How can I view 0x5912ca12's crypto portfolio?

You can view the full portfolio of 0x5912ca12 (0x59128e93bc810a1bf673b1d4a1fd1635fb53ca12) on Zerion at https://app.zerion.io/0x59128e93bc810a1bf673b1d4a1fd1635fb53ca12/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.