Returns a ready-to-sign transaction that applies the drop's saved edits onchain: stages, supply, base URI, payout, and the OpenSea signer, fee recipient, and payers the drop needs. Every value is computed by OpenSea; do not build or change this calldata yourself, or signed presales stop validating.

Send the transaction from from, the contract's onchain owner. Only the collection owner can call this endpoint.

Only ERC-721 SeaDrop V1 drops are published. An ERC-1155 self-mint drop has no publish step and returns 400: each of its items goes onchain through the transaction POST /api/v2/drops/{slug}/items returns.

A 400 carries the reason the drop cannot be published, for example that it is disabled, its launch date is still pending, it has no saved edits to apply, or a stage has a price while neither the saved edits nor the contract has a creator payout address (every paid mint would revert). After a first publish, the drop is live once GET /api/v2/drops/{slug} returns it, which happens after the transaction is mined and indexed.

To reveal, run POST /api/v2/drops/{slug}/metadata/ipfs, wait for it to complete, then call this endpoint again to put the new base URI onchain.

The transaction does not set a provenance hash or change contractURI(). SeaDrop only accepts setProvenanceHash() before the first token is minted, so a drop that wants one must send that call from the owner itself before minting starts; after the first mint it reverts.