Onramping API

This document covers the Onramping endpoint used to create pay-links that redirect your customers to our on-ramp checkout where they can purchase crypto with fiat and have it sent directly to a deposit address. It includes:

Create a pay-link (POST /api/ramping/links)

This endpoint is protected, you must be authenticated.

Base URL

All examples use:

https://www.niftipay.com

If you’re running locally, replace with your own base URL.

Authentication

This endpoint supports two authentication methods (depending on your integration setup):

1) API Key (recommended for server-to-server integrations)

Send your API key in the x-api-key header.

curl -X POST "https://www.niftipay.com/api/ramping/links" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -d '{ ... }'

If you are authenticated via the dashboard.

For browser calls, you usually don’t need to add headers manually — the cookie is sent automatically.

How it works

You call POST /api/ramping/links with your customer’s details and the fiat amount.
The API creates an underlying crypto invoice order and generates a signed pay-link token.
You redirect your customer to the returned url.
The customer lands on the Niftipay on-ramp page, selects a payment method (card or bank transfer), completes KYC if needed, and pays.
The purchased crypto is sent directly to the invoice deposit address.
Once the on-chain deposit is detected, the invoice is marked as paid and your webhook fires.

Create a pay-link

POST /api/ramping/links

Request body

Field	Type	Required	Notes
`firstName`	string	Yes	Customer’s first name.
`lastName`	string	Yes	Customer’s last name.
`email`	string	Yes	Customer’s email. Used for verification and KYC.
`fiatAmount`	string or number	Yes	The fiat amount the merchant wants to receive (net). Must be a valid decimal.
`network`	string	No	Blockchain network: `BTC`, `LTC`, `ETH`, `SOL`, or `XRP`. Falls back to your saved defaults if omitted.
`asset`	string	No	Crypto asset: `BTC`, `LTC`, `ETH`, `SOL`, `XRP`, `USDT`, or `USDC`. USDT/USDC require `network` to be `ETH`. Falls back to your saved defaults if omitted.
`fiatCurrency`	string	No	Fiat currency code. Defaults to `EUR` if not provided and no saved default. See supported currencies below.
`reference`	string	No	Your own unique reference for this order. If provided, must be unique across your orders.
`merchantId`	string	No	Optional merchant identifier for multi-merchant setups.
`provider`	string	No	Optional provider preference. If omitted, the provider is chosen automatically based on customer geolocation.

If network and asset are not provided, the API will use your saved defaults from /api/ramping/settings-token. If no defaults are saved either, the request will fail with a 400 error.

Query parameters

Param	Type	Notes
`replaceCancelled`	`"1"`	If set, allows re-creating a link for a previously cancelled order with the same reference.

Success response (200)

{
  "url": "https://www.niftipay.com/ramping/pay/eyJhbG...",
  "token": "eyJhbG...",
  "order": {
    "id": "clxyz123...",
    "reference": "INV-001",
    "network": "ETH",
    "asset": "USDT",
    "amountCrypto": "105.26",
    "fiatCurrency": "EUR",
    "fiatAmount": "100.00",
    "depositAddress": "0xabc123...",
    "destinationTag": null,
    "paymentUri": "ethereum:0xabc123...?value=105260000",
    "qrUrl": "https://...",
    "status": "pending",
    "createdAt": "2026-03-26T10:00:00.000Z",
    "expiresAt": "2026-03-27T10:00:00.000Z",
    "merchantId": null
  },
  "link": {
    "orderId": "clxyz123...",
    "reference": "INV-001",
    "fiat": "EUR",
    "fiatAmount": "100.00",
    "crypto": "USDT",
    "blockchain": "ETH",
    "expiresAt": "2026-03-27T10:00:00.000Z",
    "invoiceExpiresAt": "2026-03-27T10:00:00.000Z",
    "invoiceStatus": "pending",
    "providerHint": null,
    "fiatAmountNet": null,
    "fiatAmountGross": null,
    "feePercent": null
  }
}

Response fields

`url`

The full public URL to redirect your customer to. This is the on-ramp checkout page.

