JAVA SDK Integration

Installation Guide



Java 1.7 or later.



Installing Paytm's payment gateway SDK with maven.

  1. Add the below maven dependency to your project's POM.
  2. Build and install locally by executing the below command.
    mvn install

Generate API Keys

MID A unique merchant identifier issued by Paytm for your account.
Merchant Key A 16-digit unique merchant identifier issued by Paytm for your account.

Note: Merchant Key is a secret key used for encryption which should never be shared with anyone. And, you must generate separate API Keys for test and production environment.


Steps to generate API keys

  1. Log into your Dashboard.
  2. Select the environment (Test/Production) for which you want to generate the API key.
  3. For Test mode, click the Generate Key to generate key under Test API details tab.
  4. For Production mode, activate your account here to generate Production API details.

SDK code



Merchant will initialize the mandatory parameters i.e. environment, mid, key and website, after which they can directly call the SDK methods to call APIs of payment gateway.

// For Staging 
String environment = LibraryConstants.STAGING_ENVIRONMENT;

// For Production 
// String environment = LibraryConstants.PRODUCTION_ENVIRONMENT;

// Find your mid, key, website in your Paytm Dashboard at 
String mid = "YOUR_MID_HERE";
String key = "YOUR_KEY_HERE";
String website = "YOUR_WEBSITE_NAME";
String client_id = "YOUR_CLIENT_ID_HERE";

String callbackUrl = "MERCANT_CALLBACK_URL";

MerchantProperties.initialize(environment, mid, key, client_id, website);
// If you want to add log file to your project, use below code
FileHandler fh = null;
fh = new FileHandler("/path/log/file.log"); 
fh.setFormatter(new SimpleFormatter()); 

Note: Make sure the log file (/path/log/file.log) has write permission.



Create Transaction Token

EChannelId channelId = EChannelId.WEB;
String orderId = "UNIQUE_ORDER_ID";
Money txnAmount = new Money(EnumCurrency.INR, "1.00");
UserInfo userInfo = new UserInfo();
PaymentDetail paymentDetails = new PaymentDetail.PaymentDetailBuilder
                (channelId, orderId, txnAmount, userInfo).build();
SDKResponse<InitiateTransactionResponse> response = Payment.createTxnToken(paymentDetails);

Note: Make sure the log file (/path/log/file.log) has write permission.



String orderId = "YOUR_ORDER_ID";
Time readTimeout = new Time(5, TimeUnit.MINUTES);
PaymentStatusDetail paymentStatusDetail = new PaymentStatusDetail.PaymentStatusDetailBuilder(orderId).setReadTimeout(readTimeout).build();
SDKResponse<NativePaymentStatusResponse> response = Payment.getPaymentStatus(paymentStatusDetail);




String orderId = "YOUR_ORDER_ID";
String refId = "REFERENCE_ID";
String txnId = "TRANSACTION_ID";
String txnType = "REFUND";
String refundAmount = "1";
Time readTimeout = new Time(5, TimeUnit.MINUTES);
RefundDetail refundDetail = new RefundDetail.RefundDetailBuilder(orderId, refId, txnId, txnType,refundAmount).setReadTimeout(readTimeout).build();
SDKResponse<AsyncRefundResponse>response = Refund.initiateRefund(refundDetail);



String orderId = "YOUR_ORDER_ID";
String refId = "REFERENCE_ID";
Time readTimeout = new Time(5, TimeUnit.MINUTES);
RefundStatusDetail refundStatusDetail = new RefundStatusDetail.RefundStatusDetailBuilder(orderId, refId)
SDKResponse<NativeRefundStatusResponse> response = Refund.getRefundStatus(refundStatusDetail);


SDK Method References

Class Methods HTTP request Description


createTxnToken POST/theia/api/v1/initiateTransaction Returns a token which will be used in further frontend payment calls
getPaymentStatus POST/merchant-status/api/v1/getPaymentStatus Returns the payment status


initiateRefund POST/refund/api/v1/async/refund Initiates the refund
getRefundStatus POST/refund/api/v1/refundStatus Returns the refund status