'Security header is not valid' using PayPal sandbox in .NET
I am using the PayPal sandbox in ASP.Net C# 4.0. I added the following web references:
https://www.sandbox.paypal.com/wsdl/PayPalSvc.wsdl
https://www.paypalobjects.com/wsdl/PayPalSvc.wsdl
When I run this code:
PayPalAPIHelper.PayPalSandboxWS.SetExpressCheckoutReq req = new PayPalAPIHelper.PayPalSandboxWS.SetExpressCheckoutReq()
{
SetExpressCheckoutRequest = new PayPalAPIHelper.PayPalSandboxWS.SetExpressCheckoutRequestType()
{
Version = Version,
SetExpressCheckoutRequestDetails = reqDetails
}
};
// query PayPal and get token
PayPalAPIHelper.PayPalSandboxWS.SetExpressCheckoutResponseType resp = BuildPayPalSandboxWebservice().SetExpressCheckout(req);
In my resp object, the error message says:
Security header is not valid
I was told to give it correct API credentials. I signed up on developer.paypal.com and i'm assuming the email address and password i used are my valid credentials. How and where do I give it my API credentials? Thanks
Did you check the endpoint addresses in your web.config file
Those should be referenced to following url's
For API Certificate => SOAP https://api.sandbox.paypal.com/2.0/
For API Signature => SOAP https://api-3t.sandbox.paypal.com/2.0/
If you are using Signature then use the following code
CustomSecurityHeaderType type = new CustomSecurityHeaderType();
type.Credentials = new UserIdPasswordType()
{
Username = ConfigurationManager.AppSettings["PayPalUserName"], //Not paypal login username
Password = ConfigurationManager.AppSettings["PayPalPassword"], //not login password
Signature = ConfigurationManager.AppSettings["PayPalSignature"]
};
To get Paypal signature follow the link
For more info click here
Update:
Please check the following code it is working for me
CustomSecurityHeaderType type = new CustomSecurityHeaderType();
type.Credentials = new UserIdPasswordType()
{
Username = ConfigurationManager.AppSettings["PayPalUserName"],
Password = ConfigurationManager.AppSettings["PayPalPassword"],
Signature = ConfigurationManager.AppSettings["PayPalSignature"]
};
PaymentDetailsItemType[] pdItem = new PaymentDetailsItemType[1];
pdItem[0] = new PaymentDetailsItemType()
{
Amount = new BasicAmountType(){currencyID = CurrencyCodeType.USD,Value = ItemPrice},
Name = ItemName,
Number = ItemNumber,
Description = ItemDescription,
ItemURL = ItemUrl
};
SetExpressCheckoutRequestDetailsType sdt = new SetExpressCheckoutRequestDetailsType();
sdt.NoShipping = "1";
PaymentDetailsType pdt = new PaymentDetailsType()
{
OrderDescription = OrderDesc,
PaymentDetailsItem = pdItem,
OrderTotal = new BasicAmountType()
{
currencyID = CurrencyCodeType.USD,
Value = ItemPrice
}
};
sdt.PaymentDetails = new PaymentDetailsType[] { pdt };
sdt.CancelURL = "http://localhost:62744/PaymentGateway/PaymentFailure.aspx";
sdt.ReturnURL = "http://localhost:62744/PaymentGateway/ExpressCheckoutSuccess.aspx";
SetExpressCheckoutReq req = new SetExpressCheckoutReq()
{
SetExpressCheckoutRequest = new SetExpressCheckoutRequestType()
{
SetExpressCheckoutRequestDetails = sdt,
Version = "92.0"
}
};
var paypalAAInt = new PayPalAPIAAInterfaceClient();
var resp = paypalAAInt.SetExpressCheckout(ref type, req);
if (resp.Errors != null && resp.Errors.Length > 0)
{
// errors occured
throw new Exception("Exception(s) occured when calling PayPal. First exception: " +
resp.Errors[0].LongMessage);
}
Response.Redirect(string.Format("{0}?cmd=_express-checkout&token={1}",
ConfigurationManager.AppSettings["PayPalOriginalUrl"], resp.Token));