`order`

Field	Type	Notes
`id`	string	Internal order ID.
`reference`	string	Your reference (or auto-generated).
`network`	string	Blockchain network.
`asset`	string	Crypto asset.
`amountCrypto`	string	The crypto amount the customer needs to send.
`fiatCurrency`	string	Fiat currency code.
`fiatAmount`	string	Net fiat amount.
`depositAddress`	string	The on-chain address the customer will send to.
`destinationTag`	string or null	XRP destination tag (only for XRP).
`paymentUri`	string	Payment URI for wallet apps.
`qrUrl`	string	QR code image URL.
`status`	string	Order status (starts as `pending`).
`createdAt`	string	ISO 8601 creation timestamp.
`expiresAt`	string	ISO 8601 expiration timestamp.
`merchantId`	string or null	Your merchant ID if provided.

`link`

Field	Type	Notes
`orderId`	string	Same as `order.id`.
`reference`	string	Same as `order.reference`.
`fiat`	string	Fiat currency.
`fiatAmount`	string	Net fiat amount.
`crypto`	string	Crypto asset.
`blockchain`	string	Blockchain network.
`expiresAt`	string	When the pay-link token expires.
`invoiceExpiresAt`	string	When the underlying invoice expires.
`invoiceStatus`	string	Current invoice status.
`providerHint`	string or null	Provider hint if specified.
`fiatAmountNet`	string or null	Net fiat amount (provider prefill).
`fiatAmountGross`	string or null	Gross fiat amount including fees (provider prefill).
`feePercent`	number or null	Fee percentage applied (provider prefill).

Supported fiat currencies

The following fiat currencies are supported for on-ramping:

Code	Currency
`USD`	US Dollar
`EUR`	Euro
`GBP`	British Pound
`AUD`	Australian Dollar
`AED`	UAE Dirham
`BRL`	Brazilian Real
`CAD`	Canadian Dollar
`CHF`	Swiss Franc
`CZK`	Czech Koruna
`DKK`	Danish Krone
`HKD`	Hong Kong Dollar
`IDR`	Indonesian Rupiah
`INR`	Indian Rupee
`JPY`	Japanese Yen
`MXN`	Mexican Peso
`NOK`	Norwegian Krone
`NZD`	New Zealand Dollar
`PHP`	Philippine Peso
`PLN`	Polish Zloty
`QAR`	Qatari Riyal
`RON`	Romanian Leu
`SAR`	Saudi Riyal
`SEK`	Swedish Krona
`SGD`	Singapore Dollar
`THB`	Thai Baht
`TRY`	Turkish Lira
`TWD`	New Taiwan Dollar
`VND`	Vietnamese Dong
`ZAR`	South African Rand

Availability of specific currencies may vary depending on the customer’s country and the on-ramp provider selected.

Bank approval rates

On-ramping is limited by the customer’s card-issuing bank. Each bank has a historic approval rate that determines how likely a card transaction is to succeed. See the full Bank Approval Rates reference for all supported banks and their approval percentages by region.

Error responses

Status	Condition	Example
400	Missing required fields	`{ "error": "firstName, lastName, email are required" }`
400	Invalid fiat amount	`{ "error": "fiatAmount is required and must be a number (string or number)" }`
400	Missing network/asset with no defaults	`{ "error": "network and asset are required. Either provide them in the request or set defaults via /api/ramping/settings-token." }`
400	Unsupported network	`{ "error": "Unsupported network: ABC" }`
400	Asset/network mismatch	`{ "error": "USDC/USDT require ETH" }`
403	Crypto not enabled for ramping	`{ "error": "Crypto not enabled for ramping" }`
409	Duplicate reference	`{ "error": "Reference already exists" }`
409	No available deposit addresses	`{ "error": "No available addresses" }`

