diff --git a/src/app/api/campaigns/draft/route.ts b/src/app/api/campaigns/draft/route.ts
index cc330f9..c5b517b 100644
--- a/src/app/api/campaigns/draft/route.ts
+++ b/src/app/api/campaigns/draft/route.ts
@@ -1,6 +1,19 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getSupabaseServerClient } from '@/lib/supabase/server';
 
+// Erros do Supabase (PostgrestError) não são instâncias de Error — têm
+// message/code/details/hint. Sem isso, o catch caía no fallback genérico e
+// escondia a causa real (tabela ausente, projeto pausado, key inválida...).
+function describeError(error: unknown, fallback: string): string {
+  if (error instanceof Error) return error.message;
+  if (error && typeof error === 'object') {
+    const e = error as { message?: string; code?: string; details?: string; hint?: string };
+    const parts = [e.message, e.code ? `(code ${e.code})` : '', e.details, e.hint].filter(Boolean);
+    if (parts.length) return parts.join(' ');
+  }
+  return fallback;
+}
+
 const ALLOWED_FIELDS = [
   'product',
   'audience',
@@ -66,7 +79,7 @@ export async function POST(request: NextRequest) {
   } catch (error) {
     console.error('[Campaigns] Error saving draft:', error);
     return NextResponse.json(
-      { success: false, error: error instanceof Error ? error.message : 'Erro ao salvar rascunho da campanha.' },
+      { success: false, error: describeError(error, 'Erro ao salvar rascunho da campanha.') },
       { status: 500 }
     );
   }
@@ -86,7 +99,7 @@ export async function GET(request: NextRequest) {
   } catch (error) {
     console.error('[Campaigns] Error listing drafts:', error);
     return NextResponse.json(
-      { success: false, error: error instanceof Error ? error.message : 'Erro ao listar campanhas salvas.' },
+      { success: false, error: describeError(error, 'Erro ao listar campanhas salvas.') },
       { status: 500 }
     );
   }