An MCP (Model Context Protocol) server that lets AI assistants like Claude and Cursor manage your cron job monitors on CronSignal.

CronSignal is a cron job monitoring service. Add a simple ping to your cron jobs - if we don't hear from them on time, we alert you. We also capture job output so you can see exactly what went wrong.

1. Go to cronsignal.io/mcp
2. Create an API key
3. Copy it - you'll only see it once!

Add to your Cursor settings (~/.cursor/mcp.json):

{
  "mcpServers": {
    "cronsignal": {
      "command": "npx",
      "args": ["cronsignal-mcp"],
      "env": {
        "CRONSIGNAL_API_KEY": "cs_live_your_key_here"
      }
    }
  }
}

Add to your Claude config:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "cronsignal": {
      "command": "npx",
      "args": ["cronsignal-mcp"],
      "env": {
        "CRONSIGNAL_API_KEY": "cs_live_your_key_here"
      }
    }
  }
}

After adding the config, restart Cursor or Claude Desktop to load the MCP server.

You: "Create a monitor for my nightly backup that runs at 2 AM"

Assistant: Creates a monitor with 24-hour period and provides:

• The ping URL
• Ready-to-use curl commands
• Code snippets for output capture

You: "Why is my backup job failing?"

Assistant: Uses diagnose_check to:

• Check the monitor status
• Analyze recent exit codes
• Look for error patterns in captured output
• Suggest specific fixes

You: "How are my monitors doing?"

Assistant: Lists all monitors with their status, last ping time, and uptime.

CronSignal captures the output (stdout/stderr) of your cron jobs. To enable this, pipe your job's output to the ping:

# Capture output and send to CronSignal
your-backup-script 2>&1 | curl -fsS -X POST -d @- https://api.cronsignal.io/ping/YOUR_CHECK_ID
# Include exit code
your-backup-script; curl -fsS "https://api.cronsignal.io/ping/YOUR_CHECK_ID?exit_code=$?"

This lets AI assistants read the actual error messages when diagnosing failures.

• CronSignal - Main website
• MCP Setup - Get your API key
• Documentation - Full documentation

MIT