Optional Metadata Fields

Sifr Zero is a Community Collection with a zero-barrier method for minting on-chain artwork directly to the Tezos blockchain. Designed and built by @JestemZero as an extension of the ZeroContract, Sifr Zero is inspired by the legacy of Hic et Nunc for an open art gallery.

Based on the "Extra Zero" version of the ZeroContract (v4), a full set of feature rich options are available to authors such as Ability to edit token Metadata, ExtraUri support for multiple art within one token, and File sizes that are nearly infinite.

The mint procedure integrates the technology from @Jams2Blues and his contract management suite. To manage your artwork, particularly if you need to repair a broken mint, use his ZeroUnbound.art toolset.


The mint processs is simple and straightforward. If you see a red border that means the information entered is not the proper format.

Optional Metadata can be left blank, but if included they also will turn red if not in the proper format.

Minting artwork that is a file under 18KB will take only one transaction to complete.

Minting artwork that is larger than 18KB will take multiple transactions and you will need to approve each one. Before you mint, a notice on anticipated total cost and transaction count will be display for approval.

On-chain minting takes a little bit of time, espeically for larger files, so do not get impatient. Relax, breathe and enjoy the process of joining the Community.

If you accidentally disrupt a multi-transaction mint, or if the network has an issue in the middle of the process, do not worry. Zero Unbound has a RepairUri tool so that you do not lose your $xtz.


Connecting to Ghostnet will let you test your mint safely to ensure everything is accurate and you do not spend $xtz until you are 100% ready.

Once artwork is minted to Mainnet it will show up immediately on Objkt.com (with a small delay for their indexing process) as well as on ZeroView, the gallery built by JestemZero to showcase all the ZeroContract artwork across collections.

Make great Art & Welcome to Sifr Zero!