diff --git a/apps/meteor/app/api/server/api.ts b/apps/meteor/app/api/server/api.ts
index b603274ab85..2898624f191 100644
--- a/apps/meteor/app/api/server/api.ts
+++ b/apps/meteor/app/api/server/api.ts
@@ -88,7 +88,7 @@ interface IAPIDefaultFieldsToExclude {
 	inviteToken: number;
 }
 
-type RateLimiterOptions = {
+export type RateLimiterOptions = {
 	numRequestsAllowed?: number;
 	intervalTimeInMS?: number;
 };
@@ -320,6 +320,16 @@ export class APIClass<
 		};
 	}
 
+	public unavailableResult<T>(msg?: T): InternalError<T, 503, 'Service unavailable'> {
+		return {
+			statusCode: 503,
+			body: {
+				success: false,
+				error: msg || 'Service unavailable',
+			},
+		};
+	}
+
 	public unauthorized<T>(msg?: T): UnauthorizedResult<T> {
 		return {
 			statusCode: 401,
@@ -421,7 +431,7 @@ export class APIClass<
 	}: {
 		routes: string[];
 		rateLimiterOptions: RateLimiterOptions | boolean;
-		endpoints: string[];
+		endpoints: Record<string, string> | string[];
 	}): void {
 		if (typeof rateLimiterOptions !== 'object') {
 			throw new Meteor.Error('"rateLimiterOptions" must be an object');
diff --git a/apps/meteor/app/api/server/definition.ts b/apps/meteor/app/api/server/definition.ts
index d2da73d500d..25ae81f08ed 100644
--- a/apps/meteor/app/api/server/definition.ts
+++ b/apps/meteor/app/api/server/definition.ts
@@ -55,10 +55,10 @@ export type ForbiddenResult<T> = {
 	};
 };
 
-export type InternalError<T, StatusCode = 500> = {
+export type InternalError<T, StatusCode extends ErrorStatusCodes = 500, D = 'Internal server error'> = {
 	statusCode: StatusCode;
 	body: {
-		error: T | 'Internal server error';
+		error: T | D;
 		success: false;
 	};
 };
@@ -311,7 +311,8 @@ type Results<TResponse extends TypedOptions['response']> = {
 	headers?: Record<string, string>;
 };
 
-export type TypedAction<TOptions extends TypedOptions, TPath extends string = ''> = (
-	this: TypedThis<TOptions, TPath>,
-	request: Request,
-) => PromiseOrValue<Results<TOptions['response']>>;
+export type TypedAction<
+	TOptions extends TypedOptions,
+	TPath extends string = '',
+	TThis extends TypedThis<TOptions, TPath> = TypedThis<TOptions, TPath>,
+> = (this: TThis, request: Request) => PromiseOrValue<Results<TOptions['response']>>;