diff --git a/src/core/config/defaults.js b/src/core/config/defaults.js
index bee47f04cdd..8fe7a53a629 100644
--- a/src/core/config/defaults.js
+++ b/src/core/config/defaults.js
@@ -23,7 +23,10 @@ const defaultOptions = Object.freeze({
   displayRequestDuration: false,
   deepLinking: false,
   tryItOutEnabled: false,
-  requestInterceptor: (a) => a,
+  requestInterceptor: (request) => {
+    request.curlOptions = []
+    return request
+  },
   responseInterceptor: (a) => a,
   showMutatedRequest: true,
   defaultModelRendering: "example",
@@ -80,6 +83,11 @@ const defaultOptions = Object.freeze({
     activated: true,
     theme: "agate",
   },
+  operationsSorter: null,
+  tagsSorter: null,
+  onComplete: null,
+  modelPropertyMacro: null,
+  parameterMacro: null,
 })
 
 export default defaultOptions
diff --git a/src/core/config/type-cast/mappings.js b/src/core/config/type-cast/mappings.js
index b085f5ec8ce..b025fb1295e 100644
--- a/src/core/config/type-cast/mappings.js
+++ b/src/core/config/type-cast/mappings.js
@@ -5,16 +5,21 @@ import arrayTypeCaster from "./type-casters/array"
 import booleanTypeCaster from "./type-casters/boolean"
 import domNodeTypeCaster from "./type-casters/dom-node"
 import filterTypeCaster from "./type-casters/filter"
+import functionTypeCaster from "./type-casters/function"
 import nullableArrayTypeCaster from "./type-casters/nullable-array"
+import nullableFunctionTypeCaster from "./type-casters/nullable-function"
 import nullableStringTypeCaster from "./type-casters/nullable-string"
 import numberTypeCaster from "./type-casters/number"
 import objectTypeCaster from "./type-casters/object"
+import sorterTypeCaster from "./type-casters/sorter"
 import stringTypeCaster from "./type-casters/string"
 import syntaxHighlightTypeCaster from "./type-casters/syntax-highlight"
 import undefinedStringTypeCaster from "./type-casters/undefined-string"
 import defaultOptions from "../defaults"
 
 const mappings = {
+  components: { typeCaster: objectTypeCaster },
+  configs: { typeCaster: objectTypeCaster },
   configUrl: { typeCaster: nullableStringTypeCaster },
   deepLinking: {
     typeCaster: booleanTypeCaster,
@@ -41,12 +46,20 @@ const mappings = {
   dom_id: { typeCaster: nullableStringTypeCaster },
   domNode: { typeCaster: domNodeTypeCaster },
   filter: { typeCaster: filterTypeCaster },
+  fn: { typeCaster: objectTypeCaster },
+  initialState: { typeCaster: objectTypeCaster },
   layout: { typeCaster: stringTypeCaster },
   maxDisplayedTags: {
     typeCaster: numberTypeCaster,
     defaultValue: defaultOptions.maxDisplayedTags,
   },
+  modelPropertyMacro: { typeCaster: nullableFunctionTypeCaster },
   oauth2RedirectUrl: { typeCaster: undefinedStringTypeCaster },
+  onComplete: { typeCaster: nullableFunctionTypeCaster },
+  operationsSorter: {
+    typeCaster: sorterTypeCaster,
+  },
+  paramaterMacro: { typeCaster: nullableFunctionTypeCaster },
   persistAuthorization: {
     typeCaster: booleanTypeCaster,
     defaultValue: defaultOptions.persistAuthorization,
@@ -59,6 +72,10 @@ const mappings = {
     typeCaster: arrayTypeCaster,
     defaultValue: defaultOptions.presets,
   },
+  requestInterceptor: {
+    typeCaster: functionTypeCaster,
+    defaultValue: defaultOptions.requestInterceptor,
+  },
   requestSnippets: {
     typeCaster: objectTypeCaster,
     defaultValue: defaultOptions.requestSnippets,
@@ -67,6 +84,10 @@ const mappings = {
     typeCaster: booleanTypeCaster,
     defaultValue: defaultOptions.requestSnippetsEnabled,
   },
+  responseInterceptor: {
+    typeCaster: functionTypeCaster,
+    defaultValue: defaultOptions.responseInterceptor,
+  },
   showCommonExtensions: {
     typeCaster: booleanTypeCaster,
     defaultValue: defaultOptions.showCommonExtensions,
@@ -93,6 +114,9 @@ const mappings = {
     defaultValue: defaultOptions.syntaxHighlight.activated,
   },
   "syntaxHighlight.theme": { typeCaster: stringTypeCaster },
+  tagsSorter: {
+    typeCaster: sorterTypeCaster,
+  },
   tryItOutEnabled: {
     typeCaster: booleanTypeCaster,
     defaultValue: defaultOptions.tryItOutEnabled,
diff --git a/src/core/config/type-cast/type-casters/function.js b/src/core/config/type-cast/type-casters/function.js
new file mode 100644
index 00000000000..35ace3cfaa5
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/function.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const functionTypeCaster = (value, defaultValue) =>
+  typeof value === "function" ? value : defaultValue
+
+export default functionTypeCaster
diff --git a/src/core/config/type-cast/type-casters/nullable-function.js b/src/core/config/type-cast/type-casters/nullable-function.js
new file mode 100644
index 00000000000..23832ae1204
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/nullable-function.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const nullableFunctionTypeCaster = (value) =>
+  typeof value === "function" ? value : null
+
+export default nullableFunctionTypeCaster
diff --git a/src/core/config/type-cast/type-casters/sorter.js b/src/core/config/type-cast/type-casters/sorter.js
new file mode 100644
index 00000000000..5773a7172ef
--- /dev/null
+++ b/src/core/config/type-cast/type-casters/sorter.js
@@ -0,0 +1,7 @@
+/**
+ * @prettier
+ */
+const sorterTypeCaster = (value) =>
+  typeof value === "function" || typeof value === "string" ? value : null
+
+export default sorterTypeCaster
diff --git a/src/core/plugins/request-snippets/fn.js b/src/core/plugins/request-snippets/fn.js
index 8fe7f539ccd..4e71454cc6c 100644
--- a/src/core/plugins/request-snippets/fn.js
+++ b/src/core/plugins/request-snippets/fn.js
@@ -1,4 +1,4 @@
-import { Map } from "immutable"
+import { List, Map } from "immutable"
 import win from "../../window"
 
 
@@ -83,7 +83,8 @@ const curlify = (request, escape, newLine, ext = "") => {
   let headers = request.get("headers")
   curlified += "curl" + ext
 
-  if (request.has("curlOptions")) {
+  const curlOptions = request.get("curlOptions")
+  if (List.isList(curlOptions) && !curlOptions.isEmpty()) {
     addWords(...request.get("curlOptions"))
   }