--- proxmox_ve_by_http_original.yaml
+++ proxmox_ve_by_http_with_snapshots.yaml
@@ -186,6 +186,6 @@
           filter:
             evaltype: AND
             conditions:
               - macro: '{#RESOURCE.TYPE}'
                 value: ^lxc$
@@ -419,6 +419,77 @@
                 - tag: node
                   value: '{#NODE.NAME}'
+            - uuid: 7ece2f76f41a469e848395931a809bf1
+              name: 'LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Snapshot max age'
+              type: DEPENDENT
+              key: 'proxmox.lxc.snapshot.age[{#LXC.ID}]'
+              delay: '0'
+              units: s
+              description: 'Age of oldest snapshot in seconds.'
+              preprocessing:
+                - type: JAVASCRIPT
+                  parameters:
+                    - |
+                      try {
+                        var data = JSON.parse(value).data;
+                        var snapshots = data.filter(function(s) { return s.name !== 'current'; });
+                        if (snapshots.length === 0) return 0;
+                        var now = Math.floor(Date.now() / 1000);
+                        var oldest = Math.min.apply(null, snapshots.map(function(s) { return s.snaptime || now; }));
+                        return now - oldest;
+                      } catch (e) {
+                        return 0;
+                      }
+              master_item:
+                key: 'proxmox.lxc.snapshots[{#LXC.ID}]'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: lxc
+                  value: '{#LXC.ID}'
+                - tag: name
+                  value: '{#LXC.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
+            - uuid: 2d8c7c1394aa44fd95a187f3747321f6
+              name: 'LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Snapshot count'
+              type: DEPENDENT
+              key: 'proxmox.lxc.snapshot.count[{#LXC.ID}]'
+              delay: '0'
+              description: 'Number of snapshots (excluding current).'
+              preprocessing:
+                - type: JSONPATH
+                  parameters:
+                    - '$.data[?(@.name != "current")].length()'
+                  error_handler: CUSTOM_VALUE
+                  error_handler_params: '0'
+              master_item:
+                key: 'proxmox.lxc.snapshots[{#LXC.ID}]'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: lxc
+                  value: '{#LXC.ID}'
+                - tag: name
+                  value: '{#LXC.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
+            - uuid: 4879f45df9e043efa10a6fa5d9610d10
+              name: 'LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Snapshot data'
+              type: HTTP_AGENT
+              key: 'proxmox.lxc.snapshots[{#LXC.ID}]'
+              delay: 5m
+              history: '0'
+              value_type: TEXT
+              description: 'Get LXC snapshot list.'
+              url: 'https://{$PVE.URL.HOST}:{$PVE.URL.PORT}/api2/json/nodes/{#NODE.NAME}/{#LXC.ID}/snapshot'
+              headers:
+                - name: Authorization
+                  value: 'PVEAPIToken={$PVE.TOKEN.ID}={$PVE.TOKEN.SECRET}'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: lxc
+                  value: '{#LXC.ID}'
+                - tag: name
+                  value: '{#LXC.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
             - uuid: bd213f6de4db4e1e84894b80acffa330
               name: 'LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Uptime'
               type: DEPENDENT
@@ -484,6 +555,16 @@
                     - tag: scope
                       value: notice
           trigger_prototypes:
+            - uuid: 90d0ad425bc841fea3029c4743d2cfee
+              expression: '(last(/Proxmox VE by HTTP/proxmox.lxc.snapshot.count[{#LXC.ID}])>{$PVE.SNAPSHOT.COUNT.MAX.WARN} and min(/Proxmox VE by HTTP/proxmox.lxc.snapshot.count[{#LXC.ID}],1h)>{$PVE.SNAPSHOT.COUNT.MAX.WARN}) or (last(/Proxmox VE by HTTP/proxmox.lxc.snapshot.age[{#LXC.ID}])>{$PVE.SNAPSHOT.AGE.MAX.WARN} and min(/Proxmox VE by HTTP/proxmox.lxc.snapshot.age[{#LXC.ID}],1h)>{$PVE.SNAPSHOT.AGE.MAX.WARN})'
+              name: 'Proxmox VE: LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Snapshot issue detected'
+              event_name: 'Proxmox VE: LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: Too many or old snapshots'
+              opdata: 'Count: {ITEM.LASTVALUE1}, Max age: {ITEM.LASTVALUE2}s'
+              priority: WARNING
+              description: 'Either more than {$PVE.SNAPSHOT.COUNT.MAX.WARN} snapshots exist or oldest snapshot is older than {$PVE.SNAPSHOT.AGE.MAX.WARN} seconds (24h).'
+              tags:
+                - tag: scope
+                  value: capacity
             - uuid: 1e362fac13634a3dabebbd6ceb59879f
               expression: 'min(/Proxmox VE by HTTP/proxmox.lxc.disk[{#LXC.ID}],5m) / last(/Proxmox VE by HTTP/proxmox.lxc.maxdisk[{#LXC.ID}]) * 100 > {$PVE.LXC.DISK.PUSE.MAX.WARN:"{#LXC.ID}"}'
               name: 'Proxmox VE: LXC [{#NODE.NAME}/{#LXC.NAME} ({#LXC.ID})]: high disk space usage'
@@ -1111,6 +1108,6 @@
           filter:
             evaltype: AND
             conditions:
               - macro: '{#RESOURCE.TYPE}'
                 value: ^qemu$
           item_prototypes:
@@ -1352,6 +1433,77 @@
                 - tag: qemu
                   value: '{#QEMU.ID}'
+            - uuid: 26f4c9df03d44bcf92a8237007ca9cdc
+              name: 'VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Snapshot max age'
+              type: DEPENDENT
+              key: 'proxmox.qemu.snapshot.age[{#QEMU.ID}]'
+              delay: '0'
+              units: s
+              description: 'Age of oldest snapshot in seconds.'
