Free NFT mints on Base: what buyers pay in gas and what creators store

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A creator explains that a free mint on Base charges the buyer no mint price, so the buyer pays only the transaction gas, which varies with network conditions. The expected cost is estimated by multiplying the wallet's gas estimate by the current gas price, with the confirmed receipt as the final record. The author describes preloading token URIs on-chain at about 0.0000008 ETH each, versus lazy minting, which shifts that storage cost to the mint path. A contract limit of five mints per wallet applies to the deployer too, so tests should use a fresh address. The piece also stresses that pinning metadata before exposing a mint is necessary, since on-chain URIs do not guarantee the content exists.

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