Paypal API – Security header is not valid (10002)
05Apr10
When integrating the PayPal API you might get the following error returned:
array(9) {
["TIMESTAMP"] => string(20) "2010-04-05T09:10:07Z"
["CORRELATIONID"] => string(12) "928a82db523e"
["ACK"] => string(7) "Failure"
["VERSION"] => string(2) "56"
["BUILD"] => string(7) "1236498"
["L_ERRORCODE0"] => string(5) "10002"
["L_SHORTMESSAGE0"] => string(14) "Security error"
["L_LONGMESSAGE0"] => string(28) "Security header is not valid"
["L_SEVERITYCODE0"] => string(5) "Error"
}
This might have two possible causes:
- you are using the wrong credentials (trying to connect to the Sandbox API URL using the Live credentials or vice versa)
- you are missing a & character in the NVP string, after the SIGNATURE, PWD or USER keys.
Filed under: Uncategorized | 67 Comments
Tags: api, error, paypal
Solutions for net headaches 
in my case, it’s because i called test mode link instead of live link.
Very helpful information. Thanks Jay
@jay: which one is the live link..?
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c n you please help me on sandbox user? i mean i am confused by different users, i thought the user remains the same but if we call on sandbox url this call is considered as test call otherwise its considered live call. you were correct, i used the live credentials on sandbox api
please help me creating sandbox user, tx
have you got any solution?
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Had the same problem, in my case i just misspelled the the sandbox variable though.
try copy/paste specially in case of API calls
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i am not getting! same error
any one plz help me
@ravik, no one on the internet has the time and patience to help you. that’s not how you succeed as a developer. Read the info, comprehend it and move along. If you can’t figure out, maybe you should try a different job
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In my case i was getting an error because of api signature . When i copied and pasted from paypal i was having a trailing space also but i removed it . That caused my error .
missing ‘&’. I love you mate
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