MetaMask
MetaMask is the canonical way to self-custody on Polymarket.
Prediction Markets 101 editorial team Updated April 16, 2026 1 min read
Definition
MetaMask is the most popular Ethereum/Polygon wallet, available as a browser extension and mobile app.
Plain-English explanation
You install MetaMask, create a wallet with a seed phrase, add the Polygon network, fund with USDC and MATIC, then connect to Polymarket. Every trade requires a MetaMask signature.