diff --git a/keyserver/src/responders/landing-handler.js b/keyserver/src/responders/landing-handler.js
--- a/keyserver/src/responders/landing-handler.js
+++ b/keyserver/src/responders/landing-handler.js
@@ -103,6 +103,7 @@
 const { renderToNodeStream } = ReactDOMServer;
 
 async function landingResponder(req: $Request, res: $Response) {
+  const siweNonce = req.header('siwe-nonce');
   const [{ jsURL, fontURLs, cssInclude }, LandingSSR] = await Promise.all([
     getAssetInfo(),
     getWebpackCompiledRootComponentForSSR(),
@@ -159,14 +160,20 @@
   const routerBasename = basePath.replace(/\/$/, '');
   const clientPath = routerBasename + req.url;
   const reactStream = renderToNodeStream(
-    <LandingSSR url={clientPath} basename={routerBasename} />,
+    <LandingSSR
+      url={clientPath}
+      basename={routerBasename}
+      siweNonce={siweNonce}
+    />,
   );
   reactStream.pipe(res, { end: false });
   await waitForStream(reactStream);
 
+  const siweNonceString = siweNonce ? `"${siweNonce}"` : 'null';
   // prettier-ignore
   res.end(html`</div>
         <script>var routerBasename = "${routerBasename}";</script>
+        <script>var siweNonce = ${siweNonceString};</script>
         <script src="${jsURL}"></script>
       </body>
     </html>
diff --git a/landing/landing-ssr.react.js b/landing/landing-ssr.react.js
--- a/landing/landing-ssr.react.js
+++ b/landing/landing-ssr.react.js
@@ -4,17 +4,28 @@
 import { StaticRouter } from 'react-router';
 
 import Landing from './landing.react';
+import { SIWENonceContext } from './siwe-nonce-context';
 
 export type LandingSSRProps = {
   +url: string,
   +basename: string,
+  +siweNonce: ?string,
 };
 function LandingSSR(props: LandingSSRProps): React.Node {
-  const { url, basename } = props;
+  const { url, basename, siweNonce } = props;
+
+  const siweNonceContextValue = React.useMemo(
+    () => ({
+      siweNonce,
+    }),
+    [siweNonce],
+  );
   const routerContext = React.useMemo(() => ({}), []);
   return (
     <StaticRouter location={url} basename={basename} context={routerContext}>
-      <Landing />
+      <SIWENonceContext.Provider value={siweNonceContextValue}>
+        <Landing />
+      </SIWENonceContext.Provider>
     </StaticRouter>
   );
 }
diff --git a/landing/root.js b/landing/root.js
--- a/landing/root.js
+++ b/landing/root.js
@@ -4,13 +4,23 @@
 import { BrowserRouter } from 'react-router-dom';
 
 import Landing from './landing.react';
+import { SIWENonceContext } from './siwe-nonce-context.js';
 
 declare var routerBasename: string;
+declare var siweNonce: ?string;
 
 function RootComponent(): React.Node {
+  const siweNonceContextValue = React.useMemo(
+    () => ({
+      siweNonce,
+    }),
+    [],
+  );
   return (
     <BrowserRouter basename={routerBasename}>
-      <Landing />
+      <SIWENonceContext.Provider value={siweNonceContextValue}>
+        <Landing />
+      </SIWENonceContext.Provider>
     </BrowserRouter>
   );
 }