Dapp StoreEthereumNFT ToolsNFT APIs
OpenSea API
OpenSea API
Free CustomersNFT APIs

OpenSea API

OpenSea API is a developer API helping users make custom marketplaces with smart contracts easily.

Ethereum Logo
Open-source

What is OpenSea API?

Launched by the world’s largest NFT marketplace OpenSea in 2018, OpenSea API is a set of developer tools enabling users to create custom marketplaces powered by Ethereum smart contracts. Developers can create auctions in any currency, including their own tokens, and collect analytics with OpenSea.js. An NFT must be ERC721 or ERC1155 compliant to list on the marketplace. OpenSea is free, but to get an OpenSea API Key, developers need to fill out an application form.

Try web3's most versatile multichain NFT API
Get your API key
Is this your project?
Request edits

Best NFT APIs

Discover more web3 applications and developer tools.

See all dapps
Section background image

Build blockchain magic

Alchemy combines the most powerful web3 developer products and tools with resources, community and legendary support.

Get your API key