How can I view 0xc4df9db2's crypto portfolio?

You can view the full portfolio of 0xc4df9db2 (0xc4dfab7f51e52e543571e36e14580fcd8bd49db2) on Zerion at https://app.zerion.io/0xc4dfab7f51e52e543571e36e14580fcd8bd49db2/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.