Alertmanager MCP Server

This project provides a server that interacts with Alertmanager through the Model Context Protocol (MCP). It allows you to perform actions such as retrieving alerts and managing silences.

Features

• Get Alerts: Retrieve a list of current alerts from Alertmanager.
• Get Silences: Fetch the list of active silences.
• Set Silences: Create new silences for specific alerts.

Getting Started

To get the server up and running, follow these steps.

Prerequisites

• Go 1.24.2 or higher
• A running instance of Alertmanager

Installation & Running

1. Clone the repository:

   git clone https://github.com/zhangzleee/alertmanager-mcp-server.git
   cd alertmanager-mcp-server
   

2. Build and run the server:

   You can run the server using the following command. By default, it connects to an Alertmanager instance at http://localhost:9093.

   go run ./cmd/main.go server
   

Usage

The server can be configured with the following command-line flags:

• -host: The host to listen on (default: localhost).
• -port: The port to listen on (default: 8000).
• -alertmanager-url: The URL of the Alertmanager instance (default: http://localhost:9093).

Examples

• Run with default settings:

  go run ./cmd/main.go server
  

• Run on a different port and host:

  go run ./cmd/main.go server -port 9000 -host 0.0.0.0
  

• Connect to a different Alertmanager instance:

  go run ./cmd/main.go server -alertmanager-url http://your-alertmanager-host:9093
  

Tools

This server exposes the following tools via MCP:

get_alerts

Retrieves a list of alerts from Alertmanager. You can filter alerts by their status.

Parameters:

• active: (string, optional) Filter by active alerts. Default: false.
• silenced: (string, optional) Filter by silenced alerts. Default: false.
• inhibited: (string, optional) Filter by inhibited alerts. Default: false.
• unprocessed: (string, optional) Filter by unprocessed alerts. Default: false.

Example Usage:

To get all active and silenced alerts:

{
  "tool_name": "get_alerts",
  "parameters": {
    "active": "true",
    "silenced": "true"
  }
}

get_silences

Retrieves a list of silences from Alertmanager.

Parameters:

• active: (string, optional) Filter by active silences. Default: true.

Example Usage:

To get all active silences:

{
  "tool_name": "get_silences",
  "parameters": {
    "active": "true"
  }
}

set_silences

Creates a new silence in Alertmanager.

Parameters:

• comment: (string, required) A comment to describe the silence.
• createdBy: (string, required) The creator of the silence.
• startsAt: (string, required) The start time of the silence in RFC3339 format (e.g., 2025-11-07T05:56:07.402Z).
• endsAt: (string, required) The end time of the silence in RFC3339 format (e.g., 2025-11-07T06:56:07.402Z).
• matchers: (array, required) A list of matchers to identify the alerts to be silenced. Each matcher requires name, value, isRegex, and isEqual fields.

Example Usage:

To set a silence for alerts with the label severity equal to critical:

{
  "tool_name": "set_silences",
  "parameters": {
    "comment": "Silence critical alerts for maintenance",
    "createdBy": "admin",
    "startsAt": "2025-11-07T05:56:07.402Z",
    "endsAt": "2025-11-07T06:56:07.402Z",
    "matchers": [
      {
        "name": "severity",
        "value": "critical",
        "isRegex": false,
        "isEqual": true
      }
    ]
  }
}

Contributing

Contributions are welcome! Please feel free to submit a pull request.

License

This project is licensed under the MIT License - see the LICENSE file for details.