CloudWatch MCP Server

This simplified MCP server provides a streamlined way to interact with AWS CloudWatch resources through the MCP protocol. It exposes CloudWatch log groups, log queries, and alarms as resources and tools.

Features

• List all CloudWatch log groups with their metadata
• List all CloudWatch alarms with their current states
• Query CloudWatch logs using CloudWatch Insights across multiple log groups
• Discover available fields across multiple log groups with shared schema
• Automatic JSON parsing for @message field in log queries
• Check if specific log groups exist
• Get detailed information about specific log groups
• Filter alarms by state (all alarms or only those in ALARM state)
• Retrieve all saved CloudWatch Logs Insights queries

Prerequisites

• Python 3.12 or higher
• AWS credentials configured (via environment variables, AWS CLI, or IAM role)
• MCP CLI (version 0.1.1 or higher)
• Boto3 (AWS SDK for Python)

Setup

1. Make sure you have Python 3.12+ installed.

2. Create a virtual environment (optional but recommended):

python -m venv .venv
   source .venv/bin/activate  # On Windows: .venv\Scripts\activate

3. Install dependencies:

pip install -r requirements.txt

4. Configure AWS credentials if you haven't already:

aws configure

Or set environment variables:

export AWS_ACCESS_KEY_ID="your-access-key"
   export AWS_SECRET_ACCESS_KEY="your-secret-key"
   export AWS_REGION="your-region"

Project Structure

• cloudwatch_server.py - MCP server implementation for CloudWatch integration
• aws_cloudwatch.py - Simplified AWS CloudWatch integration module
• test_cloudwatch.py - Command-line utility to test the CloudWatch integration

Running the server

Start the MCP server:

python cloudwatch_server.py

Or using the MCP CLI:

mcp run cloudwatch_server.py

Using the MCP server

Resources

The server exposes the following resources:

• cloudwatch://log-groups - Lists all CloudWatch log groups
• cloudwatch://log-groups/{log_group_name} - Gets detailed information about a specific log group
• cloudwatch://alarms - Lists all CloudWatch alarms
• cloudwatch://alarms/in-alarm - Lists only CloudWatch alarms currently in ALARM state
• cloudwatch://saved-queries - Lists all saved CloudWatch Logs Insights queries

Tools

The server provides the following tools:

• query_logs - Query CloudWatch logs using CloudWatch Insights
• Parameters:
• log_group_names: Single log group name or list of log group names to query
• query_string: CloudWatch Insights query string
• start_time: (Optional) Start time for the query in Unix timestamp milliseconds
• end_time: (Optional) End time for the query in Unix timestamp milliseconds
• Features:
• Automatically parses JSON in @message field
• Returns structured data for JSON messages
• Handles multiple log groups in a single query

• discover_log_fields - Discover available fields across multiple log groups
• Parameters:
• log_group_names: Single log group name or list of log group names to analyze
• Features:
• Efficiently discovers fields across multiple log groups
• Assumes shared schema across log groups
• Detects nested JSON fields in @message
• Identifies field types (number, boolean, string, array)

• log_group_exists - Check if CloudWatch log groups exist
• Parameters:
• log_group_names: Single log group name or list of log group names to check
• Returns:
• Dictionary mapping each log group to its existence status

• get_saved_queries - Fetch all saved CloudWatch Logs Insights queries
• No parameters required

Testing the CloudWatch integration

You can test the CloudWatch integration directly using the provided test script:

# Make the test file executable
chmod +x test_cloudwatch.py

# List all log groups
./test_cloudwatch.py log-groups

# List all alarms
./test_cloudwatch.py alarms

# Use a specific AWS profile
./test_cloudwatch.py log-groups --profile my-profile

# Enable verbose logging
./test_cloudwatch.py alarms -v

Examples with MCP CLI

Using the MCP CLI:

# List all log groups
mcp inspect cloudwatch://log-groups

# Get details about a specific log group
mcp inspect cloudwatch://log-groups/my-log-group-name

# List all alarms
mcp inspect cloudwatch://alarms

# List alarms currently in ALARM state
mcp inspect cloudwatch://alarms/in-alarm

# List all saved CloudWatch Logs Insights queries
mcp inspect cloudwatch://saved-queries

# Query logs from multiple log groups using CloudWatch Insights
mcp call query_logs --log_group_names '["log-group-1", "log-group-2"]' --query_string "fields @timestamp, @message | limit 10"

# Query logs from a single log group (still supported)
mcp call query_logs --log_group_names "my-log-group" --query_string "fields @timestamp, @message | limit 10"

# Discover fields across multiple log groups
mcp call discover_log_fields --log_group_names '["log-group-1", "log-group-2"]'

# Check if multiple log groups exist
mcp call log_group_exists --log_group_names '["log-group-1", "log-group-2"]'

# Get all saved CloudWatch Logs Insights queries
mcp call get_saved_queries

License

MIT