Returns ready-to-sign transaction data for minting tokens from a drop. The caller is responsible for signing and submitting the transaction. No wallet authentication is required, only an API key. The minter address in the request body determines who will receive the tokens. Stage selection is handled automatically by the backend: if multiple stages are active, the first eligible stage is used.

Supports ERC-721 SeaDrop V1 drops only; an ERC-1155 drop returns 400.

A 422 means the drop is mintable but this mint is not: the minter is not on the active presale's allowlist (the message names the stage and when the public stage opens), the quantity is over the wallet's limit or the remaining supply (the message says how many remain), the minter cannot pay the price and gas, or the active stage has a price and the drop has no creator payout address, so every paid mint would revert until the creator sets one.