Current api2.messente.com HTTPS certificate will be updated on 24th March 2016.
The certificate for api2.messente.com will expire soon and it will be updated on 24. March @ 21:00 UTC (23:00 EET).
Affected server: api2.messente.com
Date of update: 24. March 2016 @ 21:00 UTC (23:00 EET)
If you are using https://api2.messente.com/ for making HTTP API queries (not just http://), you will need to make sure you do not cache the https certificate.
There are known issues with some implementations written in Java, where the certificate is cached in the keystore and needs to be manually updated. Check this forum thread on how to clear the Java certificate cache.
If you are using some other library like cURL (PHP, C++) or httplib (Python), you should be already fine. Just make sure to double-check everything on the next day!