Marshall MQKafka and RabbitMQ, from a guy who can't lie.

A native macOS client that reads your queues without disturbing them, and says "can't see" when it can't. Free, written in Swift.

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Release notes

The Marshall MQ icon, a smiling golden retriever on an orange rounded square.

Reads without disturbing

On Kafka a read is a seek. Marshall never joins a group, never commits an offset and never creates a topic by asking about one. Point it at production.

Reading messages

The shape objection

Which messages disagree with the rest, on which field, string where the others have a number, marked on the exact line. No AI, no network, just the data.

The shape objection

The chart nobody asked for

Where the messages really are. The partition holding most of the traffic, the empty one next to full neighbors, and which key is to blame.

The partition chart

Unknown is not zero

A group that never committed has unknown lag, not zero. Too few messages to judge says so. Every blind spot is listed under "Can't see".

Consumer groups

Honest about RabbitMQ

Looking at a RabbitMQ message means consuming it, and that marks it redelivered forever. Marshall tells you before it reads, not after.

RabbitMQ

Writes only when you insist

Produce a message or reset a group's offsets, each behind a sheet that asks why. The reason travels with the message.

Producing and resetting

The ground rules

Unknown is a real answer. I'm not rounding it down to zero.

— Marshall

Every screen in Marshall follows the same rule: if a number cannot be established, it is shown as can't see, never as zero. A feature that cannot express its own blind spot does not ship.

Managed by Orbit

Marshall MQKafka and RabbitMQ, from a guy who can't lie.

Reads without disturbing

The shape objection

The chart nobody asked for

Unknown is not zero

Honest about RabbitMQ

Writes only when you insist

The ground rules ​

The ground rules