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Add USDC to Your Wallet

NCRB uses USDC (USD Coin) as the payment currency on the marketplace. To buy credits you need USDC in your wallet on the same network as the listing you want to purchase.

USDC is a stablecoin — 1 USDC = 1 US Dollar.

USDC Contract Addresses​

USDC is a separate token on each network. You need to add the correct contract address for each chain you plan to use.

NetworkChainUSDC Contract Address
Avalanche Fuji (testnet)431130x5425890298aed601595a70AB815c96711a31Bc65
Ethereum Sepolia (testnet)111551110x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238
XRPL EVM Testnet14490000x925965a6FCe11D0589dAD8972e7e5B8879bCb9ef

How to Add USDC in MetaMask​

The steps are the same for every network — just make sure you are on the correct network first.

Step-by-step​

  1. Open MetaMask and switch to the network you want to add USDC on (e.g. Avalanche Fuji Testnet)
  2. Scroll to the bottom of the token list and click Import tokens
  3. Select the Custom token tab
  4. Paste the USDC contract address for that network (see table above) into the Token contract address field
  5. MetaMask will automatically fill in:
    • Token symbol: USDC
    • Token decimals: 6
  6. Click Add custom token
  7. Click Import tokens to confirm

USDC will now appear in your MetaMask token list for that network.

Repeat for Each Network​

You need to add USDC separately on each chain you plan to use. Repeat the steps above after switching to each network:

  • Avalanche Fuji — 0x5425890298aed601595a70AB815c96711a31Bc65
  • Ethereum Sepolia — 0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238
  • XRPL EVM Testnet — 0x925965a6FCe11D0589dAD8972e7e5B8879bCb9ef

Get Testnet USDC​

Testnet USDC has no real value — it is used for testing the platform. You can get free testnet USDC from Circle's faucet:

Avalanche Fuji & Ethereum Sepolia​

  1. Go to the Circle USDC Faucet
  2. Select the network (Avalanche Fuji or Ethereum Sepolia)
  3. Paste your MetaMask wallet address
  4. Click Send — testnet USDC will arrive within a minute

XRPL EVM Testnet​

The XRPL EVM testnet uses a bridged USDC. Check the XRPL EVM Bridge or the NCRB support channels for current instructions on obtaining testnet USDC on XRPL EVM.

Get Mainnet USDC​

On mainnet you will use real USDC. You can acquire it from:

  • Centralised exchanges — Coinbase, Binance, Kraken (search for USDC, withdraw to your MetaMask address on the correct chain)
  • Avalanche Bridge — bridge USDC from Ethereum to Avalanche C-Chain at bridge.avax.network
  • On-ramp services — buy USDC directly with a card via MetaMask's built-in buy feature

Always double-check you are withdrawing to the correct network. Sending USDC to the wrong chain may result in permanent loss of funds.

Checking Your USDC Balance​

  1. Open MetaMask
  2. Make sure you are on the correct network
  3. USDC will appear in your token list with your current balance
  4. If it does not appear, follow the Add USDC in MetaMask steps above

What's Next?​

You are ready to use NCRB. Visit the NCRB Marketplace to browse available credits.

Need help? See the FAQ or visit our Support page.