How can I view 0x12121212eth's crypto portfolio?

You can view the full portfolio of 0x12121212eth (0x4fa188beffea62f2c3aeec7babfd93aea27c6bdc) on Zerion at https://app.zerion.io/0x4fa188beffea62f2c3aeec7babfd93aea27c6bdc/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.