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Calibri is fully non-custodial. Your USDC sits in your own Gnosis Safe on-chain — owned by your keys, never ours — and Calibri has no ability to move it, with one narrow exception: the bridge module can move USDC you sent to your address on another supported network, and only to your own Safe on Polygon. See Deposits from other networks. You authorise every trade by signing; the operator relays the signed order and pays the gas. The practical consequence: your funds are withdrawable even if Calibri is offline, because withdrawal is a transaction against your own Safe, not a request to a company.
Two setups lead to the same Safe — a passkey (Face ID / Touch ID) or a wallet you already use (MetaMask, Coinbase Wallet, Rainbow, WalletConnect). They differ only in what owns the Safe. See Your wallet options.

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How it works, end to end

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You only ever sign

Signing is the whole of your involvement in the on-chain machinery. You never need to hold a gas token, approve a network fee, or send a transaction yourself:
  • Deploying your Safe and signer contracts — operator pays, on first deposit
  • Approvals that let the exchange settle your trades — operator relays
  • Settlement of a matched order — operator relays
  • Redeeming a winning position — operator relays
What the operator cannot do is move your funds without a signature from you. The one exception is the bridge module, which can only carry USDC sent to your address on another supported network to your own Safe on Polygon — see Deposits from other networks.

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No fee at settlement

Winning shares redeem for the full 1.00 USDC each — there is no fee at settlement or redemption. The platform fee is charged once, at trade time (the taker fee). Any older wording that says winners redeem “1.00 minus a settlement fee” is incorrect.

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What you are responsible for

Self-custody cuts both ways. Because only you can move your funds:
  • Nobody can recover your wallet for you. Calibri holds no key and no backup. Keep your passkey synced to a keychain, or your wallet’s recovery phrase safe — and consider adding a signing key, a second key of your own that can still reach the funds if the first one is lost.
  • Winnings are claimed, not delivered. A resolved market makes your winning token redeemable; it does not push funds to you. See Redeeming winnings.

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Next steps