How can I view 0xa66b4e40's crypto portfolio?

You can view the full portfolio of 0xa66b4e40 (0xa66b94b8bdf0f29a732f9ca0f7bbcbf8a4ce4e40) on Zerion at https://app.zerion.io/0xa66b94b8bdf0f29a732f9ca0f7bbcbf8a4ce4e40/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.