Getting "Security header is not valid" error, double checked the API credentials, still not working

[halldorr]

Sending a request using the following code:

$api_request = 'USER=' . urlencode('ouruser')
		.  '&PWD=' . urlencode('ourpass')
			.  '&SIGNATURE=' . urlencode('oursignature')
			.  '&VERSION=76.0'			
.  '&METHOD=ManageRecurringPaymentsProfileStatus'
			.  '&PROFILEID=' . urlencode($subId)
			.  '&ACTION=' . urlencode('Cancel')
			.  '&NOTE=' . urlencode( 'Profile cancelled by PSGADMIN' );

	$ch = curl_init();
	curl_setopt( $ch, CURLOPT_URL, 'https://api-3t.paypal.com/nvp' ); 
	curl_setopt( $ch, CURLOPT_VERBOSE, 1 );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
	curl_setopt( $ch, CURLOPT_POST, 1 );
	curl_setopt( $ch, CURLOPT_POSTFIELDS, $api_request );

	$response = curl_exec( $ch );

  Sending using PHP and the response I get back looks likje:

Array ( [TIMESTAMP] => 2018-02-08T15:05:39Z [CORRELATIONID] => 44f5a6f13e3b8 [ACK] => Failure [VERSION] => 76.0 [BUILD] => 39206242 [L_ERRORCODE0] => 10002 [L_SHORTMESSAGE0] => Security error [L_LONGMESSAGE0] => Security header is not valid [L_SEVERITYCODE0] => Error )

I have double and triple checked the credentials we're sending (above I have just said ouruser, ourpass etc) but what could be triggering this error?

[Ayim29]

Browse categories SKIP TO MAIN CONTENTSKIP TO SEARCHSummary Ayim29 Reply to Message Don't forget! Products and services may differ based on the user's country and PayPal account type. Please post the correct response for the user's situation. User halldorr: Canada Business Account Results from the PayPal Help Center Can't find the answer? Browse the PayPal Help Center To help others search for your topic, you can add tags. You can also choose where to post your topic under Location. Re: Getting "Security header is not valid" error, double checked the API credentials, stil Email me when someone replies to my post. Open discussion in popup Replying to: halldorr halldorr Contributor Contributor ‎Feb-13-2018 01:44 AM Getting "Security header is not valid" error, double checked the API credentials, still not working Sending a request using the following code: $api_request = 'USER=' . urlencode('ouruser') . '&PWD=' . urlencode('ourpass') . '&SIGNATURE=' . urlencode('oursignature') . '&VERSION=76.0' . '&METHOD=ManageRecurringPaymentsProfileStatus' . '&PROFILEID=' . urlencode($subId) . '&ACTION=' . urlencode('Cancel') . '&NOTE=' . urlencode( 'Profile cancelled by PSGADMIN' ); $ch = curl_init(); curl_setopt( $ch, CURLOPT_URL, 'https://api-3t.paypal.com/nvp' ); curl_setopt( $ch, CURLOPT_VERBOSE, 1 ); curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); curl_setopt( $ch, CURLOPT_POST, 1 ); curl_setopt( $ch, CURLOPT_POSTFIELDS, $api_request ); $response = curl_exec( $ch ); Sending using PHP and the response I get back looks likje: Array ( [TIMESTAMP] => 2018-02-08T15:05:39Z [CORRELATIONID] => 44f5a6f13e3b8 [ACK] => Failure [VERSION] => 76.0 [BUILD] => 39206242 [L_ERRORCODE0] => 10002 [L_SHORTMESSAGE0] => Security error [L_LONGMESSAGE0] => Security header is not valid [L_SEVERITYCODE0] => Error ) I have double and triple checked the credentials we're sending (above I have just said ouruser, ourpass etc) but what could be triggering this error? Solved! Go to Solution. 9 people had this problem. Top Powered by Khoros HELP & CONTACT SECURITY ©1999-2021 PayPal, Inc. All rights reserved. Privacy Legal Policy updates