Codemagic MCP Server

A local Python MCP server that exposes the Codemagic CI/CD REST API as Claude-callable tools. Trigger builds, manage apps, download artifacts, and clear caches — all from Claude Code or Claude Desktop without leaving the chat.

Tools

Apps

Builds

Artifacts

Caches

Environment Variables

Webhooks

⚠️ These tools are marked as destructive and will prompt for confirmation before executing.

Quick Start

The fastest way to get running with Claude Code — no separate install step needed:

# 1. Add the server (uses uvx to run it on-demand)
claude mcp add codemagic -e CODEMAGIC_API_KEY=your-api-key-here -- uvx codemagic-mcp

# 2. Restart Claude Code — tools will appear in /tools

That's it. See Configuration for optional settings like CODEMAGIC_DEFAULT_APP_ID.

Installation

Requirements: Python 3.11+

Option 1 — uvx (recommended, no install needed)

uvx codemagic-mcp

Option 2 — pip

pip install codemagic-mcp

Option 3 — from source

git clone https://github.com/AgiMaulana/CodemagicMcp.git
cd CodemagicMcp
python3 -m venv .venv
.venv/bin/pip install -e .

Configuration

Get your API token from Codemagic User Settings → Integrations → Codemagic API.

You can provide settings as environment variables or via a .env file:

# .env
CODEMAGIC_API_KEY=your-api-key-here

# Optional: set a default app so you don't have to specify it every time
CODEMAGIC_DEFAULT_APP_ID=your-app-id-here

# Optional: customize managed temp log storage for get_step_logs(..., delivery="file")
CODEMAGIC_LOG_TEMP_DIR=/tmp/codemagic-mcp
CODEMAGIC_LOG_TTL_SECONDS=3600
CODEMAGIC_LOG_CLEANUP_INTERVAL_SECONDS=300
CODEMAGIC_LOG_MAX_TOTAL_BYTES=524288000
CODEMAGIC_LOG_MAX_FILE_COUNT=200

Default App ID

CODEMAGIC_DEFAULT_APP_ID is optional but recommended if you work primarily with one app. When set, the AI will use it automatically whenever a tool requires an app_id and none was specified. If it is not set, the AI will:

1. Call list_apps to discover available apps.
2. Use the app automatically if only one exists.
3. Present the list and ask you to choose if multiple apps are found.

Step Log File Delivery

get_step_logs supports two delivery modes:

• delivery="file" is the default and writes the log to a managed local temp file, returning metadata such as artifact_id, file_path, bytes, line_count, and expires_at.
• delivery="inline" returns the raw step log text directly.

The local file mode is useful when a step log is too large to comfortably return inline. Managed log files are stored under CODEMAGIC_LOG_TEMP_DIR and expired files are cleaned up opportunistically whenever a new log file is written. The default retention window is controlled by CODEMAGIC_LOG_TTL_SECONDS and defaults to 3600 seconds.

The server also runs a startup cleanup pass and a periodic background cleanup loop. The loop interval is controlled by CODEMAGIC_LOG_CLEANUP_INTERVAL_SECONDS and defaults to 300 seconds. As an additional safety backstop, the managed temp directory is capped by CODEMAGIC_LOG_MAX_TOTAL_BYTES and CODEMAGIC_LOG_MAX_FILE_COUNT; when either cap is exceeded, the oldest files are evicted first.

get_step_log_artifact(build_id, step_id) checks whether that managed artifact still exists without calling Codemagic again or returning the file contents. The artifact metadata includes a deterministic artifact_id in this format:

artifact_<build_id>_<step_id>

If the artifact is missing, the server returns status="missing" with reason not_generated_or_expired, which means the file was either never generated or it expired and was deleted.

Register with Claude Code

Run the following command to add the server:

claude mcp add codemagic -- codemagic-mcp

Then set your API key in the MCP env config, or export it in your shell before starting Claude Code:

export CODEMAGIC_API_KEY=your-api-key-here

Alternatively, add it manually to ~/.claude.json:

{
  "mcpServers": {
    "codemagic": {
      "command": "codemagic-mcp",
      "env": {
        "CODEMAGIC_API_KEY": "your-api-key-here",
        "CODEMAGIC_DEFAULT_APP_ID": "your-app-id-here"
      }
    }
  }
}

Using uvx (no prior installation needed)

{
  "mcpServers": {
    "codemagic": {
      "command": "uvx",
      "args": ["codemagic-mcp"],
      "env": {
        "CODEMAGIC_API_KEY": "your-api-key-here",
        "CODEMAGIC_DEFAULT_APP_ID": "your-app-id-here"
      }
    }
  }
}

Restart Claude Code — the tools will appear in /tools.

Register with Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "codemagic": {
      "command": "codemagic-mcp",
      "env": {
        "CODEMAGIC_API_KEY": "your-api-key-here",
        "CODEMAGIC_DEFAULT_APP_ID": "your-app-id-here"
      }
    }
  }
}

Restart Claude Desktop to pick up the changes.

Project Structure

codemagic_mcp/
├── config.py        # pydantic-settings config (validates API key at startup)
├── client.py        # httpx async client, one method per endpoint
├── server.py        # FastMCP instance
└── tools/
    ├── apps.py
    ├── builds.py
    ├── artifacts.py
    ├── caches.py
    ├── variables.py
    └── webhooks.py

Adding New Tools

1. Add a method to client.py
2. Add the tool function to the relevant tools/*.py file
3. That's it — server.py never needs to change