Skip to main content
Fund a card from your USD card wallet. Debited fund-first; the card’s mirrored balance updates on success.
Card endpoints use the same base URL and API key as the rest of the API and are not signature-gated.

​
Endpoint

POST /api/v1/business/card/{reference}/topup
Signature required: No

​
Headers

HeaderRequiredDescription
X-Numero-Api-KeyYesYour API key

​
Path parameters

ParameterTypeRequiredDescription
referencestringYesThe card reference

​
Request body

FieldTypeRequiredDescription
amountnumberYesUSD amount

​
Request example

curl -X POST "https://api-dev.usenumero.com/numeroaccount/api/v1/business/card/NCRD24AD18BEBD474A/topup" \
  -H "X-Numero-Api-Key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{ "amount": 10 }'

​
Response

{
  "status": true,
  "message": "Successful",
  "code": "200",
  "version": "v1",
  "reference": "N20260616120000",
  "data": {
    "cardReference": "NCRD24AD18BEBD474A",
    "customerId": "NCUS9953596C2B7F45",
    "label": "Ads spend",
    "brand": "Visa",
    "firstSix": "428852",
    "lastFour": "6353",
    "expiryMonth": "06",
    "expiryYear": "2029",
    "currency": "USD",
    "balance": 25.00,
    "status": "Active",
    "isPhysical": false,
    "dailyLimit": 5000,
    "perTransactionLimit": 1000,
    "issuedAt": "2026-06-16T12:00:00Z",
    "capabilities": ["USD", "APPLE_PAY", "GOOGLE_PAY"]
  },
  "error": null
}