Apparatus, methods, and systems for provision of filtered unified logging interfaces or services, for example, employed within application servers. In one embodiment of the invention, a filtered unified logging application programming interface (API) provides unified configuration and/or viewing for both tracing and logging. Use of filters provides a finer granularity of log controller or log output, for example, when compared with only utilizing severity. A method of providing filtered unified logging includes receiving a message, the message having a predefined severity; dropping the message if the message severity does not reach a threshold severity; applying one or more filters to the message if the message severity reaches the threshold severity; and sending the message to a destination if the message is not filtered out.