diff --git a/.changeset/migrate-chat-reportMessage-to-openapi.md b/.changeset/migrate-chat-reportMessage-to-openapi.md
new file mode 100644
index 0000000000000..0fa9734b7e1d5
--- /dev/null
+++ b/.changeset/migrate-chat-reportMessage-to-openapi.md
@@ -0,0 +1,6 @@
+---
+'@rocket.chat/meteor': minor
+'@rocket.chat/rest-typings': minor
+---
+
+Migrated chat.reportMessage endpoint to new OpenAPI pattern with AJV validation
\ No newline at end of file
diff --git a/apps/meteor/app/api/server/v1/chat.ts b/apps/meteor/app/api/server/v1/chat.ts
index a00d57e46ae72..1aae3fe767a29 100644
--- a/apps/meteor/app/api/server/v1/chat.ts
+++ b/apps/meteor/app/api/server/v1/chat.ts
@@ -4,7 +4,6 @@ import { MessageTypes } from '@rocket.chat/message-types';
 import { Messages, Users, Rooms, Subscriptions } from '@rocket.chat/models';
 import {
 	ajv,
-	isChatReportMessageProps,
 	isChatGetURLPreviewProps,
 	isChatUpdateProps,
 	isChatGetThreadsListProps,
@@ -275,6 +274,23 @@ const isChatPinMessageProps = ajv.compile<ChatPinMessage>(ChatPinMessageSchema);
 
 const isChatUnpinMessageProps = ajv.compile<ChatUnpinMessage>(ChatUnpinMessageSchema);
 
+type ChatReportMessage = {
+	messageId: IMessage['_id'];
+	description: string;
+};
+
+const ChatReportMessageSchema = {
+	type: 'object',
+	properties: {
+		messageId: { type: 'string', minLength: 1 },
+		description: { type: 'string', minLength: 1 },
+	},
+	required: ['messageId', 'description'],
+	additionalProperties: false,
+};
+
+const isChatReportMessageLocalProps = ajv.compile<ChatReportMessage>(ChatReportMessageSchema);
+
 const chatEndpoints = API.v1
 	.post(
 		'chat.pinMessage',
@@ -419,6 +435,30 @@ const chatEndpoints = API.v1
 			});
 		},
 	)
+	.post(
+		'chat.reportMessage',
+		{
+			authRequired: true,
+			body: isChatReportMessageLocalProps,
+			response: {
+				200: ajv.compile<void>({
+					type: 'object',
+					properties: {
+						success: { type: 'boolean', enum: [true] },
+					},
+					required: ['success'],
+					additionalProperties: false,
+				}),
+				400: validateBadRequestErrorResponse,
+				401: validateUnauthorizedErrorResponse,
+			},
+		},
+		async function action() {
+			const { messageId, description } = this.bodyParams;
+			await reportMessage(messageId, description, this.userId);
+			return API.v1.success();
+		},
+	)
 	.post(
 		'chat.starMessage',
 		{
@@ -555,7 +595,6 @@ const chatEndpoints = API.v1
 			}
 
 			await unfollowMessage(this.user, { mid });
-
 			return API.v1.success();
 		},
 	);
@@ -677,27 +716,6 @@ API.v1.addRoute(
 	},
 );
 
-API.v1.addRoute(
-	'chat.reportMessage',
-	{ authRequired: true, validateParams: isChatReportMessageProps },
-	{
-		async post() {
-			const { messageId, description } = this.bodyParams;
-			if (!messageId) {
-				return API.v1.failure('The required "messageId" param is missing.');
-			}
-
-			if (!description) {
-				return API.v1.failure('The required "description" param is missing.');
-			}
-
-			await reportMessage(messageId, description, this.userId);
-
-			return API.v1.success();
-		},
-	},
-);
-
 API.v1.addRoute(
 	'chat.ignoreUser',
 	{ authRequired: true, validateParams: isChatIgnoreUserProps },
diff --git a/packages/rest-typings/src/v1/chat.ts b/packages/rest-typings/src/v1/chat.ts
index b52bba2d61ed5..b6072426a815e 100644
--- a/packages/rest-typings/src/v1/chat.ts
+++ b/packages/rest-typings/src/v1/chat.ts
@@ -125,27 +125,6 @@ const ChatGetDiscussionsSchema = {
 
 export const isChatGetDiscussionsProps = ajv.compile<ChatGetDiscussions>(ChatGetDiscussionsSchema);
 
-type ChatReportMessage = {
-	messageId: IMessage['_id'];
-	description: string;
-};
-
-const ChatReportMessageSchema = {
-	type: 'object',
-	properties: {
-		messageId: {
-			type: 'string',
-		},
-		description: {
-			type: 'string',
-		},
-	},
-	required: ['messageId', 'description'],
-	additionalProperties: false,
-};
-
-export const isChatReportMessageProps = ajv.compile<ChatReportMessage>(ChatReportMessageSchema);
-
 type ChatGetThreadsList = PaginatedRequest<{
 	rid: IRoom['_id'];
 	type?: 'unread' | 'following';
@@ -897,9 +876,6 @@ export type ChatEndpoints = {
 			message: IMessage;
 		};
 	};
-	'/v1/chat.reportMessage': {
-		POST: (params: ChatReportMessage) => void;
-	};
 	'/v1/chat.getDiscussions': {
 		GET: (params: ChatGetDiscussions) => {
 			messages: IMessage[];