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AgentCash creates and manages a local wallet that holds USDC for paying premium APIs. The wallet is created automatically the first time you use AgentCash.

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Where is the wallet stored?

Your keys live under ~/.agentcash/ with restricted file permissions (600):
  • wallet.json — EVM keypair (covers Base and Tempo)
  • solana-wallet.json — Solana keypair
Each file contains a private key, its address, and a creation timestamp.
Private keys are stored in plaintext on disk. Do not share these files or commit them to version control. Anyone with the keys can spend your USDC.

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Using an existing key

To use specific private keys, set environment variables: 
export X402_PRIVATE_KEY=0xYOUR_EVM_PRIVATE_KEY       # hex-encoded, 32 bytes
export X402_SOLANA_PRIVATE_KEY=YOUR_SOLANA_SECRET_KEY # base58-encoded
Either variable can be set independently. You can choose to omit one if you don’t want to use that chain. Useful for CI/CD environments or when you want multiple machines to share a wallet.

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Checking your balance

Ask your agent:
What is my AgentCash balance?
Or use the CLI directly: 
npx agentcash balance
This returns your total USDC balance across supported networks. If you need deposit links or network-specific wallet addresses, run: 
npx agentcash accounts
This returns the per-network account list, including each address, balance, and deposit link.

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Wallet addresses

Your wallet exposes two addresses:
  • A single EVM address that receives USDC on every supported EVM network (Base, Tempo).
  • A separate Solana address for USDC on Solana.
Run npx agentcash accounts to see each one along with its current balance and deposit link. See networks for the full list.