Solved: PayPal error 10002:Security error Security header is not valid

If you are seeing paypal error 10002: Security error Security header is not valid
There can be three reason behind this

1. Make sure API Credential is typed properly in your code and getting called with proper variable

2. Paypal account is not setup properly till now (which is the rare case)
3. SSL Certicicate Configuration Issue

During my debugging case i found that i was hidding on sandbox URL with live data (API Credentials). I have checked and changed the URL of Curl from testing environment (sandbox URL) to live environment.

You can check your payment working status here

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Chandra Shekhar

GCP Architect
Chandra Shekhar Pandey is Google certified Cloud engineer, I am Magento2 Trained developer. Having huge experience in designing cloud solution. I have around 12 years of experience with world enterprise IT companies and fortune 500 clients. During my architecture design I am always caring about high availability, fast performance and resilient system. From the programmer background I have huge experience in LAMP stack as well. Throughout my carrier I have worked on Retail, E-Learning, Video... Read More about Chandra Shekhar

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