+              preprocessing:
+                - type: JAVASCRIPT
+                  parameters:
+                    - |
+                      try {
+                        var data = JSON.parse(value).data;
+                        var snapshots = data.filter(function(s) { return s.name !== 'current'; });
+                        if (snapshots.length === 0) return 0;
+                        var now = Math.floor(Date.now() / 1000);
+                        var oldest = Math.min.apply(null, snapshots.map(function(s) { return s.snaptime || now; }));
+                        return now - oldest;
+                      } catch (e) {
+                        return 0;
+                      }
+              master_item:
+                key: 'proxmox.qemu.snapshots[{#QEMU.ID}]'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: name
+                  value: '{#QEMU.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
+                - tag: qemu
+                  value: '{#QEMU.ID}'
+            - uuid: 0e67756159f142f0a7951bf1cb66261b
+              name: 'VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Snapshot count'
+              type: DEPENDENT
+              key: 'proxmox.qemu.snapshot.count[{#QEMU.ID}]'
+              delay: '0'
+              description: 'Number of snapshots (excluding current).'
+              preprocessing:
+                - type: JSONPATH
+                  parameters:
+                    - '$.data[?(@.name != "current")].length()'
+                  error_handler: CUSTOM_VALUE
+                  error_handler_params: '0'
+              master_item:
+                key: 'proxmox.qemu.snapshots[{#QEMU.ID}]'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: name
+                  value: '{#QEMU.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
+                - tag: qemu
+                  value: '{#QEMU.ID}'
+            - uuid: 39097ea7c26341c7964548aa620202f5
+              name: 'VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Snapshot data'
+              type: HTTP_AGENT
+              key: 'proxmox.qemu.snapshots[{#QEMU.ID}]'
+              delay: 5m
+              history: '0'
+              value_type: TEXT
+              description: 'Get VM snapshot list.'
+              url: 'https://{$PVE.URL.HOST}:{$PVE.URL.PORT}/api2/json/nodes/{#NODE.NAME}/{#QEMU.ID}/snapshot'
+              headers:
+                - name: Authorization
+                  value: 'PVEAPIToken={$PVE.TOKEN.ID}={$PVE.TOKEN.SECRET}'
+              tags:
+                - tag: component
+                  value: snapshot
+                - tag: name
+                  value: '{#QEMU.NAME}'
+                - tag: node
+                  value: '{#NODE.NAME}'
+                - tag: qemu
+                  value: '{#QEMU.ID}'
             - uuid: 77ba70e0ce6f486585f870d3b57033ba
               name: 'VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Uptime'
               type: DEPENDENT
@@ -1417,6 +1569,16 @@
                     - tag: scope
                       value: notice
           trigger_prototypes:
+            - uuid: de6b4be6b7f14c70a896e230d92f7e86
+              expression: '(last(/Proxmox VE by HTTP/proxmox.qemu.snapshot.count[{#QEMU.ID}])>{$PVE.SNAPSHOT.COUNT.MAX.WARN} and min(/Proxmox VE by HTTP/proxmox.qemu.snapshot.count[{#QEMU.ID}],1h)>{$PVE.SNAPSHOT.COUNT.MAX.WARN}) or (last(/Proxmox VE by HTTP/proxmox.qemu.snapshot.age[{#QEMU.ID}])>{$PVE.SNAPSHOT.AGE.MAX.WARN} and min(/Proxmox VE by HTTP/proxmox.qemu.snapshot.age[{#QEMU.ID}],1h)>{$PVE.SNAPSHOT.AGE.MAX.WARN})'
+              name: 'Proxmox VE: VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Snapshot issue detected'
+              event_name: 'Proxmox VE: VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})]: Too many or old snapshots'
+              opdata: 'Count: {ITEM.LASTVALUE1}, Max age: {ITEM.LASTVALUE2}s'
+              priority: WARNING
+              description: 'Either more than {$PVE.SNAPSHOT.COUNT.MAX.WARN} snapshots exist or oldest snapshot is older than {$PVE.SNAPSHOT.AGE.MAX.WARN} seconds (24h).'
+              tags:
+                - tag: scope
+                  value: capacity
             - uuid: 5305bf2b71aa4b74917379c6e1b3c065
               expression: 'min(/Proxmox VE by HTTP/proxmox.qemu.mem[{#QEMU.ID}],5m) / last(/Proxmox VE by HTTP/proxmox.qemu.maxmem[{#QEMU.ID}]) * 100 >{$PVE.VM.MEMORY.PUSE.MAX.WARN:"{#QEMU.ID}"}'
               name: 'Proxmox VE: VM [{#NODE.NAME}/{#QEMU.NAME} ({#QEMU.ID})] high memory usage'
@@ -1629,6 +1791,14 @@
         - macro: '{$PVE.ROOT.PUSE.MAX.WARN}'
           value: '90'
           description: 'Maximum used root space in percentage.'
+        - macro: '{$PVE.SNAPSHOT.AGE.MAX.WARN}'
+          value: '86400'
+          description: 'Maximum age of oldest snapshot in seconds (default 24h = 86400s) before triggering a warning.'
+        - macro: '{$PVE.SNAPSHOT.COUNT.MAX.WARN}'
+          value: '6'
+          description: 'Maximum number of snapshots before triggering a warning.'
         - macro: '{$PVE.STORAGE.PUSE.MAX.WARN}'
           value: '90'
           description: 'Maximum used storage space in percentage.'