As of September 1, 2020 we will require TLS 1.2 and a cipher suite from the MODERN profile listed here:
We will end support for older versions of TLS. You can test your compatibility with the following test endpoint for your sandbox account: https://test-api.sift.com/v205/events.
On September 1, 2020, support for this test endpoint will end and our https://api.sift.com endpoint will require TLS 1.2 and a Modern profile cipher.
Please reach out to firstname.lastname@example.org if you have any questions.