What is an Optimistic Oracle?

An Optimistic Oracle assumes submitted data is correct and finalizes it after a dispute window (usually 2 hours). Anyone can dispute incorrect data by staking tokens, triggering a vote among UMA holders.

Can I swap UMA without KYC?

Yes. SyntheticSwap supports UMA swaps with no registration or identity verification.

How does Across Protocol use UMA?

Across Protocol uses UMA's Optimistic Oracle to verify cross-chain bridge transfers. Relayers front liquidity, and the OO confirms transactions are valid before settlement.

What happens if I dispute incorrect oracle data?

If you correctly dispute bad data, you earn a portion of the disputer's stake. UMA token holders then vote on the correct answer, and the losing party's bond is slashed.

What can UMA's oracle prove?

UMA can prove almost any verifiable real-world data: price feeds, sports results, election outcomes, insurance claims, bridge transaction validity, and custom yes/no questions.

Home/Supported Coins/UMA Protocol

UMA Protocol

Optimistic Oracle and Synthetic Asset Protocol for DeFi

Launch Year

2020

Consensus

Proof of Stake

Max Supply

113,534,649 UMA

Block Time

~12 seconds

UMA

UMA Protocol

Price—

24h Change—

Market Cap—

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Swap UMA Now

No KYC or registration
Non-custodial — your keys, your crypto
1000+ supported exchange pairs
Best available exchange rate

UMA Protocol Price Chart

UMA / USD

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About UMA Protocol

UMA (Universal Market Access) Protocol is a decentralized financial contracts platform that enables the creation of synthetic assets and uses an Optimistic Oracle (OO) to resolve disputes. UMA's Optimistic Oracle provides any verifiable data to smart contracts — including price feeds, real-world data, and custom logic — using an optimistic assumption that correct data is submitted, with economic dispute resolution as the safeguard. The oracle is used by major DeFi protocols including Across Protocol (the fastest cross-chain bridge), Polymarket (prediction markets), and dozens of others. UMA token holders act as arbitrators in data disputes, earning rewards for honest participation.

History

2018

UMA Protocol founded by Hart Lambur and Allison Lu (ex-Goldman Sachs); concept for decentralized synthetic assets.

2020

UMA mainnet launches; ETHBTC synthetic token becomes first UMA-powered synthetic asset.

2021

UMA Optimistic Oracle launches as a standalone oracle service; adopted by multiple DeFi protocols.

2022

Across Protocol (fast cross-chain bridge) launches using UMA's Optimistic Oracle for dispute resolution.

2023

UMA Optimistic Oracle V3 launches with improved flexibility and lower gas costs.

2024

UMA oracle secures billions in cross-chain bridge value via Across Protocol; adoption continues growing.

How to Swap UMA

Swapping UMA Protocol (UMA) on SyntheticSwap requires no registration or KYC. UMA operates across multiple chains including Ethereum, making it compatible with MetaMask, Trust Wallet, Ledger, and most major Web3 wallets. Open SyntheticSwap, select UMA as your source or destination asset, enter your receiving wallet address, and confirm the floating rate. After sending UMA to the provided deposit address, the destination asset is delivered directly to your wallet. No personal information is ever collected — fully non-custodial.

How to Store UMA

UMA (ERC-20) is stored in MetaMask, Ledger, Trust Wallet, or any Ethereum wallet. For participating in UMA's oracle dispute resolution and earning rewards as a voter, visit vote.uma.xyz.