Build your own marketplace in minutes

OpenSea provides a one-stop shop for creating your own customizable marketplace for your non-fungible token (NFT) project. Allow users to smoothly buy and sell your items, get custom stats and analytics, and earn revenue when your items get traded.


Open your own marketplace

Let your users freely trade your ERC721 and ERC1155 items by opening your own marketplace on OpenSea.


You can finally open a beautiful, customizable marketplace on your own domain, fully integrated into your project.

Set your own fee

You can set your own fee on the secondary sales of your items on OpenSea. Whenever a user makes a sale, you earn a commission.

Get stats & insights

Get stats and insights to see how your collectibles are trending.

Get Started
opensea get listed

Run your own crowd sale

Sell the items in your game to an initial user base of early adopters. Even sell off items in your own token.

sell crypto packs of items

Sell packs of items

Instead of individual items, you can finally sell packs of items to give more to your users.

Airdrop items to users as rewards

Airdrop items to users as rewards

Reward your users with items to grow your app's user base.

Create lootboxes

Create lootboxes

Create lootboxes to gamify your app and build engagement.

Power your in-app economy with OpenSea.js

Buy, sell, & bundle

• Enable users to instantly create auctions (without paying gas) in any currency of their choosing.
• Let users bid directly on items.
• Allow users to create multi-item bundles (even with items from other games!)

Easily pull in data on your assets

• Access the OpenSea API with a JavaScript wrapper, allowing you to search assets, collections, users and more

View Developer's Kit
opensea api
opensea api

Fetch assets with our API

OpenSea provides an HTTP API for fetching non-fungible ERC721 assets based on a set of query parameters. Wallets and websites can now display:


Get assets filtered by a particular collectible type, or belonging to a particular wallet address


Get events happening on all assets (not just on our marketplace), including sales, listings, bids, transfers, and more


Get usernames and profile details for account addresses

View API Reference

Build on the largest marketplace for cryptogoods

With over 4 million assets, 135+ dapps, and 4,000 ETH in monthly volume, OpenSea is the largest marketplace for the decentralized web. We've built a set of robust marketplace tools, and we're making them openly available for developers.

largest cryptocollectibles



largest asset types


Asset Types

Number 1 in Market Volume


Market Volume

the largest cryptomarketplace

Trusted by top wallets & websites

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Read our FAQ's

Still have questions about how to develop with OpenSea and get started?

Read FAQ's


For support, please refer to our help center.

Help center

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Chat with us and other developers in our Discord community in our #developers channel.

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