diff --git a/handler.go b/handler.go
index c183f70a4..e3049f3df 100644
--- a/handler.go
+++ b/handler.go
@@ -1537,6 +1537,10 @@ func (h *Handler) handlePostDefinition(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		h.logger().Printf("problem sending CreateInputDefinition message: %s", err)
 	}
+
+	if err := json.NewEncoder(w).Encode(postInputDefinitionResponse{}); err != nil {
+		h.logger().Printf("response encoding error: %s", err)
+	}
 }
 
 func (h *Handler) handleGetDefinition(w http.ResponseWriter, r *http.Request) {
@@ -1599,3 +1603,5 @@ type InputDefinitionInfo struct {
 	Frames []InputFrame `json:"frames"`
 	Fields []Field      `json:"fields"`
 }
+
+type postInputDefinitionResponse struct{}
diff --git a/handler_test.go b/handler_test.go
index ab65894fb..8c7f3a7e2 100644
--- a/handler_test.go
+++ b/handler_test.go
@@ -1066,3 +1066,51 @@ func MustReadAll(r io.Reader) []byte {
 	}
 	return buf
 }
+
+// Ensure handler can delete a frame.
+func TestHandler_CreateInputDefinition(t *testing.T) {
+	hldr := MustOpenHolder()
+	defer hldr.Close()
+	hldr.MustCreateIndexIfNotExists("i0", pilosa.IndexOptions{})
+
+	h := NewHandler()
+	h.Holder = hldr.Holder
+	h.Cluster = NewCluster(1)
+	w := httptest.NewRecorder()
+	inputBody := []byte(`
+			{
+			"frames":[{
+				"name":"event-time",
+				"options":{
+					"timeQuantum": "YMD",
+					"inverseEnabled": false,
+					"cacheType": "ranked"
+				}
+			}],
+			"fields": [
+				{
+					"name": "id",
+					"primaryKey": true
+				},
+				{
+					"name": "cabType",
+					"actions": [
+						{
+							"frame": "cab-type",
+							"valueDestination": "mapping",
+							"valueMap": {
+								"Green": 1,
+								"Yellow": 2
+							}
+						}
+					]
+				}
+			]
+		}`)
+	h.ServeHTTP(w, MustNewHTTPRequest("POST", "/index/i0/input-definition/input1", bytes.NewBuffer(inputBody)))
+	if w.Code != http.StatusOK {
+		t.Fatalf("unexpected status code: %d", w.Code)
+	} else if body := w.Body.String(); body != `{}`+"\n" {
+		t.Fatalf("unexpected body: %s", body)
+	}
+}
diff --git a/index.go b/index.go
index b0ebc1c40..58bb8adaf 100644
--- a/index.go
+++ b/index.go
@@ -348,6 +348,16 @@ func (i *Index) Frame(name string) *Frame {
 	return i.frame(name)
 }
 
+// InputDefinition returns an input definition in the index by name.
+func (i *Index) InputDefinition(name string) *InputDefinition {
+	i.mu.Lock()
+	defer i.mu.Unlock()
+	if inputDef, ok := i.inputDefinitions[name]; ok {
+		return inputDef
+	}
+	return nil
+}
+
 func (i *Index) frame(name string) *Frame { return i.frames[name] }
 
 func (i *Index) inputDefinition(name string) *InputDefinition { return i.inputDefinitions[name] }
diff --git a/index_test.go b/index_test.go
index 43a064967..125be84c4 100644
--- a/index_test.go
+++ b/index_test.go
@@ -267,7 +267,7 @@ func TestIndex_CreateExistingInputDefinition(t *testing.T) {
 	frames := pilosa.InputFrame{Name: "f", Options: pilosa.FrameOptions{RowLabel: "row"}}
 	action := pilosa.Action{Frame: "f", ValueDestination: "map", ValueMap: map[string]uint64{"Green": 1}}
 	fields := pilosa.Field{Name: "id", PrimaryKey: true, Actions: []pilosa.Action{action}}
-	_ , err := index.CreateInputDefinition("test", []pilosa.InputFrame{frames}, []pilosa.Field{fields})
+	_, err := index.CreateInputDefinition("test", []pilosa.InputFrame{frames}, []pilosa.Field{fields})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -282,8 +282,32 @@ func TestIndex_CreateEmptyInputDefinition(t *testing.T) {
 	defer index.Close()
 
 	// Create Input Definition.
-	_ , err := index.CreateInputDefinition("test", []pilosa.InputFrame{}, []pilosa.Field{})
+	_, err := index.CreateInputDefinition("test", []pilosa.InputFrame{}, []pilosa.Field{})
 	if err.Error() != "frames and fields are required" {
 		t.Fatal(err)
 	}
 }
+
+func TestIndex_DeleteInputDefinition(t *testing.T) {
+	index := MustOpenIndex()
+	defer index.Close()
+
+	// Create Input Definition.
+	frames := pilosa.InputFrame{Name: "f", Options: pilosa.FrameOptions{RowLabel: "row"}}
+	action := pilosa.Action{Frame: "f", ValueDestination: "map", ValueMap: map[string]uint64{"Green": 1}}
+	fields := pilosa.Field{Name: "id", PrimaryKey: true, Actions: []pilosa.Action{action}}
+	_, err := index.CreateInputDefinition("test", []pilosa.InputFrame{frames}, []pilosa.Field{fields})
+	if err != nil {
+		t.Fatal(err)
+	} else if index.InputDefinition("test") == nil {
+		t.Fatal("No input definition created")
+	}
+
+	err = index.DeleteInputDefinition("test")
+	if err != nil {
+		t.Fatal(err)
+	} else if index.InputDefinition("test") != nil {
+		t.Fatal("input definition isn't deleted")
+	}
+
+}