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Portfolio wallets support different chain sets for deposits and withdrawals.

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Production

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Deposits

Ground returns deposit addresses for these production chains:
  • Arbitrum
  • Base
  • Ethereum
  • Polygon
  • Solana

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Withdrawals

Ground supports USDC withdrawals to these production chains:
  • Arbitrum
  • Base
  • Ethereum
  • Polygon
  • Solana
If a chain is unsupported for the action you’re attempting, the API returns a 400 error with details.

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Sandbox

Sandbox uses explicit testnet chain keys in both responses and request parameters. For example, use ethereum_sepolia instead of ethereum. Currently sandbox supports:
  • ethereum_sepolia — Ethereum Sepolia testnet
Production uses canonical chain names (arbitrum, base, ethereum, polygon, solana).
NOTE: USDC deposits and withdrawals on some chains may require an additional 20-30 minutes to bridge via CCTP. More documentation to follow on this.