How can I view 0x18c31b16's crypto portfolio?

You can view the full portfolio of 0x18c31b16 (0x18c3879fd1b97542cedbc3d4cb53e9a652301b16) on Zerion at https://app.zerion.io/0x18c3879fd1b97542cedbc3d4cb53e9a652301b16/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.