On 9/15, eBay Will Add TLS1.2 Support To Our Production API Endpoints
eBay will add TLS1.2 support to our Production API endpoints on 9/15
eBay will also continue to support TLS 1.0 and 1.1 until at least June 2017. However, if your application is on an older stack, it might not be compatible with the order of the certificates.
Starting on Thursday, August 25, these Sandbox API endpoints already support TLS 1.2:
We strongly recommend that you use the Sandbox endpoints to test your application’s compatibility and verify that your system supports TLS 1.2 and SHA2 cert before 9/15
This change is part of an industry-wide initiative to improve security standards across the Web.
See this KB article for details.