Why does this skill require a .app bundle?

macOS requires a registered application bundle to receive and process URL scheme callbacks; xcall handles this registration automatically.

Which macOS apps are supported?

Any macOS app that supports x-callback-url can be used, including popular tools like Things 3, Bear, OmniFocus, and Drafts.

xcall is a tool that allows Claude Code to communicate with macOS apps using the x-callback-url protocol, enabling synchronous data retrieval from GUI apps.

Is the response from the app immediate?

Yes, xcall is designed to be synchronous, meaning it waits for the target app to respond and then outputs the result to your CLI.

Does this work on non-Mac systems?

No, xcall is specific to macOS as it relies on the macOS Launch Services and URL scheme architecture.

macOS x-callback-url Integrator

Name: macOS x-callback-url Integrator
Author: bendrucker

bybendrucker

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Productivity & Workflow

Invokes macOS app URL schemes synchronously from the command line to capture responses from productivity apps like Things, Bear, and OmniFocus.

The xcall skill enables Claude to interact directly with macOS applications that lack a native command-line interface but support the x-callback-url protocol. By utilizing a Swift-based helper compiled into a lightweight macOS app, it allows Claude to send commands to GUI applications and receive structured data—such as task IDs, note identifiers, or success confirmations—back into the terminal session. This bridge allows for complex workflow automation where Claude can manage your personal productivity stack as part of your development process.

Key Features

01Synchronous response capturing from macOS x-callback-url schemes

02Lightweight Swift implementation with cached builds for performance

03Automatic registration of the xcall-claude:// callback protocol

04Pre-configured support for Things 3, Bear, OmniFocus, and Drafts

05Detailed error handling with exit codes for success, error, and cancel

065 GitHub stars

Use Cases

01Integrating GUI-only macOS task managers into terminal-based developer workflows

02Programmatically creating and retrieving IDs for tasks in Things 3

03Automating the creation of meeting notes in Bear and capturing their UUIDs

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add bendrucker/claude xcall

For use in Claude.ai and ChatGPT

Download Skill