diff --git a/config/service.go b/config/service.go
index 10f4c1f..81018a1 100644
--- a/config/service.go
+++ b/config/service.go
@@ -65,10 +65,10 @@ func (svc *Service) checkPattern() error {
 			braceName := matches[0][1]
 
 			// append
-			if svc.captures == nil {
-				svc.captures = make([]*braceCapture, 0)
+			if svc.Captures == nil {
+				svc.Captures = make([]*BraceCapture, 0)
 			}
-			svc.captures = append(svc.captures, &braceCapture{
+			svc.Captures = append(svc.Captures, &BraceCapture{
 				Index: i,
 				Name:  braceName,
 				Ref:   nil,
@@ -105,7 +105,7 @@ func (svc *Service) checkAndFormatInput(types []datatype.DataType) error {
 			braceName := matches[0][1]
 
 			found := false
-			for _, capture := range svc.captures {
+			for _, capture := range svc.Captures {
 				if capture.Name == braceName {
 					capture.Ref = param
 					found = true
diff --git a/config/types.go b/config/types.go
index fb292be..0c00f5d 100644
--- a/config/types.go
+++ b/config/types.go
@@ -24,7 +24,7 @@ type Service struct {
 	// Download    *bool                 `json:"download"`
 	// Output map[string]*Parameter `json:"out"`
 
-	captures []*braceCapture
+	Captures []*BraceCapture
 }
 
 // Parameter represents a parameter definition (from api.json)
@@ -39,8 +39,8 @@ type Parameter struct {
 	Validator datatype.Validator
 }
 
-// links to the related URI parameter
-type braceCapture struct {
+// BraceCapture links to the related URI parameter
+type BraceCapture struct {
 	Name  string
 	Index int
 	Ref   *Parameter
@@ -48,6 +48,6 @@ type braceCapture struct {
 
 // links to the related URI parameter and hold a value
 type braceCaptureValue struct {
-	braceCapture
+	BraceCapture
 	Value interface{}
 }