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A quick reference for the networks and currencies you can use. These are the values the API accepts today; more are added over releases.

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Blockchain networks

An account is pinned to one network when it’s created, and its wallet lives there.
chainNotes
BASEEthereum L2.
AVALANCHEEVM C-Chain.

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Stablecoins

Crypto balances, transfers, and permits use these assets (the asset field):
assetPegged to
USDCUSD
EURCEUR
USDTUSD
USDSUSD
The contract address for an asset on a given chain is returned by the API — see contractAddress in list wallets balances and in wallet allowances. Read addresses from the API rather than hard-coding them.

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Fiat currencies

Fiat-denominated operations (fiat transfers, payment requests, pay-in sessions) accept:
currency
EUR
USD
GBP
Virtual bank accounts currently support EUR only — creating one provisions a EUR_SEPA IBAN. The other currencies are accepted for fiat-denominated operations, but not yet for IBAN provisioning.

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How fiat converts to crypto

Fiat-denominated operations resolve to a stablecoin and settle on-chain. You name the target stablecoin — for example targetCryptocurrency on a virtual bank account, or the asset a pay-in session converts to. A fiat transfer reports the conversion it used in its fiatOrigin block (currency, amount, exchange rate).

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Next steps

Wallets & balances

Per-asset balances on an account’s wallet.

Transfers

Move these assets between accounts.