diff --git a/v2/api/client.go b/v2/api/client.go
index b71a093..64121d2 100644
--- a/v2/api/client.go
+++ b/v2/api/client.go
@@ -249,11 +249,18 @@ func (c *Client) sendRequest(request *request) (*http.Response, error) {
 		log.Printf("[ERROR] Call to %s returned status %d. %s", keyfactorPath, resp.StatusCode, stringMessage)
 		return nil, errors.New(stringMessage)
 	} else if resp.StatusCode == http.StatusUnauthorized {
-		_, derr := httputil.DumpResponse(resp, true)
+		dmp, derr := httputil.DumpResponse(resp, true)
 		if derr != nil {
 			return nil, derr
 		}
-		err = errors.New("401 - Unauthorized: Access is denied due to invalid credentials")
+		//convert response to string
+		if dmp != nil {
+			respStr := string(dmp)
+			errMsg := fmt.Sprintf("http %d: %s", resp.StatusCode, respStr)
+			return nil, errors.New(errMsg)
+		}
+		errMsg := fmt.Sprintf("http %d: %s", resp.StatusCode, "Unauthorized: Access is denied due to invalid credentials")
+		err = errors.New(errMsg)
 		return nil, err
 	} else {
 		var errorMessage map[string]interface{} // Decode JSON body to handle issue
diff --git a/v2/api/client_models.go b/v2/api/client_models.go
index dcfdf07..fc9132c 100644
--- a/v2/api/client_models.go
+++ b/v2/api/client_models.go
@@ -3,29 +3,29 @@ package api
 // StringTuple is a struct holding two string elements used by the Keyfactor
 // Go Client library for data types requiring a tuple of strings
 type StringTuple struct {
-	Elem1 string
-	Elem2 string
+	Elem1 string `json:"elem1,omitempty"`
+	Elem2 string `json:"elem2,omitempty"`
 }
 
 // apiHeaders is a struct that holds an array of StringTuples used
 // to modularize the passing of custom API headers.
 type apiHeaders struct {
-	Headers []StringTuple
+	Headers []StringTuple `json:"headers,omitempty"`
 }
 
 // apiQuery is a struct that holds an array of StringTuples used
 // to modularize the passing of custom URL query parameters.
 type apiQuery struct {
-	Query []StringTuple
+	Query []StringTuple `json:"query,omitempty"`
 }
 
 // request is a structure that holds required information for communicating with
 // the Keyfactor API. Included inside this struct is a pointer to an APIHeaders struct, a payload as an
 // interface, and other configuration information for the API call.
 type request struct {
-	Method   string
-	Endpoint string
-	Headers  *apiHeaders
-	Query    *apiQuery
-	Payload  interface{}
+	Method   string      `json:"method"`
+	Endpoint string      `json:"endpoint"`
+	Headers  *apiHeaders `json:"headers,omitempty"`
+	Query    *apiQuery   `json:"query,omitempty"`
+	Payload  interface{} `json:"payload,omitempty"`
 }