A plain-English guide to paying for QSC peptide orders with cryptocurrency. QSC accepts Bitcoin (BTC) and USDT on Ethereum (ERC-20) only — processed automatically through the Blockonomics payment gateway. No credit cards, no PayPal, no bank transfers.
5 min read · Covers: Bitcoin, USDT ERC-20, ETH gas fees, Blockonomics, wallets, network safety
QSC accepts two cryptocurrencies. Before you buy, understand the key differences — especially the ETH gas fee requirement for USDT payments.
Bitcoin (BTC)
USDT (ERC-20)
Price stability
Volatile — BTC price changes constantly
Stable — always ≈ $1 USD per token
Network
Bitcoin blockchain
Ethereum only (ERC-20) at QSC
Extra requirement
None — BTC is self-contained
Must also hold ETH for gas fees ($2–15)
Confirmation time
10–60 minutes
1–5 minutes
Amount to send
BTC equivalent of USD total (e.g. 0.00412 BTC)
Same as USD total (e.g. $312 = 312 USDT)
Best for
Those already holding BTC
Those who want a predictable, stable payment amount
⛽ USDT ERC-20 requires ETH for gas fees
Sending any token on the Ethereum network — including USDT — requires ETH (Ether) in the same wallet to pay the network’s transaction fee, known as “gas.” USDT itself does not cover this fee.
What to do before paying with USDT:
• Hold 0.01–0.02 ETH (roughly $25–50 at current prices) in the same wallet you’re sending USDT from
• If your ETH balance is zero or near-zero, the transaction will fail with an “insufficient gas” error
• Buy ETH on the same exchange (Coinbase, Kraken, etc.) and transfer it alongside your USDT
Exception: If you send USDT directly from a Coinbase exchange account (not Coinbase Wallet), Coinbase handles gas automatically — you will see the fee upfront before confirming.
⚠️ Wrong network = lost funds permanently
USDT exists on multiple separate blockchains. QSC accepts USDT on Ethereum (ERC-20) only. The wallet address always starts with 0x…
These will lose your funds:
• USDT/TRC-20 (Tron) sent to QSC’s Ethereum address = 💸 gone
• USDT/SPL (Solana) sent to QSC’s Ethereum address = 💸 gone
Always verify: network = Ethereum, address starts with 0x.
2. Before You Start
📱 Get a crypto exchange account or wallet
Coinbase is the easiest for beginners — US-regulated, debit card accepted, handles ETH gas automatically when sending USDT. Kraken and Gemini are solid alternatives. For privacy, self-hosted wallets like MetaMask (Ethereum/USDT) or Exodus work well — but require you to manage ETH gas yourself.
⛽ For USDT: also buy ETH for gas
If paying with USDT from a self-hosted wallet (MetaMask, Exodus), you must hold ETH in the same wallet to pay Ethereum gas fees. Buy 0.01–0.02 ETH alongside your USDT. Without ETH, your USDT transaction will fail. Not needed if paying with BTC, or if sending USDT directly from Coinbase’s exchange.
📅 Plan 7+ days ahead for first-time buyers
First-time crypto purchases on regulated exchanges often trigger a 3–7 day security hold before funds can be withdrawn. Buy early — ideally a week before placing your QSC order. Bank transfers (ACH) are cheapest but slowest; debit cards are instant but cost more in fees.
💸 Fund in modest chunks
If new to crypto, try $100–200 test purchases before funding larger amounts. Some exchanges flag large first-time transfers for compliance review. Build a transaction history gradually.
🔐 Back up your wallet recovery phrase
If using a self-hosted wallet (MetaMask, Exodus), write down your 12 or 24-word recovery phrase on paper and store it offline. Lose it and your funds are gone permanently — there is no customer support reset.
🚫 Only pay via the Blockonomics checkout page
The only legitimate QSC wallet address is generated on the Blockonomics page after placing your order at qsc-usa.com. Never send crypto to an address received via email, Telegram, Reddit DM, or any other channel.
3. Step-by-Step: Paying with Bitcoin (BTC)
1 Buy Bitcoin on an exchange
Create an account on Coinbase, Kraken, or Gemini and complete identity verification (government ID required). Purchase Bitcoin via debit card (instant, higher fee ~1.5–3%) or bank transfer (3–5 day hold, lower fee).
