MQTT Plus

The ultimate high-performance macOS client for your message queues.

Overview

MQTT Plus is a native macOS application designed for developers who need a fast, reliable, and beautiful tool to interact with their messaging infrastructure. Built with SwiftUI and powered by direct C FFI bindings, it offers zero-latency performance for high-throughput environments.

Key Features

🚀 High Performance Engine

Unlike Electron-based wrappers, MQTT Plus is a native Swift application. It utilizes direct FFI bindings to the official C client libraries (e.g., cnats), ensuring that even the most demanding message streams are handled with ease.

🔌 Multi-Protocol Support

Unified interface for all your messaging needs:

• NATS Core: Real-time pub/sub with wildcard support.
• NATS JetStream: Advanced stream management, consumer inspection, and message replay.
• Redis Pub/Sub: Seamless integration with your Redis channels (Glob pattern matching supported).

🛠 Powerful JetStream Tools

Manage your NATS JetStream infrastructure directly from the UI.

• Stream Management: Create, edit, and delete streams.
• Consumer Insights: View consumer lag, active status, and configuration.
• Message Inspection: Browse persistent messages with full header and payload details.

🎨 Native macOS Experience

• Dark Mode: Optimized for late-night coding sessions.
• Fast Filtering: Real-time subject/channel filtering.
• JSON Highlighting: Built-in syntax highlighting for message payloads.

🗂 Multi-Tab Workspace

• Simultaneous Connections: Connect to multiple servers (NATS, Redis, etc.) at once.
• Isolated Sessions: Each tab maintains its own independent state, message log, and subscriptions.
• Smart Management: Easily switch between environments without disconnecting.

Getting Started

Prerequisites

• macOS 14.0+
• Xcode 15.0+ (for building from source)

Building

No external dependencies required! All C libraries are vendored and statically linked.

1. Clone the repository.
2. Open MQTT Plus.xcodeproj in Xcode.
3. Build and Run (Cmd+R).

Architecture

• UI: SwiftUI (Custom Tab Manager & Session Architecture)
• State Management: Per-tab Session models managed by TabManager
• Networking: Swift Concurrency (Async/Await)
• NATS: cnats (C library) via FFI
• Redis: Swift-native implementation

License

MIT