Launched in 2022, BlockSpan’s NFT API platform enables devs to build applications that seamlessly retrieve token prices, ownership, exchange data, and metadata (including images) in real time. The API supports ERC721 and ERC1155 token standards on Ethereum, Polygon, Arbitrum, and more. BlockSpan collates NFT metadata, ownership details, pricing history, and cached images across blockchains, which developers can access with a few clicks on its API layer. As of October 2022, Blockspan's API has powered over 1 billion token transfer transactions and supports 300M tokens.