diff --git a/auth.go b/auth.go
new file mode 100644
index 0000000..1ec522e
--- /dev/null
+++ b/auth.go
@@ -0,0 +1,23 @@
+package paypalsdk
+
+import (
+    "strings"
+    "net/url"
+    "errors"
+)
+
+// GetAuthorizationCodeURL returns URL where we need to redirect user
+// After signin in PayPal get authorization_code on redirectURI
+func (c *Client) GetAuthorizationCodeURL(redirectURI string, scopes []string) (string, error) {
+    if redirectURI == "" {
+        return "", errors.New("redirectURI cannot be empty")
+    }
+
+    if len(scopes) == 0 {
+        scopes = []string{"profile", "email"}
+    }
+
+    return c.APIBase + "/webapps/auth/protocol/openidconnect/v1/authorize?client_id=" +
+        url.QueryEscape(c.ClientID) + "&response_type=code&scope=" + strings.Join(scopes, "+") +
+        "&redirect_uri=" + url.QueryEscape(redirectURI), nil
+}
diff --git a/auth_test.go b/auth_test.go
new file mode 100644
index 0000000..418ae43
--- /dev/null
+++ b/auth_test.go
@@ -0,0 +1,24 @@
+package paypalsdk
+
+import (
+    "testing"
+)
+
+func TestGetAuthorizationCodeURL(t *testing.T) {
+    c, _ := NewClient("clid", "secret", APIBaseSandBox)
+
+    _, err := c.GetAuthorizationCodeURL("", []string{})
+    if err == nil {
+        t.Errorf("redirectURI is required in GetAuthorizationCodeURL")
+    }
+
+    uri, err := c.GetAuthorizationCodeURL("test", []string{})
+    if uri != "https://api.sandbox.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize?client_id=clid&response_type=code&scope=profile+email&redirect_uri=test" {
+        t.Errorf("GetAuthorizationCodeURL returns incorrect value for redirectURI=test")
+    }
+
+    uri, err = c.GetAuthorizationCodeURL("test", []string{"address"})
+    if uri != "https://api.sandbox.paypal.com/webapps/auth/protocol/openidconnect/v1/authorize?client_id=clid&response_type=code&scope=address&redirect_uri=test" {
+        t.Errorf("GetAuthorizationCodeURL returns incorrect value for redirectURI=test and scope=address")
+    }
+}
diff --git a/types.go b/types.go
index e0d04d8..400be7d 100644
--- a/types.go
+++ b/types.go
@@ -6,12 +6,13 @@ import (
     "fmt"
 )
 
+
 const (
     // APIBaseSandBox points to the sandbox (for testing) version of the API
-    APIBaseSandBox = "https://api.sandbox.paypal.com/v1"
+    APIBaseSandBox = "https://api.sandbox.paypal.com"
 
     // APIBaseLive points to the live version of the API
-    APIBaseLive = "https://api.paypal.com/v1"
+    APIBaseLive = "https://api.paypal.com"
 )
 
 type (