Examples

Example 1 — Basic pay-link (EUR, ETH network)

curl -X POST "https://www.niftipay.com/api/ramping/links" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "firstName": "John",
    "lastName": "Doe",
    "email": "john@example.com",
    "fiatAmount": "100",
    "network": "ETH",
    "asset": "USDT",
    "fiatCurrency": "EUR"
  }'

Example 2 — With reference and merchant ID

curl -X POST "https://www.niftipay.com/api/ramping/links" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "firstName": "Jane",
    "lastName": "Smith",
    "email": "jane@example.com",
    "fiatAmount": "250.50",
    "network": "BTC",
    "asset": "BTC",
    "fiatCurrency": "USD",
    "reference": "ORDER-2026-001",
    "merchantId": "shop-london-01"
  }'

Example 3 — Using saved defaults (no network/asset/fiat)

If you have already configured defaults via the dashboard or /api/ramping/settings-token:

curl -X POST "https://www.niftipay.com/api/ramping/links" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "firstName": "Alex",
    "lastName": "Johnson",
    "email": "alex@example.com",
    "fiatAmount": "50"
  }'

Example 4 — Replace a cancelled order

If a previous order with the same reference was cancelled and you want to create a new one:

curl -X POST "https://www.niftipay.com/api/ramping/links?replaceCancelled=1" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "firstName": "John",
    "lastName": "Doe",
    "email": "john@example.com",
    "fiatAmount": "100",
    "network": "SOL",
    "asset": "SOL",
    "reference": "ORDER-2026-001"
  }'

Customer flow after redirect

Once your customer opens the url returned by this endpoint:

They see the on-ramp checkout page with the invoice details pre-filled.
They enter their email (used for verification code and KYC).
They select a payment method: Debit/Credit Card or Bank Transfer.
They are redirected to complete KYC and payment.
The crypto is purchased and sent to the invoice deposit address.
Once the on-chain deposit is confirmed, the invoice status changes to paid.

The on-ramp provider is automatically selected based on the customer’s geolocation. You can override this with the provider field in the API request.

Node.js Example

A complete Node.js example showing how to create an onramping pay-link, including all optional fields and response parsing.

const result = await apiRequest("POST", "/api/ramping/links", {
  // Customer details — used for checkout flow and KYC
  firstName: "John",
  lastName: "Smith",
  email: "john.smith@example.com",

  // Net fiat amount you (the merchant) want to receive
  fiatAmount: 100,

  // Blockchain network (optional — falls back to dashboard defaults)
  network: "ETH",

  // Crypto asset (optional — falls back to dashboard defaults)
  asset: "USDT",

  // Fiat currency (defaults to "EUR")
  fiatCurrency: "EUR",

  // Your unique reference (optional)
  reference: "RAMP-ORDER-001",
});

// Key response fields:
// result.url                  — redirect customer here (checkout page)
// result.token                — signed token in the URL
// result.order.id             — underlying crypto invoice ID
// result.order.depositAddress — on-chain deposit address
// result.order.amountCrypto   — crypto amount
// result.order.status         — "pending" initially
// result.link.fiatAmountNet   — net fiat amount
// result.link.fiatAmountGross — gross fiat amount (with fees)
// result.link.feePercent      — fee percentage

See the full working script with setup and helper function: API Examples (Node.js)

Webhooks

When the underlying invoice order changes status (e.g. from pending to paid), your configured webhook will fire with the order details. See the Webhooks documentation for setup and payload details.

Getting Started

API

​Onramping API

​Base URL

​Authentication

​1) API Key (recommended for server-to-server integrations)

​2) Session cookie (browser / dashboard usage)

​How it works

​Create a pay-link

​Request body

​Query parameters

​Success response (200)

​Response fields

​url

​order

​link

​Supported fiat currencies

​Bank approval rates

​Error responses

​Examples

​Example 1 — Basic pay-link (EUR, ETH network)

​Example 2 — With reference and merchant ID

​Example 3 — Using saved defaults (no network/asset/fiat)

​Example 4 — Replace a cancelled order

​Customer flow after redirect

​Node.js Example

​Webhooks