diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..36efbd1
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+MATTERMOST_WEBHOOK_URL=
+MATTERMOST_CHANNEL=
diff --git a/README.md b/README.md
index 81ce4f2..2f30ca3 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ Dedicated mainly to report CNPG cluster status.
 
 ## Getting Started
 
+Copy and edit `.env.example`. Leave empty values for mattermost if you don't want to use it.
+
 Run the development daemon:
 
 ```bash
diff --git a/package.json b/package.json
index d0ef06a..bb86874 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "license": "MIT",
   "scripts": {
     "build": "tsc && tsc-alias",
-    "dev": "FORCE_COLOR=true tsx watch src/**/*.ts | pino-pretty",
+    "dev": "FORCE_COLOR=true tsx watch --env-file=.env src/**/*.ts | pino-pretty",
     "lint": "eslint src/**/*.ts && prettier --check src/**/*.ts",
     "format": "prettier --write src/**/*.ts",
     "postinstall": "is-ci || husky install",
diff --git a/src/lib/config.ts b/src/lib/config.ts
new file mode 100644
index 0000000..7421493
--- /dev/null
+++ b/src/lib/config.ts
@@ -0,0 +1,17 @@
+import { logger } from "./logger"
+
+export const MATTERMOST_WEBHOOK_URL: string | undefined =
+  process.env.MATTERMOST_WEBHOOK_URL
+export const MATTERMOST_CHANNEL: string | undefined =
+  process.env.MATTERMOST_CHANNEL
+
+if (!MATTERMOST_WEBHOOK_URL) {
+  logger.info("MATTERMOST_WEBHOOK_URL not configured")
+}
+
+if (MATTERMOST_WEBHOOK_URL && !MATTERMOST_CHANNEL) {
+  logger.error(
+    "MATTERMOST_WEBHOOK_URL is defined so MATTERMOST_CHANNEL is required"
+  )
+  process.exit(1)
+}
diff --git a/src/lib/kube-watcher.ts b/src/lib/kube-watcher.ts
index 013275d..c8dd1db 100644
--- a/src/lib/kube-watcher.ts
+++ b/src/lib/kube-watcher.ts
@@ -10,6 +10,7 @@ import {
   getCnpgClusterArchivingStatus,
 } from "@/lib/kube/types"
 import { logger } from "@/lib/logger"
+import { sendNotification } from "@/lib/mattermost"
 
 const allContexts = ["dev", "prod", "ovh-dev", "ovh-prod"]
 
@@ -176,13 +177,19 @@ function checkCnpgCluster(
   const cacheKey = JSON.stringify(status)
   const alertInCache = alertCache.has(cacheKey)
 
+  const mattermostFields = Object.entries(status).map(([key, value]) => {
+    return { title: key, value: String(value) }
+  })
+
   if (statusOk && !alertInCache) {
     return
   } else if (statusOk && alertInCache) {
     logger.info(status, "cnpgCluster alert resolved")
+    sendNotification(statusOk, "cnpgCluster alert resolved", mattermostFields)
     alertCache.delete(cacheKey)
   } else if (!statusOk && !alertInCache) {
     logger.error(status, "cnpgCluster alert")
+    sendNotification(statusOk, "cnpgCluster alert", mattermostFields)
     alertCache.set(cacheKey, true)
   }
 
diff --git a/src/lib/mattermost.ts b/src/lib/mattermost.ts
new file mode 100644
index 0000000..ef6d0ee
--- /dev/null
+++ b/src/lib/mattermost.ts
@@ -0,0 +1,36 @@
+import { MATTERMOST_WEBHOOK_URL, MATTERMOST_CHANNEL } from "@/lib/config"
+import { logger } from "@/lib/logger"
+
+export async function sendNotification(
+  status: boolean,
+  title: string,
+  fields: { title: string; value: string }[]
+) {
+  if (!MATTERMOST_WEBHOOK_URL) {
+    return
+  }
+
+  try {
+    await fetch(MATTERMOST_WEBHOOK_URL, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        channel: MATTERMOST_CHANNEL,
+        author_name: "kubesight-alerts",
+        attachments: [
+          {
+            color: status ? "#00FF00" : "#FF0000",
+            title,
+            fields: fields.map((field) => {
+              return { ...field, short: true }
+            }),
+          },
+        ],
+      }),
+    })
+  } catch (error) {
+    logger.error({ error }, "Failed to send Mattermost notification")
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
index 3c79456..a34062f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -15,6 +15,6 @@
       "@/*": ["./src/*"],
     }
   },
-  "include":["./src/*"],
+  "include":["./src/*", "src/lib/config.ts"],
   "exclude": ["node_modules"]
 }