How can I view 0x90c7420c's crypto portfolio?

You can view the full portfolio of 0x90c7420c (0x90c7641addeb48b1b0ba4965e9aa1cfbf701420c) on Zerion at https://app.zerion.io/0x90c7641addeb48b1b0ba4965e9aa1cfbf701420c/overview — including token balances, DeFi positions, NFTs, and transaction history across 20+ chains.

How can I access wallet portfolio data programmatically?

Use the Zerion API at https://developers.zerion.io to query any wallet's portfolio, token positions, DeFi positions, NFTs, and transaction history programmatically.