Optimism?
Optimism runs Optimistic Rollup (OP Stack) with ~2 seconds blocks, and USDT settles with the network. U.CASH watches confirmations per your checkout policy.
Can I move USDT from Optimism to another network?
Yes. The same swap screen routes cross-chain in one signed transaction: choose a destination network and the router bridges alongside the trade, so the output lands as USDT (or any asset you pick) on the other chain.
What does it cost to use USDT on Optimism?
You pay the Optimism network fee in ETH for each transfer. Swaps carry a flat, transparent fee shown before you confirm; there are no spreads or hidden routing cuts.
What is USDT0 on Optimism?
USDT0 is the omnichain rebrand of Tether's canonical USDT contract on Optimism (0x01bFF41798a0BcF287b996046Ca68b395DbC1071). Same token, same issuer. The bridged flavor (0x94b008aA00579c1307B0EF2c499aD98a8ce58e58) is the dominant legacy variant and is also watched by the rails.
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Tether on Optimism, your keys

Swap, buy, and settle USDT on Optimism non-custodial, straight to the wallet you control.

Swap USDT on Optimism → Buy USDT