Build your own OpenSea-powered marketplace

We've already built the largest marketplace for crypto collectibles, and now we want to help you build yours. OpenSea provides a robust suite of tools for developers building projects with blockchain-based digital assets.

Project developers can power their marketplace directly on OpenSea's infrastructure, gaining instant access to our full suite of ecommerce features and earning revenue every time a sale is made.

The most advanced marketplace feature set

OpenSea's platform provides the most powerful way for your users to buy and sell their items—auctioning, bidding, bundling, you name it. All developers get instantaneous access to our suite of marketplace features:

Product Listing

Items can be sold at a set price or gifted

Dutch Auctions

Item's price can fluctuate up or down in a set timeframe

eBay-style Bidding

Auction your items to the highest bidder

Bundle Sales

Items can be sold in groups

Time-tested, audited smart contracts

OpenSea is powered by the Wyvern Protocol, a set of robust Ethereum smart contracts specifically designed for buying and selling unique digital assets. The smart contracts are security audited and have been used in production with high-volume games. You won't need to deploy any additional smart contracts (other than your ERC721 or ERC155 contract) in order for your items to be instantly tradeable with our SDK.

Full customizability

You can tailor your marketplace exactly how you want it. Whether you're building with our instant OpenSea Storefront solution, on your own domain with our white-labeled integration, or with a DIY approach using the OpenSea SDK, you'll be able to get the exact look and feel you want for your marketplace experience.

Exposure on the largest decentralized marketplace

Thousands of users are already browsing OpenSea to discover the best-priced items. When you build your own OpenSea marketplace, your items will be instantly cross-listed onto the general OpenSea marketplace for discovery.

Earn revenue from secondary sales

Every time a user sells an item, they pay a fee — a percentage of the price it was sold. When you host a marketplace on OpenSea, you get a piece of this fee. With increased volume and increased exposure, this makes using OpenSea substantially preferable to building an isolated marketplace.

You can take a very small cut to encourage more trading, or a larger cut to try to maximize revenue.
The process is simple — simply specify the percentage fee you wish to take on secondary sales and an address to which the funds will be paid. To learn more about setting your fees, check out our docs.

Host your initial item sale on OpenSea

Many of our partners also host their initial item sales on OpenSea. This can be done entirely on the OpenSea platform, and is detailed in the OpenSea Crowd Sale Tutorial.

Alternatively, if you are looking to do something more custom, please reach out to our Help Center.