EMI Integration

You can collect payments from customers with leading wallets using the v2/payments API > Merchant Hosted integration. You need to ensure that EMI for the paymentMethod.name field and EMI bank code based on the desired wallet for the paymentMethod.bankcode field.

Steps to Integrate

Initiate the payment with PayU
Verify Payment

Step 1: Initiate the payment with PayU

Environment


Test Environment	https://apitest.payu.in/v2/payments
Production Environment	https://api.payu.in/v2/payments>

Request header

Request Headers

Parameter	Description
date	The current date and time. For example, format of the date is Wed, 28 Jun 2023 11:25:19 GMT.
authorization	The actual HMAC signature generated using the specified algorithm (sha512) and includes the hashed data. For more information, refer to authorization fields description.

authorization fields description

Field	Description
username	Represents the username or identifier for the client or merchant, for example smsplus.
algorithm	Use SHA512 algorithm for hashing and send this as header value.
headers	Specifies which headers have been used in generating the hash, for example date.
signature	The HMAC signature generated using the specified algorithm. For more information, refer to hashing algorithm.

hashing algorithm

You must hash the request parameters using the following hash logic:

Hash logic: sha512(<Body data> + '|' + date + '|' + merchant_secret)

Where <Body data> contains the request body posted with the request.

Sample header code

var merchant_key = 'smsplus';
var merchant_secret = 'izF09TlpX4ZOwmf9MvXijwYsBPUmxYHD';
// date
var date = new Date();
date = date.toUTCString();

// authorization
var authorization = getAuthHeader(date);

function getAuthHeader(date) {
    var AUTH_TYPE = 'sha512';
    var data = isEmpty(request['data']) ? "" : request['data'];
    var hash_string = data + '|' + date + '|' + merchant_secret;
    var hash = CryptoJS.SHA512(hash_string).toString(CryptoJS.enc.Hex);
    return `hmac username="${merchant_key}", algorithm="${AUTH_TYPE}", headers="date", signature="${hash}"`;
}

Request body

Parameter	Description	Example
accountId `mandatory`	`String` The merchant key provided by PayU during onboarding.	MERCHANT123
txnId `mandatory`	`String` Transaction ID for transaction tracking and this must be unique for every transaction.	REF123456
paymentMethod `mandatory`	`Object` Details about the payment method used. For EMI payments: • name: Must be "EMI" • bankCode: EMI code based on card issuer and tenure (refer to EMI Codes) • paymentCard: Card details object	{"name": "EMI", "bankCode": "EMI6"}
order `mandatory`	`Object` Details about the transaction order including product information, ordered items, user-defined fields, and payment charge specifications. For more information, refer to order object fields description.
additionalInfo `mandatory`	`Object` Additional information including transaction flow configuration and other EMI-specific options. For more information, refer to additionalInfo object fields description.
callBackActions `mandatory`	`Object` Actions to perform on the payment server in different scenarios. For more information, refer to callBackActions object fields description.
billingDetails `mandatory`	`Object` Billing details of the customer including name, address, phone number, email, etc. For more information, refer to billingDetails object fields description.

paymentMethod object fields description

Field	Description	Example
name `mandatory`	`String` This field must contain the payment mode code. For EMI payments, this must be "EMI". For more information, refer to Payment Mode Codes.	EMI
bankCode `mandatory`	`String` This field must contain the EMI code based on card issuer and tenure. For more information, refer to EMI Codes.	EMI6
paymentCard `mandatory for EMI`	`Object` This object contains the physical card or saved card token details. For more information, refer to paymentCard object fields description.

paymentCard object fields description

paymentCard object fields

Parameter	Description	Example
cardNumber `mandatory for physical card`	Card number.	5497774415170603
validThrough `mandatory for physical card`	Expiry date in MM/YYYY format.	05/2025
ownerName `optional`	Name of the card owner.	Ashish
cvv `mandatory for physical card`	CVV number of the card.	123
tavv `mandatory for saved card`	Cryptogram of the card for tokenized payments.	AAABAWFlmQAAAABjRWWZEEFgFz
last4Digits `mandatory for saved card`	Last four digits of the card.	0603
cardTokenType `mandatory for saved card`	Card token type. Valid values: PAYU, NETWORK, ISSUER.	PAYU
cardToken `mandatory for saved card`	Card token of the stored card.	b5f2d8785768087678fm9

order object fields description

order object fields

Parameter	Description	Example
productInfo `mandatory`	Product details.	Product details
orderedItem `optional`	Details about the items ordered.	Array of Objects
userDefinedFields `optional`	Custom fields for additional information. Fields: udf1, udf2, udf3, udf4, udf5, udf6, udf7, udf8, udf9, udf10. For more information, refer to	Object
paymentChargeSpecification `mandatory`	Includes amount and charges. For more information, refer to paymentChargeSpecification object fields description	Object

