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Creating an access request does not spend escrow. Payment happens when your backend reads approved data from the user’s Personal Server — each successful read draws the data_access fee from your app’s escrow balance. Fee amounts and assets are set onchain in FeeRegistry and can change, so treat any number you see quoted as an example, not a fixed price. Check current values in the Fund escrow panel of Vana Account, or on the contract directly:
How much will you need? A rough amount to fund is expected reads × per-read fee — for example, to test 10 reads, fund about 10 × the per-read fee plus a small buffer. You don’t need a large balance to start: fund enough for your first batch of reads and top up escrow anytime.