Alertmanager MCP Server (Go)

A Model Context Protocol (MCP) server for Prometheus Alertmanager integration. Native Go binary with built-in Kubernetes connectivity via client-go.

Installation

npx

npx -y mcp-alertmanager@latest

MCP Client Configuration

Add to your MCP client configuration (VS Code, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "alertmanager": {
      "command": "npx",
      "args": ["-y", "mcp-alertmanager@latest"],
      "env": {
        "ALERTMANAGER_URL": "http://localhost:9093"
      }
    }
  }
}

VS Code

code --add-mcp '{"name":"alertmanager","command":"npx","args":["-y","mcp-alertmanager@latest"],"env":{"ALERTMANAGER_URL":"http://localhost:9093"}}'

Kubernetes Auto-Connect

Automatically connects to Alertmanager running in OpenShift/Kubernetes via the K8S API service proxy. Uses native kubeconfig/in-cluster config via client-go. No kubectl or port-forwarding required.

Default: openshift-monitoring/alertmanager-operated:9093

{
  "mcpServers": {
    "alertmanager": {
      "command": "npx",
      "args": ["-y", "mcp-alertmanager@latest"]
    }
  }
}

Binary

Download from GitHub Releases or build from source:

make build
./mcp-alertmanager

---

Configuration

Environment Variables

Variable	Description
ALERTMANAGER_URL	Direct Alertmanager API URL (overrides K8S auto-connect)

CLI Flags

Flag	Description	Default
--url	Direct Alertmanager URL	-
--namespace	Kubernetes namespace	openshift-monitoring
--service	Kubernetes service name	alertmanager-operated
--service-port	Kubernetes service port	9093
--service-scheme	Service scheme (http/https)	https
--kubeconfig	Path to kubeconfig file	auto-detect

Precedence: --url / ALERTMANAGER_URL > K8S auto-connect

Connection strategy:

1. Direct URL (if --url or ALERTMANAGER_URL is set)
2. K8S API proxy (auto-detect kubeconfig or in-cluster config)

---

Tools (12)

Alerts

Tool	Description
getAlerts	Get alerts with optional filters
getAlertGroups	Get alerts grouped by routing labels
getCriticalAlerts	Get critical severity alerts only
getAlertingSummary	Summary: counts by severity, top alerts, namespaces

Silences

Tool	Description
getSilences	List silences by state
createSilence	Create a silence for an alert
deleteSilence	Delete a silence by ID

Status

Tool	Description
getAlertmanagerStatus	Server status, version, cluster info
getReceivers	List notification receivers

Troubleshooting

Tool	Description
investigateAlert	Deep investigation of a specific alert
getAlertHistory	Alert history and analysis guidance
correlateAlerts	Find correlated alerts by shared labels

---

Example Prompts

"What alerts are currently firing?"
"Are there any critical alerts?"
"Give me a summary of the alerting status"
"Investigate the HighMemoryUsage alert"
"Create a 2-hour silence for PodCrashLooping"
"What receivers are configured?"
"Find correlated alerts to identify the root cause"
"Show me alert history for KubeNodeNotReady"

---

Development

Build

make build              # Build for current platform
make build-all-platforms # Cross-compile for all platforms

Container

podman build -f Containerfile -t mcp-alertmanager .

---

Kubernetes / OpenShift Deployment

Container Image

The container image is available on GitHub Container Registry:

ghcr.io/jeanlopezxyz/mcp-alertmanager:latest

Helm Chart

Deploy using the included Helm chart:

# Add the chart repository (or use local chart)
helm upgrade --install mcp-alertmanager ./charts/mcp-alertmanager \
  --namespace mcp-servers \
  --create-namespace \
  --set openshift=true

Helm Values

Parameter	Description	Default
image.registry	Container registry	ghcr.io
image.repository	Image repository	jeanlopezxyz/mcp-alertmanager
image.version	Image tag	latest
openshift	Enable OpenShift Routes	false
service.port	Service port	8080
alertmanager.namespace	Alertmanager namespace	openshift-monitoring
alertmanager.service	Alertmanager service name	alertmanager-operated
rbac.useClusterReader	Use cluster-reader role	true

Example with custom Alertmanager

helm upgrade --install mcp-alertmanager ./charts/mcp-alertmanager \
  --namespace mcp-servers \
  --set openshift=true \
  --set alertmanager.url=http://alertmanager.monitoring:9093

---

License

MIT