diff --git a/.changeset/migrate-chat-ignoreUser-to-openapi.md b/.changeset/migrate-chat-ignoreUser-to-openapi.md
new file mode 100644
index 0000000000000..8170437ecf97a
--- /dev/null
+++ b/.changeset/migrate-chat-ignoreUser-to-openapi.md
@@ -0,0 +1,6 @@
+---
+'@rocket.chat/meteor': minor
+'@rocket.chat/rest-typings': minor
+---
+
+Migrated chat.ignoreUser endpoint to new OpenAPI pattern with AJV validation
diff --git a/apps/meteor/app/api/server/v1/chat.ts b/apps/meteor/app/api/server/v1/chat.ts
index a00d57e46ae72..1e4d4bfa3cc52 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,
@@ -14,7 +13,6 @@ import {
 	isChatPostMessageProps,
 	isChatSearchProps,
 	isChatSendMessageProps,
-	isChatIgnoreUserProps,
 	isChatGetPinnedMessagesProps,
 	isChatGetMentionedMessagesProps,
 	isChatReactProps,
@@ -275,6 +273,51 @@ 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);
+
+type ChatIgnoreUser = {
+	rid: string;
+	userId: string;
+	ignore?: 'true' | 'false' | '1' | '0';
+};
+
+const ChatIgnoreUserSchema = {
+	type: 'object',
+	properties: {
+		rid: {
+			type: 'string',
+			minLength: 1,
+		},
+		userId: {
+			type: 'string',
+			minLength: 1,
+		},
+		ignore: {
+			type: 'string',
+			enum: ['true', 'false', '1', '0'],
+		},
+	},
+	required: ['rid', 'userId'],
+	additionalProperties: false,
+};
+
+export const isChatIgnoreUserLocalProps = ajv.compile<ChatIgnoreUser>(ChatIgnoreUserSchema);
+
 const chatEndpoints = API.v1
 	.post(
 		'chat.pinMessage',
@@ -419,6 +462,30 @@ 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',
 		{
@@ -555,6 +622,32 @@ const chatEndpoints = API.v1
 			}
 
 			await unfollowMessage(this.user, { mid });
+			return API.v1.success();
+		},
+	)
+	.get(
+		'chat.ignoreUser',
+		{
+			authRequired: true,
+			query: isChatIgnoreUserLocalProps,
+			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 { rid, userId } = this.queryParams;
+			const { ignore = 'true' } = this.queryParams;
+
+			const ignoreBool = ignore === 'true' || ignore === '1';
+
+			await ignoreUser(this.userId, { rid, userId, ignore: ignoreBool });
 
 			return API.v1.success();
 		},
@@ -677,52 +770,6 @@ 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 },
-	{
-		async get() {
-			const { rid, userId } = this.queryParams;
-			let { ignore = true } = this.queryParams;
-
-			ignore = typeof ignore === 'string' ? /true|1/.test(ignore) : ignore;
-
-			if (!rid?.trim()) {
-				throw new Meteor.Error('error-room-id-param-not-provided', 'The required "rid" param is missing.');
-			}
-
-			if (!userId?.trim()) {
-				throw new Meteor.Error('error-user-id-param-not-provided', 'The required "userId" param is missing.');
-			}
-
-			await ignoreUser(this.userId, { rid, userId, ignore });
-
-			return API.v1.success();
-		},
-	},
-);
-
 API.v1.addRoute(
 	'chat.getDeletedMessages',
 	{ authRequired: true, validateParams: isChatGetDeletedMessagesProps },
diff --git a/packages/rest-typings/src/v1/chat.ts b/packages/rest-typings/src/v1/chat.ts
index b52bba2d61ed5..570a3fd27cd05 100644
--- a/packages/rest-typings/src/v1/chat.ts
+++ b/packages/rest-typings/src/v1/chat.ts
@@ -291,38 +291,6 @@ const ChatReactSchema = {
 
 export const isChatReactProps = ajv.compile<ChatReact>(ChatReactSchema);
 
-/**
- * The param `ignore` cannot be boolean, since this is a GET method. Use strings 'true' or 'false' instead.
- * @param {string} ignore
- */
-type ChatIgnoreUser = {
-	rid: string;
-	userId: string;
-	ignore: string;
-};
-
-const ChatIgnoreUserSchema = {
-	type: 'object',
-	properties: {
-		rid: {
-			type: 'string',
-			minLength: 1,
-		},
-		userId: {
-			type: 'string',
-			minLength: 1,
-		},
-		ignore: {
-			type: 'string',
-			minLength: 1,
-		},
-	},
-	required: ['rid', 'userId', 'ignore'],
-	additionalProperties: false,
-};
-
-export const isChatIgnoreUserProps = ajv.compile<ChatIgnoreUser>(ChatIgnoreUserSchema);
-
 type ChatSearch = PaginatedRequest<{
 	roomId: IRoom['_id'];
 	searchText: string;
@@ -930,9 +898,6 @@ export type ChatEndpoints = {
 	'/v1/chat.react': {
 		POST: (params: ChatReact) => void;
 	};
-	'/v1/chat.ignoreUser': {
-		GET: (params: ChatIgnoreUser) => void;
-	};
 	'/v1/chat.search': {
 		GET: (params: ChatSearch) => {
 			messages: IMessage[];