UMA Oracle

UMA (Universal Market Access) is the oracle protocol Polymarket uses to resolve markets on its international platform.

Here's how it works:

When a market is ready to be resolved, users can propose an outcome through the UMA oracle by posting a $750 bond. If the outcome goes unchallenged, the market resolves to that outcome and the proposer earns their bond back plus a $2 reward. If it's disputed, it goes to a vote, where oracle participants decide how the market should resolve. If the proposer loses, they lose their bond.

Example: How UMA's Optimistic Oracle resolves a market

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Watch: UMA's Optimistic Oracle Explained (3 min)