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NuGet · #1254 most downloaded on NuGet
MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker) and supports v3.1.0, v3.1.1 and v5.0.0 of the MQTT protocol.
Last release 3 months ago
01 Jul 2026
Release timing varies
gaps range from 9 days to 1.1 years
Rarely documented
notes for 8 of the last 60 stable releases
6 versions withdrawn
withdrawn after publishing
127 years old
142 releases · first in 1900
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Client: Late acknowledgement packets (PUBACK, PUBCOMP, SUBACK, UNSUBACK) for canceled or timed-out requests no longer trigger a protocol violation and
Server: The event InterceptingClientEnqueue is now also called for retained messages (BREAKING CHANGE!)
InterceptingClientEnqueue is now also called for retained messages (BREAKING CHANGE!)Your coding agent can read these notes before it upgrades. Set up the MCP server →