diff --git a/packages/backend/src/server/web/index.ts b/packages/backend/src/server/web/index.ts
index 727bbc9..2b3f0ce 100644
--- a/packages/backend/src/server/web/index.ts
+++ b/packages/backend/src/server/web/index.ts
@@ -304,6 +304,24 @@ export class ClientServerService {
 			return await reply.sendFile('/robots.txt', staticAssets);
 		});
 
+		// OpenSearch XML
+		fastify.get('/opensearch.xml', async (request, reply) => {
+			const meta = await this.metaService.fetch();
+
+			const name = meta.name || "Misskey";
+			let content = "";
+			content += `<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">`;
+			content += `<ShortName>${name} Search</ShortName>`;
+			content += `<Description>${name} Search</Description>`;
+			content += `<InputEncoding>UTF-8</InputEncoding>`;
+			content += `<Image width="16" height="16" type="image/x-icon">${this.config.url}/favicon.ico</Image>`;
+			content += `<Url type="text/html" template="${this.config.url}/search?q={searchTerms}"/>`;
+			content += `</OpenSearchDescription>`;
+
+			reply.header('Content-Type', 'application/opensearchdescription+xml');
+			return await reply.send(content);
+		});
+
 		//#endregion
 
 		const renderBase = async (reply: FastifyReply) => {
@@ -313,6 +331,7 @@ export class ClientServerService {
 				img: meta.bannerUrl,
 				title: meta.name ?? 'Misskey',
 				instanceName: meta.name ?? 'Misskey',
+				url: this.config.url,
 				desc: meta.description,
 				icon: meta.iconUrl,
 				themeColor: meta.themeColor,
diff --git a/packages/backend/src/server/web/views/base.pug b/packages/backend/src/server/web/views/base.pug
index 0c3c5c9..b472cff 100644
--- a/packages/backend/src/server/web/views/base.pug
+++ b/packages/backend/src/server/web/views/base.pug
@@ -31,6 +31,7 @@ html
 		link(rel='icon' href= icon || '/favicon.ico')
 		link(rel='apple-touch-icon' href= icon || '/apple-touch-icon.png')
 		link(rel='manifest' href='/manifest.json')
+		link(rel='search' type='application/opensearchdescription+xml' title=((title || "Misskey") + " Search") href=`${url}/opensearch.xml`)
 		link(rel='prefetch' href='https://xn--931a.moe/assets/info.jpg')
 		link(rel='prefetch' href='https://xn--931a.moe/assets/not-found.jpg')
 		link(rel='prefetch' href='https://xn--931a.moe/assets/error.jpg')
diff --git a/packages/client/src/pages/search.vue b/packages/client/src/pages/search.vue
index c080b76..f9aac2d 100644
--- a/packages/client/src/pages/search.vue
+++ b/packages/client/src/pages/search.vue
@@ -12,12 +12,34 @@ import { computed } from 'vue';
 import XNotes from '@/components/MkNotes.vue';
 import { i18n } from '@/i18n';
 import { definePageMetadata } from '@/scripts/page-metadata';
+import * as os from '@/os';
+import { mainRouter } from '@/router';
 
 const props = defineProps<{
 	query: string;
 	channel?: string;
 }>();
 
+const query = props.query;
+
+if (localStorage.getItem('account') != null) {
+	if (query.startsWith('https://') || (query.startsWith('@') && !query.includes(' '))) {
+		const promise = os.api('ap/show', {
+			uri: props.query,
+		});
+
+		os.promiseDialog(promise, null, null, i18n.ts.fetchingAsApObject);
+
+		const res = await promise;
+
+		if (res.type === 'User') {
+			mainRouter.replace(`/@${res.object.username}@${res.object.host}`);
+		} else if (res.type === 'Note') {
+			mainRouter.replace(`/notes/${res.object.id}`);
+		}
+	}
+}
+
 const pagination = {
 	endpoint: 'notes/search' as const,
 	limit: 10,