diff --git a/web/public/opensearch.xml b/web/public/opensearch.xml
new file mode 100644
index 0000000..7ac7bdd
--- /dev/null
+++ b/web/public/opensearch.xml
@@ -0,0 +1,9 @@
+<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/"
+                       xmlns:moz="http://www.mozilla.org/2006/browser/search/">
+  <ShortName>namae</ShortName>
+  <Description>Inter-platform name availability checker</Description>
+  <InputEncoding>UTF-8</InputEncoding>
+  <Image width="16" height="16" type="image/x-icon">[https://namae.dev/favicon.ico]</Image>
+  <Url type="text/html" template="https://namae.dev/s/{searchTerms}"></Url>
+  <moz:SearchForm>https://namae.dev</moz:SearchForm>
+</OpenSearchDescription>
diff --git a/web/src/App.tsx b/web/src/App.tsx
index 7ccaba9..6a94675 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -25,6 +25,14 @@ export default function App() {
   return (
     <>
       <GlobalStyle />
+      <Helmet>
+        <link
+          rel="search"
+          type="application/opensearchdescription+xml"
+          title="namae"
+          href="/opensearch.xml"
+        />
+      </Helmet>
       <Switch>
         <Route exact path="/">
           <Home />