Xcode-Studio-MCP
Enables interaction with iOS apps running in the Simulator, including capturing screenshots, performing tap and type actions on UI elements, and retrieving the accessibility tree as JSON.
Enables building Xcode projects with structured error output (file, line, column, severity) and launching apps in the iOS Simulator.
xcode-studio-mcp
Unified MCP server for Xcode + iOS Simulator — build, deploy, screenshot, and interact with your iOS app from Claude Code, Cursor, or any MCP client.
Built in Swift. Single binary. No Node/Python runtime required.
Why This Exists
Today you need 2-3 separate tools to do the full iOS dev loop with an AI agent. xcode-studio-mcp combines them into one:
Write code → Build → Deploy to Simulator → Screenshot → Tap/Type → VerifyTools
Tool | Description |
| Build an Xcode project with structured error output (file, line, column, severity, message) |
| Build and launch an app in the iOS Simulator |
| Capture the Simulator screen as a PNG image |
| Tap at x,y coordinates on the Simulator screen |
| Type text into the currently focused field |
| Get the accessibility tree of the current screen (JSON) |
Tool Parameters
xcode_build
Parameter | Required | Description |
| Yes | Path to Xcode project directory, |
| No | Build scheme (auto-detected if omitted) |
| No |
|
| No | Build destination (defaults to booted simulator) |
xcode_run
Parameter | Required | Description |
| Yes | Path to Xcode project |
| Yes | App bundle ID (e.g. |
| No | Build scheme (auto-detected) |
| No | Target simulator (defaults to booted) |
simulator_screenshot
Parameter | Required | Description |
| No | Target simulator (defaults to booted) |
simulator_tap
Parameter | Required | Description |
| Yes | X coordinate |
| Yes | Y coordinate |
| No | Hold duration in seconds (for long press) |
| No | Target simulator |
simulator_type
Parameter | Required | Description |
| Yes | Text to type |
| No | Target simulator |
simulator_describe
Parameter | Required | Description |
| No | Target simulator |
Quick Start
Prerequisites
macOS with Xcode installed
For UI interaction tools (
tap,type,describe):brew tap facebook/fb && brew install idb-companion pip3 install fb-idb
Build
git clone https://github.com/kevinswint/xcode-studio-mcp.git
cd xcode-studio-mcp
swift build -c releaseConfigure Claude Code
Add to your Claude Code MCP settings:
{
"mcpServers": {
"xcode-studio-mcp": {
"command": "/path/to/xcode-studio-mcp/.build/release/XcodeStudioMCP"
}
}
}Example Workflow
You: Build and run my app at ~/Projects/MyApp
Claude: [calls xcode_build] Build succeeded with 0 errors
[calls xcode_run] App launched (PID 12345)
[calls simulator_screenshot] Here's what the app looks like...
[calls simulator_describe] I can see a "Sign In" button and email/password fields
[calls simulator_tap] Tapped the email field
[calls simulator_type] Typed "test@example.com"
[calls simulator_screenshot] Here's the current state...Architecture
┌─────────────────────────────┐
│ MCP Protocol Layer │ stdio transport (Swift MCP SDK)
├─────────────────────────────┤
│ Tool Implementations │ 6 tools, structured error output
├──────────┬──────────────────┤
│ xcodebuild│ simctl │ idb │ native process calls
│ wrapper │ wrapper │ CLI │
└──────────┴──────────┴──────┘Built in Swift with zero Node/Python runtime dependencies (idb CLI is only needed for UI interaction tools).
Roadmap
v0.1 (current): Core build + simulator tools
v1.0: Semantic UI navigation ("tap the Sign In button"), visual diff, Xcode project file manipulation, compound operations, SwiftUI preview capture
Related Projects
Project | What It Does | Difference |
Build + test only | No simulator UI interaction | |
Cross-platform simulator UI | No Xcode build support | |
Simulator via IDB | No build, depends on IDB for everything |
xcode-studio-mcp combines build and interact into a single server.
Contributing
PRs welcome. The codebase is ~750 lines of Swift organized into Tools, Services, and Models.
License
MIT
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