Rarible and Metal Blockchain are partnering to bring cross-chain NFT trading to the Metal Pay app. This integration will make it easier for Metal Pay users to buy, sell, and trade NFTs from different blockchains with a single wallet. It will also help to increase the overall liquidity of the NFT market and bring NFTs to a wider audience. The integration is expected to be launched in Q4 2023 and will support Ethereum, Polygon, and Solana NFTs at launch.