How much to buy: The Blockonomics page shows the exact BTC amount at the live rate when you place your order. Because BTC is volatile, either wait until your order is placed to buy the precise amount, or buy slightly more as a buffer and hold the remainder.
2 Place your order at qsc-usa.com
Add items to your cart. Apply any coupon codes on the cart page before checkout (the field appears below your items — or click “Have a coupon? Click here” at the top of the checkout page). Fill in shipping details, select Bitcoin (BTC) as payment method, and click “Place order.”
3 The Blockonomics payment page loads
You are automatically redirected to a Blockonomics-hosted payment page showing:
• The exact BTC amount to send (e.g. 0.00412 BTC)
• A Bitcoin wallet address unique to your order
• A QR code to scan with your exchange app
• A countdown timer — the BTC rate is locked for a limited window
Keep this page open. It auto-updates as your transaction is detected on-chain.
4 Send the exact BTC amount
Open your exchange app. Go to Send / Withdraw Bitcoin. Paste the wallet address from Blockonomics or scan the QR code. Enter the exact BTC amount shown (not your USD total). Confirm and send.
⚠️ Triple-check before confirming:
• Wallet address matches Blockonomics exactly
• Amount is the BTC figure shown — not your USD total
• You are sending BTC, not another coin
5 Wait for blockchain confirmation
Bitcoin requires 1–3 network confirmations — typically 10–60 minutes depending on congestion. The Blockonomics page updates automatically: Waiting → Seen → Confirmed. Once confirmed, your WooCommerce order moves to Processing and QSC begins fulfillment within 1–3 business days.
4. Step-by-Step: Paying with USDT (ERC-20)
⚠️ Two things to confirm before starting:
1. You are sending USDT on Ethereum (ERC-20) only — not Tron (TRC-20) or Solana (SPL). The wallet address starts with 0x…
2. Your wallet also contains ETH for gas fees — see Step 1 below.
1 Get USDT (ERC-20) — and ETH for gas
Buy or convert to USDT on Coinbase, Kraken, or your exchange. USDT is a stablecoin — 1 USDT = $1 USD, so a $312 order requires 312 USDT.
⛽ ETH for gas — required if using a self-hosted wallet:
Sending USDT on the Ethereum network requires a separate ETH balance in the same wallet to pay the Ethereum gas fee. USDT cannot pay its own gas. You need approximately 0.01–0.02 ETH (~$25–50) available. Without it, the transaction will fail.
• Using MetaMask or Exodus? Buy ETH on your exchange, withdraw it to the same wallet address as your USDT, then send USDT.
• Using Coinbase exchange directly? Coinbase manages gas automatically — no separate ETH purchase needed. The fee is shown before you confirm.
2 Place your order at qsc-usa.com
Add items to cart, apply any coupon codes on the cart page. At checkout, select USDT (ERC-20) as your payment method, fill in shipping details, and click “Place order.”
3 The Blockonomics payment page loads
The Blockonomics page shows:
• The exact USDT amount (e.g. 312.00 USDT — matches your USD order total)
• An Ethereum wallet address in 0x… format
• A QR code
• A live payment status tracker
Keep this page open — it updates automatically as your transaction is detected.
4 Send USDT to the Ethereum address shown
In your exchange or wallet, go to Send / Withdraw USDT. Paste the 0x… wallet address from Blockonomics. Set the network to Ethereum (ERC-20). Your wallet will show the estimated gas fee — confirm you have enough ETH to cover it. Enter the exact USDT amount shown. Confirm and send.
⚠️ Triple-check before confirming:
• Address starts with 0x… and matches Blockonomics exactly
• Network is set to Ethereum — not Tron, not Solana
• Your ETH balance covers the estimated gas fee
• Amount is the USDT figure shown
5 Wait for Ethereum confirmation
USDT on Ethereum confirms in 1–5 minutes under normal conditions. Blockonomics detects the transaction and updates your order status automatically. Your WooCommerce order moves to Processing and QSC begins fulfillment within 1–3 business days.
5. How Blockonomics Works
What is Blockonomics?
