Create external account

Register and authorize one of an investor's own blockchain addresses as an external account.

• The returned walletId is the identifier to use as a stablecoin-transfer withdrawal destination on create withdrawal order, and the address a stablecoin deposit must originate from.
• network must be one of the networks enabled for the environment, and address must be a valid address for that network's family.
• The address must not already be assigned to another investor (409). Re-submitting an address whose account was previously archived reopens that account and returns its original id.
• An investor may hold at most 100 active external accounts (409).
• Whitelisting is submitted on-chain asynchronously: a success response means the transaction was launched, not yet confirmed.

⚠️ Only register addresses the investor actually controls. Spiko does not verify ownership on this endpoint, and the address is authorized for payouts on your assertion alone.