For information on changes for our US clients, please visit our Support Center article.

Bitcoin currency code: XBT vs BTC
As of April 26th, 2021, Kraken changed to using "BTC" for most purposes. "XBT" is still used for API, Futures API and logs downloads, OTC desk and History Exports.

Being that Bitcoin is decentralized, there is no standard, nor governing body, to dictate what notation should be used for it. Nonetheless, "BTC" has been the generally accepted abbreviation for Bitcoin stemming from the early days of Bitcoin.
The abbreviation "XBT" comes from the International Standards Organization (ISO) that maintains a list of internationally recognized currencies. The standard dictates that if a currency is not associated with a particular country, it should begin with an “X”, hence "XBT". Another example of this is the abbreviation for gold, "XAU".
Below is a list of Assets currently on Kraken that retain the X and Z Prefixes. Please note that this list is subject to change. We recommend making use of our Asset Info endpoint for the most up to date information.
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XETC: ETC
XETH: ETH
XLTC: LTC
XMLN: MLN
XREP: REP
XXBT: XBT
XXDG: XDG
XXLM: XLM
XXMR: XMR
XXRP: XRP
XZEC: ZEC
ZAUD: AUD
ZCAD: CAD
ZEUR: EUR
ZGBP: GBP
ZJPY: JPY
ZUSD: USD
XBT: BTC
XDG: DOGE