diff --git a/collector/mempool.go b/collector/mempool.go
index 9867c0c..40c7921 100644
--- a/collector/mempool.go
+++ b/collector/mempool.go
@@ -2,16 +2,20 @@ package collector
 
 import (
 	"context"
+	"net/http"
 	"sync"
+	"time"
 
 	"github.com/ecadlabs/go-tezos"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+// MempoolOperationsCollector collects mempool operations count
 type MempoolOperationsCollector struct {
-	prometheus.Collector // refers to counter
+	counter        *prometheus.CounterVec
+	rpcTotalHist   prometheus.Histogram
+	rpcConnectHist prometheus.Histogram
 
-	counter *prometheus.CounterVec
 	service *tezos.Service
 	chainID string
 	wg      sync.WaitGroup
@@ -40,22 +44,41 @@ func (m *MempoolOperationsCollector) listener(ctx context.Context, pool string)
 	}
 }
 
+// NewMempoolOperationsCollectorCollector returns new mempool collector for given pools like "applied", "refused" etc.
 func NewMempoolOperationsCollectorCollector(service *tezos.Service, chainID string, pools []string) *MempoolOperationsCollector {
-	counter := prometheus.NewCounterVec(
-		prometheus.CounterOpts{
-			Name: "tezos_node_mempool_operations_total",
-			Help: "The total number of mempool operations.",
-		},
-		[]string{"pool", "proto", "kind"},
-	)
-
-	c := MempoolOperationsCollector{
-		Collector: counter,
-		counter:   counter,
-		service:   service,
-		chainID:   chainID,
+	c := &MempoolOperationsCollector{
+		counter: prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Name: "tezos_node_mempool_operations_total",
+				Help: "The total number of mempool operations.",
+			},
+			[]string{"pool", "proto", "kind"},
+		),
+		rpcTotalHist: prometheus.NewHistogram(prometheus.HistogramOpts{
+			Name:    "tezos_rpc_mempool_monitor_connection_total_duration_milliseconds",
+			Help:    "The total life time of the mempool monitir RPC connection.",
+			Buckets: prometheus.ExponentialBuckets(250, 2, 10),
+		}),
+		rpcConnectHist: prometheus.NewHistogram(prometheus.HistogramOpts{
+			Name:    "tezos_rpc_mempool_monitor_connection_connect_duration_milliseconds",
+			Help:    "Mempool monitor (re)connection duration (time until HTTP header arrives).",
+			Buckets: prometheus.ExponentialBuckets(250, 2, 10),
+		}),
+		chainID: chainID,
 	}
 
+	client := *service.Client
+	client.RPCStatusCallback = func(req *http.Request, status int, duration time.Duration, err error) {
+		c.rpcTotalHist.Observe(float64(duration / time.Millisecond))
+	}
+	client.RPCHeaderCallback = func(req *http.Request, resp *http.Response, duration time.Duration) {
+		c.rpcConnectHist.Observe(float64(duration / time.Millisecond))
+	}
+
+	srv := *service
+	srv.Client = &client
+	c.service = &srv
+
 	ctx, cancel := context.WithCancel(context.Background())
 	c.cancel = cancel
 
@@ -64,9 +87,24 @@ func NewMempoolOperationsCollectorCollector(service *tezos.Service, chainID stri
 		go c.listener(ctx, p)
 	}
 
-	return &c
+	return c
+}
+
+// Describe implements prometheus.Collector
+func (m *MempoolOperationsCollector) Describe(ch chan<- *prometheus.Desc) {
+	m.counter.Describe(ch)
+	m.rpcTotalHist.Describe(ch)
+	m.rpcConnectHist.Describe(ch)
+}
+
+// Collect implements prometheus.Collector
+func (m *MempoolOperationsCollector) Collect(ch chan<- prometheus.Metric) {
+	m.counter.Collect(ch)
+	m.rpcTotalHist.Collect(ch)
+	m.rpcConnectHist.Collect(ch)
 }
 
+// Shutdown stops all listeners
 func (m *MempoolOperationsCollector) Shutdown(ctx context.Context) error {
 	m.cancel()
 
diff --git a/collector/network.go b/collector/network.go
index 66889b7..1beea1d 100644
--- a/collector/network.go
+++ b/collector/network.go
@@ -84,6 +84,10 @@ func NewNetworkCollector(service *tezos.Service, timeout time.Duration, chainID
 func (c *NetworkCollector) Describe(ch chan<- *prometheus.Desc) {
 	ch <- sentBytesDesc
 	ch <- recvBytesDesc
+	ch <- connsDesc
+	ch <- peersDesc
+	ch <- pointsDesc
+	ch <- bootstrappedDesc
 }
 
 func getConnStats(ctx context.Context, service *tezos.Service) (map[string]map[string]int, error) {