diff --git a/packages/appview/src/api/oauth.ts b/packages/appview/src/api/oauth.ts
index 32bbad1..5e3571e 100644
--- a/packages/appview/src/api/oauth.ts
+++ b/packages/appview/src/api/oauth.ts
@@ -51,7 +51,10 @@ export const createRouter = (ctx: AppContext) => {
   router.post('/oauth/initiate', async (req, res) => {
     // Validate
     const handle = req.body?.handle
-    if (typeof handle !== 'string' || !isValidHandle(handle)) {
+    if (
+      typeof handle !== 'string' ||
+      !(isValidHandle(handle) || isValidUrl(handle))
+    ) {
       res.status(400).json({ error: 'Invalid handle' })
       return
     }
@@ -81,3 +84,17 @@ export const createRouter = (ctx: AppContext) => {
 
   return router
 }
+
+function isValidUrl(url: string): boolean {
+  try {
+    const urlp = new URL(url)
+    // http or https, no query params or path
+    return (
+      (urlp.protocol === 'http:' || urlp.protocol === 'https:') &&
+      !urlp.search &&
+      !urlp.pathname
+    )
+  } catch (error) {
+    return false
+  }
+}
diff --git a/packages/client/src/pages/LoginPage.tsx b/packages/client/src/pages/LoginPage.tsx
index 2974dc7..f3ccd96 100644
--- a/packages/client/src/pages/LoginPage.tsx
+++ b/packages/client/src/pages/LoginPage.tsx
@@ -63,7 +63,7 @@ const LoginPage = () => {
               htmlFor="handle"
               className="block mb-2 text-gray-700 dark:text-gray-300"
             >
-              Enter your Bluesky handle:
+              Enter your Bluesky handle or ATProto PDS:
             </label>
             <input
               id="handle"