diff --git a/src/api/resources/openApi.json b/src/api/resources/openApi.json
index e0f69ed49..220fd3c43 100644
--- a/src/api/resources/openApi.json
+++ b/src/api/resources/openApi.json
@@ -475,16 +475,14 @@
           "type": {
             "type": "string",
             "description": "Source type of map data.",
-            "enum": ["tilejson", "wms", "wmts"],
-            "default": "wms",
-            "example": "wms"
+            "enum": ["tilejson", "WMS", "WMTS", "mapboxstyle", "S-57"],
+            "example": "WMTS"
           }
         }
       },
       "Chart": {
         "description": "Signal K Chart resource",
         "type": "object",
-        "required": ["identifier"],
         "properties": {
           "identifier": {
             "type": "string",
@@ -1399,6 +1397,29 @@
             }
           }
         }
+      },
+      "post": {
+        "tags": ["charts"],
+        "summary": "Add a new Chart source",
+        "requestBody": {
+          "description": "Chart resource entry",
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/Chart"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "$ref": "#/components/responses/200ActionResponse"
+          },
+          "default": {
+            "$ref": "#/components/responses/ErrorResponse"
+          }
+        }
       }
     },
     "/resources/charts/{id}": {
@@ -1418,7 +1439,7 @@
       ],
       "get": {
         "tags": ["charts"],
-        "summary": "Retrieve chart with supplied id",
+        "summary": "Retrieve chart metadata for the supplied id",
         "responses": {
           "200": {
             "$ref": "#/components/responses/ChartResponse"
@@ -1430,7 +1451,7 @@
       },
       "put": {
         "tags": ["charts"],
-        "summary": "Add / update a new Chart with supplied id",
+        "summary": "Add / update a new Chart source with supplied id",
         "requestBody": {
           "description": "Chart resource entry",
           "required": true,
@@ -1450,6 +1471,18 @@
             "$ref": "#/components/responses/ErrorResponse"
           }
         }
+      },
+      "delete": {
+        "tags": ["charts"],
+        "summary": "Remove Chart source with supplied id",
+        "responses": {
+          "200": {
+            "$ref": "#/components/responses/200ActionResponse"
+          },
+          "default": {
+            "$ref": "#/components/responses/ErrorResponse"
+          }
+        }
       }
     }
   }