Funding & Withdrawing
Fund your wallet to pay for service calls. Withdraw your earnings at any time. Everything is managed from the Finance tab.
The Finance tab
Click Finance in the sidebar to open the financial management page. This tab contains all deposit, withdrawal, swap, and threshold controls.
Balance card
At the top of the Finance tab, a balance card shows your current holdings:
- USDC balance — your available USDC for API payments or earnings
- ETH balance — your gas balance for transaction fees
- Contract deposit — how much USDC is deposited in the payment system
Buy USDC with a credit or debit card
The fastest way to fund a new control center. Sertone has a built-in card purchase option: click one button, buy USDC inside a secure popup, and the funds arrive in your wallet automatically — no exchange account, no copy-pasting addresses, no minimum order.
How to use it
- Open the Finance tab in your control center
- Scroll to Fund Your Control Center and click Buy USDC with Credit Card
- A secure Coinbase purchase window opens in a small popup
- Select your payment method — Visa, Mastercard, Apple Pay, Google Pay, or bank transfer
- Enter the amount you want to buy
- Complete the payment flow
- USDC arrives in your wallet automatically — your wallet address is pre-filled, nothing to copy
Your card details stay with Coinbase. The purchase window is a Coinbase-hosted page. Sertone never sees your payment information. USDC is sent directly to your control center wallet on the Base network.
What to expect
| Detail | Info |
|---|---|
| Transfer time | Usually 2–5 minutes after payment completes |
| Network | Base (USDC lands in your control center wallet automatically) |
| Fees | Coinbase charges a small service fee — typically 1–3% depending on payment method and region |
| Minimum | Typically $5. No maximum set by Sertone. |
| Account required? | No Coinbase account needed for small purchases. Larger amounts may require identity verification. |
| Availability | Most countries where Coinbase operates — US, EU, UK, Canada, Australia, and more |
Depositing from an exchange or wallet
The "Fund Your Control Center" section shows:
- Your deposit address — a Base network address displayed as text and as a QR code
- A Copy button to copy the address to your clipboard
Send USDC or ETH to this address from any wallet or exchange you trust (Tangem, Ledger, MetaMask, Kraken, Coinbase, Binance, etc.). No wallet connection is needed — just send to the address on the Base network. The control center detects incoming transfers automatically.
Recommended starting balance: $5–10 USDC is enough for hundreds of service calls. A small amount of ETH (a few dollars) covers transaction fees for months. If the card option is unavailable in your region, use this standard deposit address from any exchange that supports Base.
Withdrawing funds
The "Withdraw Earnings" section lets you send tokens from your control center to any wallet address:
- Select the Token dropdown: USDC or ETH
- Enter the destination address (0x...)
- Enter the amount (for USDC; ETH sends the full balance minus gas reserve)
- Confirm with your admin password
- Click Send
USDC to ETH swap
If you need ETH for gas fees but only have USDC, the control center can swap for you. Two modes are available:
- Auto mode — set a threshold (e.g., "swap when ETH below 0.002") and an amount. The control center handles swaps automatically.
- Manual mode — toggle to manual, enter an amount, click "Get Quote" to see the exchange rate, then click "Swap Now" to execute.
Thresholds and auto-pause
Configure balance thresholds to trigger alerts and auto-pause:
- Low USDC Threshold — alerts and auto-pause trigger below this USDC balance
- Low Gas Threshold (ETH) — alerts trigger below this ETH balance
Enable auto-pause to automatically stop serving paid service calls when your balance drops below thresholds. Demo mode continues to work while paused. You can also manually Pause Now or Resume.
Transaction history
The History section at the bottom of the Finance tab shows a table of all financial activity:
| Column | Description |
|---|---|
| Time | When the transaction occurred |
| Action | Type of transaction (deposit, withdrawal, swap, payment, earning) |
| Token | USDC or ETH |
| Amount | How much was transferred |
| Detail | Additional context (e.g., destination address, API name) |
| TX | Transaction reference link |
Wallet management
An expandable "Wallet Management" section provides advanced options:
- View your wallet address and public key
- Export your wallet — download the raw key or a password-protected keystore file
- Import your own wallet — replace the auto-generated wallet with one you already own
Back up your wallet. Export a backup from Settings > Backup. If you lose access to your control center without a backup, your funds cannot be recovered.
Owner earnings
When a consumer calls your API, USDC is transferred to your wallet automatically. You can see your earnings on the Dashboard and withdraw at any time from this Finance tab.