Userless Payment API: The Simplest Way to Accept Crypto in Your App

The Problem with Traditional Crypto Payment APIs

Most crypto payment gateways require a multi-step integration:

This means more code, more database storage, more things that can break. For many use cases (one-time purchases, donations, simple checkouts), this complexity is unnecessary.

Introducing Userless Payment

Dynopay's Userless Payment feature eliminates all that complexity. You can create a payment with a single API call using just your API key:

curl -X POST https://api.dynopay.com/api/user/createPayment \
  -H "x-api-key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"amount": 50, "redirect_uri": "https://yoursite.com/thanks"}'

That's it. One call. No customer creation, no token management, no complexity.

How It Works Under the Hood

When you make an API call with only your x-api-key header (no Authorization/Bearer token), Dynopay:

The internal customer is reused across calls, so there's no performance overhead.

Two Flavors of Userless Payment

Hosted Checkout (createPayment)

Redirect customers to Dynopay's hosted checkout page:

const res = await axios.post('https://api.dynopay.com/api/user/createPayment', {
  amount: 25.00,
  redirect_uri: 'https://yoursite.com/success',
  webhook_url: 'https://yoursite.com/webhooks/payment'
}, {
  headers: { 'x-api-key': API_KEY }
});

// Redirect customer
window.location.href = res.data.data.redirect_url;

Direct QR Code (cryptoPayment)

Generate a QR code and wallet address for your own UI:

const res = await axios.post('https://api.dynopay.com/api/user/cryptoPayment', {
  amount: 25.00,
  currency: 'BTC',
  redirect_uri: 'https://yoursite.com/success'
}, {
  headers: { 'x-api-key': API_KEY }
});

// Display in your UI
const { qr_code, address, amount, currency } = res.data.data;

When to Use Userless vs Customer-Based

Backward Compatible

The best part? Userless payment is fully backward compatible. If you later decide you need per-customer tracking, just add the Authorization: Bearer header — the same endpoints work both ways.

Try It Now

Get your API key from the Dynopay dashboard and make your first userless payment in under 5 minutes.

Read the full API docs →