curl -u [YOUR_KEY_ID]:[YOUR_KEY_SECRET] \
-X POST https://api.razorpay.com/v1/cards/fingerprints \
-H "content-type: application/json" \
-d '{
    "number": "4854980604708430"
}'

RazorpayClient razorpay = new RazorpayClient("[YOUR_KEY_ID]", "[YOUR_KEY_SECRET]");

JSONObject request = new JSONObject();
request.put("number","4854980604708430");

Card card = instance.card.requestCardReference(request);

$api = new Api($key_id, $secret);

$api->card->requestCardReference(array("number" =>"4854980604708430"));

import ( razorpay "github.com/razorpay/razorpay-go" )
client := razorpay.NewClient("YOUR_KEY_ID", "YOUR_SECRET")

data := map[string]interface{}{
  "number":"4854980604708430",
}
body, err := client.Card.RequestCardReference(data, nil)

var instance = new Razorpay({ key_id: 'YOUR_KEY_ID', key_secret: 'YOUR_SECRET' })

instance.cards.requestCardReference({"number":"4854980604708430"});

RazorpayClient client = new RazorpayClient("[YOUR_KEY_ID]", "[YOUR_KEY_SECRET]");

Dictionary<string, object> cardRequest = new Dictionary<string, object>();
cardRequest.Add("number", "4854980604708430");

Card card = client.Card.RequestCardReference(cardRequest);

{
  "network": "Visa",
  "payment_account_reference": "V0010013819231376539033235990",
  "network_reference_id": null
}

{
  "network": "RuPay",
  "payment_account_reference": null,
  "network_reference_id": "1001381923137653903323591234sdfds90"
}