paymentChargeSpecification object fields description

Parameter	Description	Example
price `mandatory`	The transaction amount.	1000
netAmountDebit `optional`	Net amount to be debited.	1000
taxSpecification `optional`	Tax details of the product/order.	Object
convenienceFee `optional`	Fees format (e.g., CC:12).	CC:12
offers `optional`	Offers applied or available for the payment.	Object

userDefinedFields object fields description

Field	Description
udf1	User defined field.
udf2	User defined field.
udf3	User defined field.
udf4	User defined field.
udf5	User defined field.
udf6	User defined field.
udf7	User defined field.
udf8	User defined field.
udf9	User defined field.
udf10	User defined field.

additionalInfo object fields description

additionalInfo object fields

Parameter	Description	Example
enforcePaymethod `optional`	Use EMI for EMI.
txnS2sFlow `optional`	`String` Transaction server-to-server flow configuration for EMI payments.	4
createOrder `optional`	`String` Whether to create an order during the payment process.	false
createOrder `optional`	A flag to store the order details (true/false).	true

callBackActions object fields description

callBackActions object fields

Parameter	Description	Example
successAction `mandatory`	URL to be called on payment success.	https://example.com/success
failureAction `mandatory`	URL to be called on payment failure.	https://example.com/failure
cancelAction `mandatory`	URL to be called if user cancels the payment.	https://example.com/cancel
codAction `optional`	URL for Cash on Delivery (COD) action.	https://example.com/cod

billingDetails object fields description

billingDetails object fields

Parameter	Description	Example
firstName `mandatory`	First name of the billing contact.	Ashish
lastName `optional`	Last name of the billing contact.	Kumar
address1 `mandatory`	Primary billing address.	123 Main Street
address2 `optional`	Secondary billing address.	Apt 4B
phone `optional`	Phone number of the billing contact.	9123456789
email `mandatory`	Email address of the billing contact.	[email protected]
city `optional`	City of the billing address.	Bharatpur
state `optional`	State of the billing address.	Rajasthan
country `optional`	Country of the billing address.	India
zipCode `optional`	Postal/Zip code of the billing address.	321028

Sample request

curl --location 'https://apitest.payu.in/v2/payments' \
--header 'date: Thu, 27 Mar 2025 10:12:27 GMT' \
--header 'authorization: hmac username="smsplus", algorithm="sha512", headers="date", signature="ec84843a663143bb89391f6fa2d4b9404bab1543a3eee81263b4a507ebf5d289d8fad1fbcdd59da820951e3e0f9b0b0b3d1bad9b41338804e7c42a8a6197c6e9"' \
--header 'Content-Type: application/json' \
--data-raw '{
    "accountId": "smsplus",
    "referenceId": "b5f2d8785768087678fn4",
    "amount": 10000,
    "currency": "INR",
    "paymentSource": "WEB",
    "paymentMethod": {
        "name": "EMI",
        "bankCode": "EMI6",
        "paymentCard": {
            "cardNumber": "5004461234560000",
            "validThrough": "04/2025",
            "ownerName": "John Doe",
            "cvv": "123"
        }
    },
    "order": {
        "productInfo": "EMI Payment for Electronics",
        "userDefinedFields": {
            "udf1": "",
            "udf2": "",
            "udf3": "",
            "udf4": "",
            "udf5": "",
            "udf6": "",
            "udf7": "",
            "udf8": "",
            "udf9": "",
            "udf10": ""
        },
        "paymentChargeSpecification": {
            "price": "10000.00"
        }
    },
    "additionalInfo": {
        "txnS2sFlow": "4",
        "createOrder": "false"
    },
    "callBackActions": {
        "successAction": "https://yoursite.com/success",
        "failureAction": "https://yoursite.com/failure",
        "cancelAction": "https://yoursite.com/cancel"
    },
    "billingDetails": {
        "firstName": "John",
        "lastName": "Doe",
        "phone": "9876543210",
        "email": "[email protected]",
        "city": "Mumbai",
        "state": "Maharashtra",
        "country": "India",
        "zipCode": "400001"
    }
}'

Sample response

{
    "referenceId": "b5f2d8785768087678fn4",
    "paymentId": "1999110000001769",
    "message": "Please call verify api to get the transaction status"
}

Step 2: Verify the payment

Verify the transaction details using the Verification APIs. For API reference, refer to Verify Payment API under API Reference.

📘
Tip
The transaction ID that you posted in Step 1 with PayU must be used here.