I am successfully tested the Hello world project with 2 way SSL validation. But I am getting error on CardValidation API. It shows "Access Denied, You don't have permission to access" in response.
I am testing with POSTMAN. If it is a certificate issue than hello world should not be successful !
We recommend you to use the VDC Playground tool for your testing. Can you please download this tool from your Dashboard > Project > Assets tab and test from there (refer to screenshot below)?
You can find the guide on Getting Started with VDC Playground from this blog post here - https://developer.visa.com/pages/visa-developer-center-playground
I've attached the License_Readme.txt that lists the requirements to use VDC Playground. Please take a look at that. Please conduct a sandbox test using the VDC Playground and share your test results with us.
Can you please share your test results with us? Is the issue resolved?