Crossmint’s Wallet Balance APIs allow you to retrieve and manage wallet balances efficiently across networks.

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Prerequisites

Check out our Quickstart for non-custodial Smart Wallets to prepare the following:

  • API Key: Your Crossmint API key with the following scopes: wallets.read, wallets:balance.read, and wallets.fund.
  • Wallet Locator: The locator of the wallet you want to check the balances from. Check the API Reference for more information.

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Retrieving Wallet Balances

We will use the Get Wallet Balance API.

It requires the following parameters:

  • walletLocator: The unique identifier for the wallet.
  • currencies: The cryptocurrencies to query, such as eth, usdc.
  • chains: (Optional) The blockchain networks to query, such as base-sepolia, sepolia.

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Funding a Wallet

In Staging, we have a faucet that you can use to fund your wallet with USDC. Use the POST endpoint /v1-alpha2/wallets/:walletLocator/balances. It requires the following parameters:

  • walletLocator: The unique identifier for the wallet.
  • currency: The cryptocurrency to fund the wallet with. We currently support usdc.
  • amount: The amount of cryptocurrency to send to the wallet.
  • chain: The network to use for the transaction. Only in Ethereum.