diff --git a/librato.go b/librato.go
index 904c41e..b91b7af 100644
--- a/librato.go
+++ b/librato.go
@@ -12,6 +12,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"runtime"
 	"strings"
 	"time"
 
@@ -21,6 +22,10 @@ import (
 
 // ////////////////////////////////////////////////////////////////////////////////// //
 
+const VERSION = "1.0"
+
+// ////////////////////////////////////////////////////////////////////////////////// //
+
 // Measurement is interface for different type of measurements
 type Measurement interface {
 	Validate() error
@@ -214,6 +219,10 @@ var APIEndpoint = "https://metrics-api.librato.com"
 // List of sources
 var sources []DataSource
 
+// User agent
+var userAgent = fmt.Sprintf("ek-librato/%s (go; %s; %s-%s)",
+	VERSION, runtime.Version(), runtime.GOARCH, runtime.GOOS)
+
 // ////////////////////////////////////////////////////////////////////////////////// //
 
 // NewMetrics create new metrics struct for async metrics sending
@@ -469,6 +478,7 @@ func execRequest(method, url string, data interface{}) []error {
 		BasicAuthPassword: Token,
 
 		ContentType: "application/json",
+		UserAgent:   userAgent,
 	}
 
 	if data != nil {