The official announcement was posted here: https://support.ca.com/us/product-content/status/announcement-documents/2018/ca-api-gateway-8-x-eos-announcement.html
Highlights from the announcement:
We encourage you to plan for the migration to CA API Gateway 9.0 or later as soon as possible, so that you can take full advantage of the latest new features and enhancements that CA has to offer. For additional information on CA API Gateway, please visit the CA API Gateway support pages at https://support.ca.com/.
The End of Service of CA API Gateway 8.x applies to all editions of the CA API Gateway:
- SOA Gateway
- XML Firewall
- API Proxy
- XML Accelerator
This notice also applies to the following related products:
- Enterprise Service Manager (ESM) versions 1.11.x through 1.14.x
- OAuth Toolkit (OTK) versions 2.0 through 3.1.2.
- Gateway Migration Tool (GMU) versions 1.0.x and 1.1.x