diff --git a/api_params/index.d.ts b/api_params/index.d.ts
index 287a89da82c1a24807eb0be08ac72bb4c9ca759e..ce9ada11869275b73b10296ee05a6463222cc403 100644
--- a/api_params/index.d.ts
+++ b/api_params/index.d.ts
@@ -46,6 +46,7 @@ export interface ApiParams {
     responselanginfo?: boolean;
     origin?: string;
     uselang?: string;
+    variant?: string;
     errorformat?: "bc" | "html" | "none" | "plaintext" | "raw" | "wikitext";
     errorlang?: string;
     errorsuselocal?: boolean;
@@ -433,17 +434,7 @@ export interface DiscussionToolsApiDiscussionToolsEditParams extends ApiParams {
     summary?: string;
     sectiontitle?: string;
     allownosectiontitle?: boolean;
-    useskin?:
-        | "apioutput"
-        | "cologneblue"
-        | "contenttranslation"
-        | "fallback"
-        | "minerva"
-        | "modern"
-        | "monobook"
-        | "timeless"
-        | "vector"
-        | "vector-2022";
+    useskin?: string;
     watchlist?: string;
     captchaid?: string;
     captchaword?: string;
@@ -477,17 +468,7 @@ export interface DiscussionToolsApiDiscussionToolsPreviewParams extends ApiParam
     page?: string;
     wikitext?: string;
     sectiontitle?: string;
-    useskin?:
-        | "apioutput"
-        | "cologneblue"
-        | "contenttranslation"
-        | "fallback"
-        | "minerva"
-        | "modern"
-        | "monobook"
-        | "timeless"
-        | "vector"
-        | "vector-2022";
+    useskin?: string;
     mobileformat?: boolean;
 }
 
@@ -910,17 +891,7 @@ export interface ApiImportParams extends ApiParams {
     summary?: string;
     xml?: upload;
     interwikiprefix?: string;
-    interwikisource?:
-        | "commons"
-        | "de"
-        | "es"
-        | "fr"
-        | "it"
-        | "meta"
-        | "nost"
-        | "outreachwiki"
-        | "pl"
-        | "test2wiki";
+    interwikisource?: string;
     interwikipage?: string;
     fullhistory?: boolean;
     templates?: boolean;
@@ -1352,17 +1323,7 @@ export interface ApiParseParams extends ApiParams {
     preview?: boolean;
     sectionpreview?: boolean;
     disabletoc?: boolean;
-    useskin?:
-        | "apioutput"
-        | "cologneblue"
-        | "contenttranslation"
-        | "fallback"
-        | "minerva"
-        | "modern"
-        | "monobook"
-        | "timeless"
-        | "vector"
-        | "vector-2022";
+    useskin?: string;
     contentformat?:
         | "application/json"
         | "application/octet-stream"
@@ -2759,17 +2720,7 @@ export interface VisualEditorApiVisualEditorEditParams extends ApiParams {
     returnto?: string;
     returntoquery?: string;
     returntoanchor?: string;
-    useskin?:
-        | "apioutput"
-        | "cologneblue"
-        | "contenttranslation"
-        | "fallback"
-        | "minerva"
-        | "modern"
-        | "monobook"
-        | "timeless"
-        | "vector"
-        | "vector-2022";
+    useskin?: string;
     tags?: string | string[];
     plugins?: string | string[];
     mobileformat?: boolean;
diff --git a/mw/Api.d.ts b/mw/Api.d.ts
index ffbe4d03f642e449eb2c14b1877121411c45cef2..5e417059a119d45964ab8f69707ac9c460d00750 100644
--- a/mw/Api.d.ts
+++ b/mw/Api.d.ts
@@ -1,4 +1,5 @@
 import {
+    ApiParams,
     ApiAssert,
     ApiEditPageParams,
     ApiLegacyTokenType,
@@ -16,7 +17,7 @@ type Tail<T extends any[]> = T extends [] ? T : T extends [any?, ...infer R] ? R
 type TypeOrArray<T> = T extends any ? T | T[] : never; // T[] would be a mixed array
 type ReplaceValue<T extends U | U[], U, V> = T extends U[] ? V[] : V;
 
-type UnknownApiParams = Record<string, string | number | boolean | string[] | number[] | undefined>;
+type UnknownApiParams = Record<string, string | number | boolean | string[] | number[] | undefined> | ApiParams;
 
 export type ApiResponse = Record<string, any>; // it will always be a JSON object, the rest is uncertain ...