Invoices priced in dollars
Charge $49 and let the payer choose USDT, ETH, SOL or anything else you accept. The rate locks when they pick, and a rounding shortfall still counts as paid.
Six networks · stablecoins and native coins
Crypto payments,
without the plumbing.
Price an order in dollars, send your customer a link, and let them pay in the coin they hold. Wallnuts watches the chain, moves the money to your wallet, and tells your server the moment it lands.
Free to start. No card needed.
Accept payments onETHEthereumBSCBNB ChainMATICPolygonSOLSolanaTRXTronTONTON
Everything between “pay me” and “paid”
The parts every crypto checkout has to get right, done once and done carefully.
An address for every order
Mint a fresh address per order — one-off or permanent — tagged with your own order id, so every payment arrives already attributed.
Money lands in your wallet
Whatever a customer sends is forwarded to your account wallet automatically. Token payments get their network fee topped up for you.
Webhooks you can trust
Signed events for every deposit and invoice, retried with backoff. Every attempt is logged in the console and can be replayed with a click.
Keys with the right reach
Read-only API keys for dashboards, read-write keys for your backend. Sends from the console need your PIN.
Exact to the last digit
Amounts are decimal strings from end to end — never floating point — so a balance, a quote or a payout is never off by a rounding error.
Three steps, no blockchain expertise
- 1
Create a payment request
From the console, or with one API call. You get a hosted payment page and a link to share.
- 2
Your customer pays
In the coin they already hold, from any wallet or exchange, by scanning a QR code or copying an address.
- 3
You get paid — and told
Wallnuts confirms the payment on-chain, forwards it to your wallet and sends your server a signed webhook.
A small API that does the hard parts
One call creates an invoice with a hosted payment page. A signed webhook tells you when it's paid — verify it with your secret and fulfil the order. Retries are safe: transfers take an idempotency key, and every amount is an exact decimal string.
- REST, JSON, versioned under /v1
- HMAC-signed webhooks with a replayable delivery log
- Scoped API keys: read-only or read-write
curl https://api.wallnuts.dev/v1/invoices \
-H "Authorization: Bearer $WALLNUTS_KEY" \
-H "Content-Type: application/json" \
-d '{ "fiat_amount": "49.00",
"description": "Order #1042",
"external_id": "order-1042" }'{
"id": "0b9e6c52-4f1d-4a0e-9d7b-2c6f1e8a3b41",
"event": "invoice.paid",
"created": 1790467200,
"data": {
"externalId": "order-1042",
"status": "PAID",
"fiatAmount": "49",
"paidFiat": "49",
"currency": "TRX.USDT"
}
}Every feature on every plan
Invoices, webhooks and the full API come with the free plan. What you pay for is headroom — more volume, more addresses, longer logs.
Questions, answered
Who holds the keys?
Wallnuts does. Your account wallet is generated from a recovery phrase that is encrypted at rest, and Wallnuts signs the transfers that move payments into it. Money you hold there is sent onward from the console or the API, with your PIN.
Which coins can my customers pay with?
The native coin of Ethereum, BNB Chain, Polygon, Solana, Tron and TON, plus stablecoins: USDT on BNB Chain, Polygon, Solana and Tron, and USDC on Ethereum, BNB Chain and Solana. Over the API, an invoice can be limited to the ones you pick.
What if a customer pays late, or not quite enough?
Payment addresses keep being watched for a day after an invoice expires, so a late payment is still credited. An underpayment raises an invoice.underpaid webhook with exactly what is still owed.
Do I need to write code?
No. Create invoices in the console and share the payment link. The API and webhooks are there when you want to automate it.
Send your first payment link today
Create an account, set a PIN, and raise an invoice — the free plan covers everything you need to start.