Your Coinbase historical data is the transaction history of your account: every buy, sell, send and receive. Coinbase gives it to you as a CSV report under Statements on the website.
Perly App imports transaction history from CSV files, the export every serious exchange offers and the one format that needs no API keys, no OAuth grant and no ongoing connection. The steps for Coinbase are below, with what to glance at before you import the file anywhere.
Exchange interfaces move; menu names drift. If a label above has changed, the feature is still there — search the exchange's own help for “export history CSV”.
Perly detects the columns, shows you every row it intends to write, flags likely duplicates and leaves them unticked. Nothing is written until you confirm it — a ledger you cannot trust is worse than no ledger, and the fastest way to an untrustworthy one is a silent import. Cost basis, PnL and ROI are then recomputed from your full history; the arithmetic is explained in Average cost vs FIFO.
The same export on other exchanges: Binance · Kraken. Why a CSV and not an API key: six questions to ask any tracker.
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