Foundation is an Ethereum-based marketplace for digital art that became known for two things: a community invite system that controlled who could sell, and reserve auctions that turned each drop into a short, public event. If you are building a marketplace for emerging artists, those mechanics are the core of the model; the rest is a fairly standard NFT stack.
How Foundation worked
Foundation launched in early 2021. Rather than letting anyone mint, it began with a creator invite system: existing artists received invites to pass on, and the community could upvote applicants. That gave it a curated feel without a central jury, and it made early collectors more confident that work was original.
The invite gate was later removed so any creator could join, and the product expanded beyond one-off auctions into editions, drops and curated exhibitions. The shift says something useful: hard curation helps you build reputation early, but it limits growth, and most curated marketplaces eventually loosen it.
The reserve auction
Foundation's signature mechanic is the reserve auction:
- The artist lists a piece with a reserve price.
- Nothing happens until someone bids at or above the reserve. That first bid starts a 24-hour countdown.
- Bids placed in the final 15 minutes extend the auction by 15 minutes, which removes last-second sniping.
- When the timer ends, the winner settles and receives the NFT.
It is a variation of an English auction, tuned for social media: the countdown gives collectors a reason to share and come back. Dutch auctions (price falls over time) are the main alternative and fit better for editions where you want price discovery across many identical items. Our auction portal guide compares auction formats in more depth.
Fees and royalties
Foundation historically took a larger cut on primary sales than on secondary sales, and paid artists a fixed royalty on resales made on its platform. Like every marketplace, it cannot force other venues to honor those royalties; the token standard EIP-2981 only reports them.
Creator-owned contracts
Foundation moved toward letting artists mint into their own collection contracts rather than a single shared contract. That matters to serious artists, because their work stays identifiable and portable if the platform changes.
Building a Foundation-style marketplace
Contracts
- Collection factory deploying minimal-proxy ERC-721 contracts per artist, with EIP-2981 royalty info.
- Auction house that escrows the NFT, holds the highest bid, refunds outbid bidders automatically, and enforces the timer and extension rule.
- Buy-now and offers for pieces that do not go to auction.
- Payment splitter for collaborations, so proceeds split on-chain between artists.
One detail that trips up first-time builders: refunding the previous bidder inside the bid transaction can fail if that bidder is a contract that rejects ETH. Use a pull-payment fallback (credit the refund for later withdrawal) so a malicious bidder cannot block the auction.
Curation layer
Decide how artists get in: invites, an application reviewed by curators, or open sign-up with curated featuring. Whatever you choose, build tooling for identity checks and plagiarism detection. Art marketplaces attract copied work quickly.
Storage
Store media and metadata on IPFS or Arweave, pin it yourself, and give artists the content hashes. Collectors care that the art does not disappear if your company does.
What to copy, what to change
- Copy the reserve auction with time extension. It is simple and fair.
- Copy artist-owned contracts.
- Change the curation model as you grow; plan the path from invite-only to open with featured curation.
- Change the assumption that royalties are guaranteed. Consider contract-level enforcement if royalties are central to your pitch.
- Add cheaper chains. Mainnet gas makes low-priced work hard to sell; many art platforms now support L2s such as Base.
For a comparison with a more exclusive 1/1 model, see our SuperRare-style marketplace guide, and for the general art vertical, NFT marketplace for art.
Effort
A curated single-chain auction marketplace is one of the more contained NFT builds: you only index what is minted on your platform. As a rough estimate, a team of two to three engineers plus a designer can reach an audited launch in about three to four months, with the auction contract getting the most testing attention.
Frequently asked questions
Why use a reserve auction instead of a fixed price?
For one-of-one work by artists without an established price, auctions discover price and create a public moment. Fixed prices work better for editions and for artists with steady demand.
Should a new marketplace be invite-only?
Invite-only can help early reputation and quality, but it caps growth. Many teams start curated and later open sign-up while keeping editorial featuring.
Which chain is best for an artist marketplace?
Ethereum mainnet still carries prestige for high-value art; L2s such as Base make lower-priced work viable. Supporting one of each is a common pattern once the core is stable.
How do I handle outbid refunds safely?
Attempt the refund, and if the transfer fails, record it as a balance the bidder can withdraw. Never let a failed refund revert the new bid.