flowdock/api-docs — pull request #48 by lautis (2014-12-10 10:14:28+00:00)
Title: ISO8601 created_at time

Document not-yet-merged `created_at` field for messages that uses ISO8601 like most other API endpoints. The old `sent` field is still present.

There doesn't seem to be any mechanism for indicating deprecated fields or any documentation about the individual fields of a message. If there was, `sent` would be marked as deprecated although it won't disappear any time soon.