California-based EMQ, the company behind the EMQX platform for real-time data, device connectivity and system coordination across IoT and AI environments, has released EMQX Enterprise 6.2.

Built on MQTT, the platform adds foundational capabilities for agent discovery, coordination and governance across distributed systems.

With this release, EMQX extends beyond real-time data movement to support event-driven coordination between autonomous agents and connected devices, positioning the platform as a core infrastructure layer for both domains.

EMQX 6.0 established a unified, multi-tenant messaging foundation. EMQX 6.1 extended this with durable streaming and analytics-ready data pipelines. With EMQX 6.2, the platform adds capabilities for agent coordination, governance and operational control.

“EMQX 6.2 extends MQTT beyond data movement into native agent-to-agent discovery and coordination,” said Benniu Ji, vice president at EMQ Technologies. “By building A2A discovery directly into the broker, we are giving customers a simpler and more practical way to connect agents, devices and real-time systems on the same infrastructure.”

At the centre of this release is the introduction of the A2A Registry, a standards-aligned agent discovery system built directly into the MQTT broker. Agents register themselves by publishing structured cards describing their capabilities and metadata to MQTT topics. Other agents subscribe to these topics to discover available peers and receive real-time updates.

Unlike traditional service discovery systems that rely on polling centralised directories, EMQX enables event-driven discovery using retained messages, allowing agents to receive immediately the full set of available peers upon subscription, along with updates as agents join, update or disconnect.

The registry also provides built-in presence awareness. EMQX automatically annotates discovery messages with live online or offline status based on MQTT session state, allowing consumers to combine discovery and liveness in a single subscription stream.

The A2A Registry follows emerging agent-to-agent (A2A) protocol specifications and serves as a foundational capability for upcoming agent-based products, including EMQ’s Device Agent (www.emqx.com/en/agents/device-agent), currently in early access.

In addition, EMQX 6.2 introduces a standardised API specification that lets AI agents interact with and manage EMQX directly. This allows developers to bootstrap agents from minimal context and perform monitoring, configuration and operational tasks directly using tools such as Claude Code and Codex without requiring custom integrations, plugins or special skills.

In addition to agent coordination, EMQX 6.2 introduces several features designed to improve operational reliability, data consistency and resource control in large-scale deployments.

The unified namespace governance plugin enforces topic structure and payload schema validation at the broker level. Organisations can define a formal topic model with constraints and JSon schema validation, ensuring all published data conform to agreed standards before they reach downstream systems. This approach addresses a common problem in industrial and IoT environments, where topic structures often drift over time. By enforcing rules at the broker, EMQX enables a fail-fast approach that prevents invalid data from propagating through the system.

Version 6.2 also introduces subscription-level message filtering, allowing clients to receive only messages that meet specific criteria based on MQTT 5.0 user properties. This reduces unnecessary data transfer and client-side processing in high-throughput environments.

To improve device lifecycle management, EMQX 6.2 introduces the ability to update client keep-alive intervals dynamically at runtime. It also continues to support its core audiences across IoT, data engineering and enterprise infrastructure, while expanding to include teams building distributed AI systems.

To learn more about agent discovery and A2A over MQTT, explore EMQ’s webinar at  www.emqx.com/en/events/a2a-over-mqtt. For a deeper technical overview, read the release blog at www.emqx.com/en/blog/emqx-6-2-0-release-notes. Organisations interested in enterprise-grade features and commercial support can learn more or request a personalised demo at www.emqx.com. Developers can download the latest version of EMQX from the official GitHub repository at github.com/emqx/emqx.