HTTPS at NCBI: Guidance for NCBI web API users

As originally announced on June 10, NCBI will be moving all web services to the HTTPS protocol on September 30, 2016. Particularly for API users, this move may disrupt any processes that access NCBI APIs using the HTTP protocol. Please see this document on the Develop action page for a complete discussion of this move and what you need to do, along with some new test servers to help you confirm whether your code will function after the change to HTTPS.
Source: NCBI Announcements - Category: Databases & Libraries Source Type: news