First USDC Deposit on Base: Choosing a Wallet, Network and Amount for Your API Credit

Why Base and USDC?

Base is an Ethereum Layer 2 network that offers low transaction fees and fast confirmation times. USDC is a stablecoin pegged to the US dollar, making it ideal for topping up API credits without volatility. By using USDC on Base, you can fund your account quickly and start making API calls to multiple models with a single key.

Choosing a Wallet That Supports Base

Not all wallets support Base out of the box. Here's what to look for:

• Network support: Ensure the wallet allows you to add custom networks or has built-in support for Base.
• USDC compatibility: The wallet must be able to hold and send USDC on Base (this is the Base-native USDC, not USDC on Ethereum or other chains).
• User experience: Consider wallets with clear network indicators and transaction previews to avoid mistakes.

Popular options include MetaMask, Coinbase Wallet, Rainbow, and Trust Wallet. All of these support Base and USDC on Base.

Avoiding Wrong-Chain Sends

The most common mistake is sending USDC on the wrong network. For example, sending USDC on Ethereum mainnet to a Base address will result in lost funds.

• Always double-check the network: Before sending, confirm that your wallet is set to the Base network and that the recipient address is expecting USDC on Base.
• Use the deposit address provided: When you initiate a deposit on the API credit platform, it will give you a specific address. Send only USDC on Base to that address.
• Test with a small amount: For your first deposit, send a small amount to verify everything works correctly before moving larger sums.

Sizing Your First Deposit

Your first deposit should cover a small test batch of API calls. Consider the following:

• Model costs: Different models have different per-token prices. Check the official pricing for the models you plan to use.
• Call volume: Estimate how many calls you want to make for testing. A simple test might involve a few dozen calls with short prompts.
• Buffer: Add a small buffer to account for unexpected usage or price fluctuations.

Since you pay the official price multiplied by 1.3, your credit balance will be consumed accordingly. For example, if a test batch would cost $1 at official prices, you'd need $1.30 in credit. Start with an amount that lets you experiment without committing too much.

Step-by-Step Deposit Process

1. Set up your wallet: Install a wallet that supports Base and add the Base network if needed.
2. Acquire USDC on Base: You can buy USDC on an exchange and withdraw it to your wallet on Base, or bridge from another chain.
3. Get your deposit address: Log in to your API credit account and navigate to the deposit section. Copy the provided USDC on Base address.
4. Send USDC: In your wallet, initiate a send of USDC on Base to the copied address. Confirm the network and amount.
5. Wait for confirmation: Transactions on Base confirm quickly. Once confirmed, your credit balance should update.
6. Start testing: Use your API key to make a few calls and monitor your usage.

After Deposit: Using Your Credit

Once your credit is topped up, you can call any supported model (Claude, GPT, DeepSeek, Qwen, GLM, Kimi, etc.) with a single API key. Your usage is deducted from your balance at the rate of official price × 1.3. If you contribute keys, you earn credits at official price × 1.1 (or × 1.2 for premium) in USDC.

Remember: no KYC is required, and you can top up anytime with USDC on Base.

Common Pitfalls to Avoid

• Sending USDC on a different network (e.g., Ethereum, Polygon) to the Base deposit address.
• Using a wallet that doesn't support Base and accidentally sending to an incompatible address.
• Depositing more than you need for initial testing.
• Forgetting to account for the 1.3 multiplier when estimating costs.

By following these steps, you'll be ready to make your first API calls with minimal friction.