EMI - v2 Payment API

EMI as a payment option gives your customers the freedom and affordability to purchase expensive items without having to deal with banks or NBFCs as intermediaries.

You can collect payments from customers in EMI using the Merchant Hosted integration. You need to ensure that EMI for the paymentMethod.name field and EMI code based on the card issuer and tenure for the paymentMethod.bankcode parameter is posted.

For the list of supported EMI codes, refer to EMI Codes.

Environment

Request header

ParameterDescription
dateThe current date and time. For example, format of the date is Wed, 28 Jun 2023 11:25:19 GMT.
authorizationThe 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

FieldDescription
usernameRepresents the username or identifier for the client or merchant, for example smsplus.
algorithmUse SHA512 algorithm for hashing and send this as header value.
headersSpecifies which headers have been used in generating the hash, for example date.
signatureThe 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

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

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
FieldDescription
udf1User defined field.
udf2User defined field.
udf3User defined field.
udf4User defined field.
udf5User defined field.
udf6User defined field.
udf7User defined field.
udf8User defined field.
udf9User defined field.
udf10User defined field.

additionalInfo object fields description

Parameter Description Example
enforcePaymethod
optional
Use **EMI** for EMI.

txnFlow
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

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

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"
}

Response parameters

Parameter Description
txnId This parameter contains the transaction ID of the transaction.
paymentId This parameter contains the payment ID of the transaction.
message This parameter contains the status message of the transaction.
📘

Reference:

To check the transaction status, refer to Verify Payment API.