How can I view 0x21d63c6e's crypto portfolio?

You can view the full portfolio of 0x21d63c6e (0x21d6336c51d1e6b53b2756766614e680d1a33c6e) on Zerion at https://app.zerion.io/0x21d6336c51d1e6b53b2756766614e680d1a33c6e/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.