EdgeCitadel Orchestrates Edge AI Agents with Hybrid NATS-MQTT

EdgeCitadel addresses the challenge of coordinating edge-resident AI agents—spanning home servers, IoT hubs, laptops, and phones—without relying on cloud-style transports or central relays. The platform is built around a single NATS 2.10 server equipped with a built-in MQTT adapter. This hybrid architecture merges MQTT connectivity for diverse IoT devices with JetStream-backed persistence, enabling reliable message replay for backend services. Agents communicate via a shared subject namespace, allowing direct peer-to-peer delegation. A passive aggregator monitors and stores traffic without sitting on the delivery path, ensuring observability without latency overhead. The migration from earlier MQTT relay prototypes to this hybrid design was a key highlight, demonstrated through a working cross-device testbed.

For practitioners, EdgeCitadel offers a practical blueprint for building decentralized multi-agent systems on edge hardware. The platform was successfully tested across ARM64, x64, and Android clients, proving its viability for heterogeneous environments. By eliminating the need for a central relay server, EdgeCitadel reduces latency, improves resilience, and cuts cloud dependency—critical for real-time edge AI applications like smart homes, autonomous drones, and distributed sensor networks. This work, presented at arXiv, signals a shift toward orchestration stacks that treat edge devices as first-class peers rather than mere endpoints.