diff --git a/.github/oasdiff-err-ignore.txt b/.github/oasdiff-err-ignore.txt
index 634506501bf3c2..dd6794a550adee 100644
--- a/.github/oasdiff-err-ignore.txt
+++ b/.github/oasdiff-err-ignore.txt
@@ -15,3 +15,8 @@ GET /v2/oauth-clients/{clientId}/webhooks/{webhookId} added the new path request
 DELETE /v2/teams/{teamId}/event-types/{eventTypeId}/webhooks/{webhookId} added the new path request parameter 'webhookId'
 GET /v2/teams/{teamId}/event-types/{eventTypeId}/webhooks/{webhookId} added the new path request parameter 'webhookId'
 GET /v2/webhooks/{webhookId} added the new path request parameter 'webhookId'
+GET /v2/calendars/busy-times added the new required 'query' request parameter 'calendarsToLoad'
+GET /v2/calendars/busy-times the 'query' request parameter 'dateFrom' became required
+GET /v2/calendars/busy-times the 'query' request parameter 'dateTo' became required
+GET /v2/calendars/busy-times deleted the 'query' request parameter 'credentialId'
+GET /v2/calendars/busy-times deleted the 'query' request parameter 'externalId'
diff --git a/apps/api/v2/src/ee/calendars/controllers/calendars.controller.ts b/apps/api/v2/src/ee/calendars/controllers/calendars.controller.ts
index 5e32ebf5335be6..827ac9f230918c 100644
--- a/apps/api/v2/src/ee/calendars/controllers/calendars.controller.ts
+++ b/apps/api/v2/src/ee/calendars/controllers/calendars.controller.ts
@@ -116,6 +116,23 @@ export class CalendarsController {
     description:
       "Get busy times from a calendar. Example request URL is `https://api.cal.com/v2/calendars/busy-times?timeZone=Europe%2FMadrid&dateFrom=2024-12-18&dateTo=2024-12-18&calendarsToLoad[0][credentialId]=135&calendarsToLoad[0][externalId]=skrauciz%40gmail.com`. Note: loggedInUsersTz is deprecated, use timeZone instead.",
   })
+  @ApiQuery({
+    name: "calendarsToLoad",
+    required: true,
+    description:
+      "An array of Calendar objects representing the calendars to be loaded. Use bracket notation in the URL, e.g.: calendarsToLoad[0][credentialId]=135&calendarsToLoad[0][externalId]=email@example.com",
+    schema: {
+      type: "array",
+      items: {
+        type: "object",
+        properties: {
+          credentialId: { type: "number", example: 135 },
+          externalId: { type: "string", example: "email@example.com" },
+        },
+        required: ["credentialId", "externalId"],
+      },
+    },
+  })
   async getBusyTimes(
     @Query() queryParams: CalendarBusyTimesInput,
     @GetUser() user: UserWithProfile
diff --git a/docs/api-reference/v2/openapi.json b/docs/api-reference/v2/openapi.json
index 007be244f68aa1..47722df504ae27 100644
--- a/docs/api-reference/v2/openapi.json
+++ b/docs/api-reference/v2/openapi.json
@@ -10499,7 +10499,7 @@
           },
           {
             "name": "dateFrom",
-            "required": false,
+            "required": true,
             "in": "query",
             "description": "The starting date for the busy times query",
             "schema": {
@@ -10509,7 +10509,7 @@
           },
           {
             "name": "dateTo",
-            "required": false,
+            "required": true,
             "in": "query",
             "description": "The ending date for the busy times query",
             "schema": {
@@ -10518,19 +10518,26 @@
             }
           },
           {
-            "name": "credentialId",
-            "in": "query",
+            "name": "calendarsToLoad",
             "required": true,
-            "schema": {
-              "type": "number"
-            }
-          },
-          {
-            "name": "externalId",
             "in": "query",
-            "required": true,
+            "description": "An array of Calendar objects representing the calendars to be loaded. Use bracket notation in the URL, e.g.: calendarsToLoad[0][credentialId]=135&calendarsToLoad[0][externalId]=email@example.com",
             "schema": {
-              "type": "string"
+              "type": "array",
+              "items": {
+                "type": "object",
+                "properties": {
+                  "credentialId": {
+                    "type": "number",
+                    "example": 135
+                  },
+                  "externalId": {
+                    "type": "string",
+                    "example": "email@example.com"
+                  }
+                },
+                "required": ["credentialId", "externalId"]
+              }
             }
           },
           {
diff --git a/packages/platform/types/calendars/inputs/busy-times.input.ts b/packages/platform/types/calendars/inputs/busy-times.input.ts
index d25b05da21f5ca..68417278082b2b 100644
--- a/packages/platform/types/calendars/inputs/busy-times.input.ts
+++ b/packages/platform/types/calendars/inputs/busy-times.input.ts
@@ -1,4 +1,4 @@
-import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
+import { ApiHideProperty, ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
 import { Transform, Type } from "class-transformer";
 import {
   IsArray,
@@ -41,11 +41,11 @@ function ValidateTimezoneRequired(
 export class Calendar {
   @Transform(({ value }: { value: string }) => value && parseInt(value, 10))
   @IsNumber()
-  @ApiProperty()
+  @ApiHideProperty()
   credentialId!: number;
 
   @IsString()
-  @ApiProperty()
+  @ApiHideProperty()
   externalId!: string;
 }
 
@@ -73,7 +73,6 @@ export class CalendarBusyTimesInput {
   timeZone?: string;
 
   @ApiProperty({
-    required: false,
     description: "The starting date for the busy times query",
     example: "2023-10-01",
   })
@@ -82,7 +81,6 @@ export class CalendarBusyTimesInput {
   dateFrom!: string;
 
   @ApiProperty({
-    required: false,
     description: "The ending date for the busy times query",
     example: "2023-10-31",
   })
@@ -90,12 +88,7 @@ export class CalendarBusyTimesInput {
   @IsDateString()
   dateTo!: string;
 
-  @ApiProperty({
-    type: [Calendar],
-    required: true,
-    description: "An array of Calendar objects representing the calendars to be loaded",
-    example: `[{ credentialId: "1", externalId: "AQgtJE7RnHEeyisVq2ENs2gAAAgEGAAAACgtJE7RnHEeyisVq2ENs2gAAAhSDAAAA" }, { credentialId: "2", externalId: "AQM7RnHEeyisVq2ENs2gAAAhFDBBBBB" }]`,
-  })
+  @ApiHideProperty()
   @IsArray()
   @ValidateNested({ each: true })
   @Type(() => Calendar)