Purpose and Significance

Casa is a Mac Catalyst application that bridges HomeKit and automation by exposing your local HomeKit data through a REST API and command-line interface. Designed for developers, automation engineers, and power users, Casa creates a fast, reliable localhost-only gateway into HomeKit without requiring remote cloud access or complex integrations. It fills a critical gap for those building home automation workflows, AI agents, and scripts that need programmatic HomeKit control on macOS.

Key Features

Local-only REST API — Binds exclusively to 127.0.0.1 (loopback), ensuring zero remote exposure and maximum privacy for home automation
HomeKit module opt-in — Requires explicit user permission; stays disabled by default until activated in settings
Embedded CLI — Swift-based command-line tool built directly into the app for scriptable automation and one-off queries
Comprehensive HomeKit access — Browse and control accessories, rooms, services, characteristics, and cameras through a single interface
Authentication support — Optional token-based auth via X-Casa-Token header for script-to-API communication
Minimal setup overhead — Works with existing Home app data; onboarding guides users through permissions and CLI installation
Automatic updates — Sparkle framework integration for seamless app versioning and distribution

Getting Started

For development: Clone the repository, open Casa.xcodeproj in Xcode, configure your Team ID, enable the HomeKit capability, and build. The app includes a comprehensive onboarding flow that walks you through permission grants and optional CLI installation.

For usage: The REST API defaults to http://127.0.0.1:14663. Query endpoints like GET /homekit/accessories, GET /homekit/rooms, or PUT /homekit/characteristics/:id to read and control HomeKit state. Use the CLI with commands like casa devices, casa rooms, or casa characteristics set for terminal-based automation.

API and CLI Overview

Casa exposes a RESTful interface covering the full HomeKit object model. Core endpoints include health checks, accessory queries, room and service browsing, characteristic read/write operations, and camera streaming. The embedded CLI mirrors these capabilities with human-friendly commands, supporting environment variable configuration for custom URLs and tokens—ideal for shell scripts, cron jobs, and automation frameworks.

Who It's For

Home automation developers building custom workflows or integrations with HomeKit
AI agents and LLMs needing structured, low-latency access to smart home state
Power users and sysadmins creating shell scripts, cron jobs, or command-line automation
Open-source contributors extending HomeKit tooling in the Swift ecosystem
Security-conscious teams requiring local-only smart home APIs without cloud intermediaries

Technical Stack

Casa is written in Swift with a macOS/Mac Catalyst foundation, leveraging native HomeKit entitlements and frameworks. The project includes Xcode project configuration, automated build scripts, GitHub Actions workflows, and Sparkle-based distribution infrastructure. SwiftLint enforces code quality standards across the codebase.

Common Use Cases

Scripting and automation: Query room status, control lights, or trigger scenes from shell scripts. Agent integration: Feed HomeKit state to LLM-powered agents for voice control or intelligent automation. REST bridge: Expose HomeKit to Python, Node.js, or other languages via HTTP. Monitoring: Poll characteristic changes and log or alert on state transitions.

Development and Contribution

The repository is actively maintained with clear build instructions, troubleshooting guidance, and environment variable documentation. Contributors can extend Casa by adding new API endpoints, CLI commands, or HomeKit feature support. The project uses standard Git workflows with pull requests and issue tracking.

Resources

GitHub Repository: Full source code, issue tracker, and security policy
AGENTS.md: Documentation and examples for AI agent integration
README: Quick start, API reference, CLI examples, and troubleshooting
Build Scripts: Automated restart-mac.sh for streamlined development builds

Source: OpenClaw project repository on GitHub. Last updated February 2026.

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