diff --git a/.env.example b/.env.example
index db21550..7d708ff 100644
--- a/.env.example
+++ b/.env.example
@@ -2,4 +2,4 @@ DATABASE_URL="postgres://drop:drop@127.0.0.1:5432/drop"
 
 GIANT_BOMB_API_KEY=""
 
-EXTERNAL_URL="localhost:3000"
+EXTERNAL_URL="http://localhost:3000"
diff --git a/package.json b/package.json
index 2fb2212..9444eeb 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "jdenticon": "^3.3.0",
     "luxon": "^3.6.1",
     "micromark": "^4.0.1",
+    "normalize-url": "^8.0.2",
     "nuxt": "^3.17.4",
     "nuxt-security": "2.2.0",
     "prisma": "^6.7.0",
diff --git a/pages/admin/users/auth/simple/index.vue b/pages/admin/users/auth/simple/index.vue
index 841cac9..4e52764 100644
--- a/pages/admin/users/auth/simple/index.vue
+++ b/pages/admin/users/auth/simple/index.vue
@@ -36,20 +36,14 @@
       </div>
       <ul role="list" class="divide-y divide-zinc-800">
         <li
-          v-for="(invitation, invitationIdx) in invitations"
+          v-for="invitation in invitations"
           :key="invitation.id"
           class="relative flex justify-between gap-x-6 py-5"
         >
           <div class="flex min-w-0 gap-x-4">
             <div class="min-w-0 flex-auto">
               <div class="text-sm/6 font-semibold text-zinc-100">
-                <p v-if="invitationUrls">
-                  {{ invitationUrls[invitationIdx] }}
-                </p>
-                <div
-                  v-else
-                  class="h-4 w-full bg-zinc-800 animate-pulse rounded"
-                />
+                <p>{{ invitation.inviteUrl }}</p>
               </div>
 
               <p class="mt-1 flex text-xs/5 text-gray-500">
@@ -415,20 +409,11 @@ useHead({
   title: "Simple authentication",
 });
 
-const data = await $dropFetch<Array<SerializeObject<Invitation>>>(
-  "/api/v1/admin/auth/invitation",
-);
+const data = await $dropFetch<
+  Array<SerializeObject<Invitation & { inviteUrl: string }>>
+>("/api/v1/admin/auth/invitation");
 const invitations = ref(data ?? []);
 
-const generateInvitationUrl = (id: string) =>
-  `${window.location.protocol}//${window.location.host}/auth/register?id=${id}`;
-const invitationUrls = ref<undefined | Array<string>>();
-onMounted(() => {
-  invitationUrls.value = invitations.value.map((invitation) =>
-    generateInvitationUrl(invitation.id),
-  );
-});
-
 // Makes username undefined if it's empty
 const _username = ref<undefined | string>(undefined);
 const username = computed({
@@ -515,7 +500,6 @@ function invite_wrapper() {
   invite()
     .then((invitation) => {
       invitations.value.push(invitation);
-      invitationUrls.value?.push(generateInvitationUrl(invitation.id));
     })
     .catch((response) => {
       const message = response.statusMessage || t("errors.unknown");
@@ -536,7 +520,6 @@ async function deleteInvitation(id: string) {
 
   const index = invitations.value.findIndex((e) => e.id === id);
   invitations.value.splice(index, 1);
-  invitationUrls.value?.splice(index, 1);
 }
 
 const createModalOpen = ref(false);
diff --git a/server/api/v1/admin/auth/invitation/index.get.ts b/server/api/v1/admin/auth/invitation/index.get.ts
index 469eaff..0724e49 100644
--- a/server/api/v1/admin/auth/invitation/index.get.ts
+++ b/server/api/v1/admin/auth/invitation/index.get.ts
@@ -1,4 +1,5 @@
 import aclManager from "~/server/internal/acls";
+import { systemConfig } from "~/server/internal/config/sys-conf";
 import prisma from "~/server/internal/db/database";
 import taskHandler from "~/server/internal/tasks";
 
@@ -10,6 +11,13 @@ export default defineEventHandler(async (h3) => {
 
   await taskHandler.runTaskGroupByName("cleanup:invitations");
 
+  const externalUrl = systemConfig.getExternalUrl();
   const invitations = await prisma.invitation.findMany({});
-  return invitations;
+
+  return invitations.map((invitation) => {
+    return {
+      ...invitation,
+      inviteUrl: `${externalUrl}/auth/register?id=${invitation.id}`,
+    };
+  });
 });
diff --git a/server/api/v1/admin/auth/invitation/index.post.ts b/server/api/v1/admin/auth/invitation/index.post.ts
index 9c0ea51..50696c2 100644
--- a/server/api/v1/admin/auth/invitation/index.post.ts
+++ b/server/api/v1/admin/auth/invitation/index.post.ts
@@ -2,6 +2,7 @@ import { readDropValidatedBody, throwingArktype } from "~/server/arktype";
 import aclManager from "~/server/internal/acls";
 import prisma from "~/server/internal/db/database";
 import { SharedRegisterValidator } from "../../../auth/signup/simple.post";
+import { systemConfig } from "~/server/internal/config/sys-conf";
 
 const CreateInvite = SharedRegisterValidator.partial()
   .and({
@@ -22,5 +23,8 @@ export default defineEventHandler(async (h3) => {
     data: body,
   });
 
-  return invitation;
+  return {
+    ...invitation,
+    inviteUrl: `${systemConfig.getExternalUrl()}/auth/register?id=${invitation.id}`,
+  };
 });
diff --git a/server/internal/config/sys-conf.ts b/server/internal/config/sys-conf.ts
index 8c8e637..70e0904 100644
--- a/server/internal/config/sys-conf.ts
+++ b/server/internal/config/sys-conf.ts
@@ -1,8 +1,13 @@
+import normalizeUrl from "normalize-url";
+
 class SystemConfig {
   private libraryFolder = process.env.LIBRARY ?? "./.data/library";
   private dataFolder = process.env.DATA ?? "./.data/data";
 
-  private externalUrl = process.env.EXTERNAL_URL ?? "http://localhost:3000";
+  private externalUrl = normalizeUrl(
+    process.env.EXTERNAL_URL ?? "http://localhost:3000",
+    { stripWWW: false },
+  );
   private dropVersion;
   private gitRef;
 
diff --git a/yarn.lock b/yarn.lock
index 6f4bdb9..120b1e8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6523,6 +6523,11 @@ normalize-range@^0.1.2:
   resolved "https://registry.yarnpkg.com/normalize-range/-/normalize-range-0.1.2.tgz#2d10c06bdfd312ea9777695a4d28439456b75942"
   integrity sha512-bdok/XvKII3nUpklnV6P2hxtMNrCboOjAcyBuQnWEhO665FwrSNRxU+AqpsyvO6LgGYPspN+lu5CLtw4jPRKNA==
 
+normalize-url@^8.0.2:
+  version "8.0.2"
+  resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-8.0.2.tgz#3b343a42f837e4dae2b01917c04e8de3782e9170"
+  integrity sha512-Ee/R3SyN4BuynXcnTaekmaVdbDAEiNrHqjQIA37mHU8G9pf7aaAD4ZX3XjBLo6rsdcxA/gtkcNYZLt30ACgynw==
+
 npm-run-path@^5.1.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-5.3.0.tgz#e23353d0ebb9317f174e93417e4a4d82d0249e9f"