MetaVisa is a middleware protocol in the Web3.0 space that aims to become the decentralized identity and credit system in the metaverse. Leveraging blockchain data, cloud computing, machine learning technologies, and model algorithms like logistic regression, decision trees, and random forests, the MetaVisa Protocol conducts comprehensive processing and evaluation of data across various dimensions including credit history, on-chain behavior preference, address activity level, asset holdings and portfolio, and address correlation. The MetaVisa Credit Score system assigns ranked badges to users based on their MCSs, with higher MCSs earning high-ranking badges and gaining privileges in services provided by various DApps.