diff --git a/backend/api/v1/modules/core/invites/routes.py b/backend/api/v1/modules/core/invites/routes.py
index a134440..3ed0883 100644
--- a/backend/api/v1/modules/core/invites/routes.py
+++ b/backend/api/v1/modules/core/invites/routes.py
@@ -37,13 +37,33 @@ async def create_invite(
         required_permissions=["user.create"],
     )
 
+    # tenant_slug: del token si viene; si el usuario es hub_admin (sin tenant en el
+    # token), se resuelve desde la compañía destino (a76.company → core.tenants).
     tenant_slug: str = current_user.get("tenant_slug") or ""
+    if not tenant_slug:
+        from sqlalchemy import text as _text
+        row = db.execute(
+            _text(
+                "SELECT t.slug FROM a76.company c "
+                "JOIN core.tenants t ON t.id = c.tenant_id WHERE c.id = :c"
+            ),
+            {"c": data.company_id},
+        ).first()
+        if row and row[0]:
+            tenant_slug = row[0]
+
     created_by: str = current_user.get("sub") or ""
 
+    # El invite se crea en el Hub: se necesita el token KC (la sesión local no la
+    # acepta el Hub). Se toma de la sesión (valkey) y se refresca si hace falta.
+    from core.hub_token import get_hub_access_token
+
+    kc_token = await get_hub_access_token(request)
+
     service = InviteService(db)
     return await service.create_invite(
         data=data,
         created_by=created_by,
         tenant_slug=tenant_slug,
-        user_access_token=credentials.credentials,
+        user_access_token=kc_token or credentials.credentials,
     )
diff --git a/frontend/src/routes/dashboard/users/+page.svelte b/frontend/src/routes/dashboard/users/+page.svelte
index ec059e8..67f14a9 100644
--- a/frontend/src/routes/dashboard/users/+page.svelte
+++ b/frontend/src/routes/dashboard/users/+page.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { onMount, onDestroy } from 'svelte';
-	import { Users, X } from '@lucide/svelte';
+	import { Users, X, UserPlus, Copy, Check } from '@lucide/svelte';
+	import { Button } from '$lib/components/ui/button';
 	import * as Card from '$lib/components/ui/card';
 	import { toast } from 'svelte-sonner';
 	import { companyStore } from '$lib/stores/company.svelte';
@@ -19,6 +20,13 @@
 	let loading = $state(true);
 	let busy = $state<string | null>(null);
 
+	// Alta de usuario por invitación
+	let inviteEmail = $state('');
+	let inviteRoleId = $state<number | null>(null);
+	let inviting = $state(false);
+	let inviteUrl = $state<string | null>(null);
+	let copied = $state(false);
+
 	// user_id → asignaciones de rol
 	const rolesByUser = $derived.by(() => {
 		const m: Record<string, UserRole[]> = {};
@@ -97,6 +105,44 @@
 			busy = null;
 		}
 	}
+
+	async function inviteUser() {
+		if (!companyId) return;
+		const email = inviteEmail.trim();
+		if (!email || !email.includes('@')) {
+			toast.error('Ingresa un email válido');
+			return;
+		}
+		if (!inviteRoleId) {
+			toast.error('Selecciona el rol del usuario');
+			return;
+		}
+		inviting = true;
+		inviteUrl = null;
+		try {
+			const res = await usersAPI.invite({ email, company_id: companyId, role_id: inviteRoleId });
+			toast.success('Invitación creada');
+			inviteUrl = res.invite_url ?? null;
+			inviteEmail = '';
+			await load();
+		} catch (e) {
+			toast.error(e instanceof Error ? e.message : 'No se pudo dar de alta el usuario');
+		} finally {
+			inviting = false;
+		}
+	}
+
+	async function copyInvite() {
+		if (!inviteUrl) return;
+		try {
+			await navigator.clipboard.writeText(inviteUrl);
+			copied = true;
+			toast.success('Enlace copiado');
+			setTimeout(() => (copied = false), 2000);
+		} catch {
+			toast.error('No se pudo copiar');
+		}
+	}
 </script>
 
 <div class="space-y-6">
@@ -112,6 +158,41 @@
 	{#if !companyId}
 		<Card.Root><Card.Content class="pt-6 text-sm text-muted-foreground">Selecciona una compañía activa.</Card.Content></Card.Root>
 	{:else}
+		<Card.Root>
+			<Card.Header>
+				<Card.Title class="flex items-center gap-2"><UserPlus class="h-4 w-4" /> Dar de alta usuario</Card.Title>
+				<Card.Description>Se envía una invitación por email; el usuario crea su contraseña y queda en la compañía con el rol elegido.</Card.Description>
+			</Card.Header>
+			<Card.Content>
+				<div class="grid gap-4 sm:grid-cols-3">
+					<label class="flex flex-col gap-1 text-sm sm:col-span-2">
+						<span class="font-medium">Email *</span>
+						<input type="email" class={inputCls} bind:value={inviteEmail} placeholder="persona@empresa.com" />
+					</label>
+					<label class="flex flex-col gap-1 text-sm">
+						<span class="font-medium">Rol *</span>
+						<select class={inputCls} bind:value={inviteRoleId}>
+							<option value={null} disabled>Selecciona…</option>
+							{#each roles as r (r.id)}<option value={r.id}>{r.name}</option>{/each}
+						</select>
+					</label>
+				</div>
+				<div class="mt-4 flex items-center justify-between gap-2">
+					{#if roles.length === 0}
+						<span class="text-xs text-muted-foreground">Primero crea roles en "Roles y permisos".</span>
+					{:else}<span></span>{/if}
+					<Button onclick={inviteUser} disabled={inviting || roles.length === 0}>{inviting ? 'Enviando…' : 'Invitar / dar de alta'}</Button>
+				</div>
+				{#if inviteUrl}
+					<div class="mt-3 flex items-center gap-2 rounded-md border bg-muted/40 p-2">
+						<span class="whitespace-nowrap text-xs text-muted-foreground">Si el correo no llega, comparte:</span>
+						<input class="flex-1 font-mono text-xs {inputCls}" readonly value={inviteUrl} />
+						<Button variant="outline" size="sm" onclick={copyInvite}>{#if copied}<Check class="h-4 w-4" />{:else}<Copy class="h-4 w-4" />{/if}</Button>
+					</div>
+				{/if}
+			</Card.Content>
+		</Card.Root>
+
 		<Card.Root>
 			<Card.Header>
 				<Card.Title>Usuarios ({users.length})</Card.Title>