Blockonomics is a non-custodial crypto payment processor integrated into QSC’s WooCommerce store. It generates a unique wallet address per order, monitors the blockchain, and automatically updates your order status on confirmation. Payment goes directly to QSC — Blockonomics never holds funds. No manual confirmation from you or QSC is required.
What does the Blockonomics payment page show?
After clicking “Place order” in WooCommerce you land on a Blockonomics-hosted page with: crypto amount owed, unique wallet address, QR code, and a live status tracker. Status progresses automatically: Waiting → Seen → Confirmed. No refresh needed — keep the page open.
I closed the Blockonomics page before paying — what now?
Your WooCommerce order still exists. Log in → My Account → Orders → find the Pending Payment order → click it for the payment link. If the window expired, email [email protected] with your order number.
Order still shows “Pending Payment” after paying — what to do
Check the transaction on a blockchain explorer first:
• BTC:mempool.space — search wallet address or transaction ID
• USDT/ETH:etherscan.io — search the 0x… address or transaction hash
If confirmed on-chain but order still pending after 2 hours, email [email protected] with order number + transaction hash.
6. Tips & Final Warnings
✅ Triple-check before sending
Crypto is irreversible. Before Send: (1) address matches Blockonomics, (2) network is Ethereum for USDT, (3) ETH balance covers gas, (4) amount is exact. There is no undo.
⛽ Top up ETH before USDT payments
If sending USDT from MetaMask or Exodus, check your ETH balance first. A failed USDT transaction due to insufficient gas still consumes a small gas fee. Keep 0.01–0.02 ETH on hand at all times.
📸 Save your transaction ID
Copy your txid/hash from your exchange after sending. Screenshot the Blockonomics confirmation. This is your proof of payment if any issue arises with your order.
⏳ Don’t panic during confirmation
BTC can take up to 60 minutes. USDT/ETH is usually 1–5 minutes. “Waiting” on Blockonomics means the transaction is in the queue — not lost. Keep the page open.
💱 BTC: act fast on the rate lock
The BTC rate on Blockonomics is locked for a limited window. Have your exchange app ready before placing the order so you can send promptly before the timer expires.
🚫 Never pay via DM or email address
The only legitimate QSC wallet address is on the Blockonomics checkout page at qsc-usa.com. Any address sent via email, Telegram, Reddit, or DM is a scam.
7. FAQ
Does QSC accept credit cards or PayPal?
No. QSC accepts Bitcoin (BTC) and USDT (ERC-20) only, processed via Blockonomics. No credit cards, debit cards, bank transfers, or PayPal.
Do I need ETH to pay QSC with USDT?
Yes — if sending from a self-hosted wallet like MetaMask or Exodus. You need ETH in the same wallet to pay the Ethereum network gas fee (typically $2–15). USDT cannot pay its own gas on the Ethereum network. If you send USDT directly from a Coinbase exchange account, Coinbase handles gas automatically and shows the fee before you confirm.
Can I send USDT from Coinbase directly to QSC?
Yes. When sending USDT from Coinbase, select Ethereum (ERC-20) as the network — not Tron or Solana. Coinbase handles gas automatically. Do not use Coinbase Wallet (the separate app) unless you have ETH in it for gas.
My USDT transaction failed — why?
The most common cause is insufficient ETH for gas. Check your ETH balance in the wallet you sent from. Add 0.01–0.02 ETH to the wallet and try again. Note: a failed transaction may still consume a small gas fee.
What if I sent USDT on the wrong network (Tron or Solana)?
Unfortunately these funds cannot be recovered. QSC’s Ethereum address does not exist on the Tron or Solana networks — the tokens are sent to an address that does not exist on those chains and are permanently lost. This is why confirming the network before sending is critical.
How do I know QSC received my payment?
Once confirmed on-chain, Blockonomics automatically updates your WooCommerce order from Pending Payment to Processing. You also receive an order status email. No need to contact QSC — fully automated.
Order still Pending Payment after confirmed on-chain — what to do?
Verify on mempool.space (BTC) or etherscan.io (USDT/ETH) that the transaction shows as confirmed. If it does, email [email protected] with your order number and transaction hash.
Research Use Only: All products sold on qsc-usa.com are intended strictly for laboratory research purposes only. They are not approved for human consumption, veterinary use, or any other application. Researchers are responsible for understanding and complying with local regulations in their jurisdiction.
