How can I view 0xefd31266's crypto portfolio?

You can view the full portfolio of 0xefd31266 (0xefd365ca802c8b7df82387cef6683fd439f91266) on Zerion at https://app.zerion.io/0xefd365ca802c8b7df82387cef6683fd439f91266/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.