How can I view 0xc15e3d15's crypto portfolio?

You can view the full portfolio of 0xc15e3d15 (0xc15e233c570d31b6d57e0ab771dfd790d83d3d15) on Zerion at https://app.zerion.io/0xc15e233c570d31b6d57e0ab771dfd790d83d3d15/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.