diff --git a/meshviewer/meshviewer.go b/meshviewer/meshviewer.go
new file mode 100644
index 0000000..62e4d32
--- /dev/null
+++ b/meshviewer/meshviewer.go
@@ -0,0 +1,54 @@
+package meshviewer
+
+import (
+	"sync"
+
+	"github.com/FreifunkBremen/respond-collector/data"
+	"github.com/FreifunkBremen/respond-collector/jsontime"
+)
+
+// Node struct
+type Node struct {
+	Firstseen  jsontime.Time    `json:"firstseen"`
+	Lastseen   jsontime.Time    `json:"lastseen"`
+	Flags      *Flags           `json:"flags,omitempty"`
+	Statistics *Statistics      `json:"statistics"`
+	Nodeinfo   *data.NodeInfo   `json:"nodeinfo"`
+	Neighbours *data.Neighbours `json:"-"`
+}
+
+type Flags struct {
+	Online  bool `json:"online"`
+	Gateway bool `json:"gateway"`
+}
+
+// Nodes struct: cache DB of Node's structs
+type Nodes struct {
+	Version   int              `json:"version"`
+	Timestamp jsontime.Time    `json:"timestamp"`
+	List      map[string]*Node `json:"nodes"` // the current nodemap, indexed by node ID
+	sync.Mutex
+}
+
+type Statistics struct {
+	NodeId      string      `json:"node_id"`
+	Clients     uint32      `json:"clients"`
+	RootFsUsage float64     `json:"rootfs_usage,omitempty""`
+	LoadAverage float64     `json:"loadavg,omitempty""`
+	Memory      data.Memory `json:"memory,omitempty""`
+	Uptime      float64     `json:"uptime,omitempty""`
+	Idletime    float64     `json:"idletime,omitempty""`
+	Gateway     string      `json:"gateway,omitempty"`
+	Processes   struct {
+		Total   uint32 `json:"total"`
+		Running uint32 `json:"running"`
+	} `json:"processes,omitempty""`
+	MeshVpn *data.MeshVPN `json:"mesh_vpn,omitempty"`
+	Traffic struct {
+		Tx      *data.Traffic `json:"tx"`
+		Rx      *data.Traffic `json:"rx"`
+		Forward *data.Traffic `json:"forward"`
+		MgmtTx  *data.Traffic `json:"mgmt_tx"`
+		MgmtRx  *data.Traffic `json:"mgmt_rx"`
+	} `json:"traffic,omitempty""`
+}