diff --git a/.forgejo/workflows/spike-services.yml b/.forgejo/workflows/spike-services.yml
new file mode 100644
index 00000000..28339547
--- /dev/null
+++ b/.forgejo/workflows/spike-services.yml
@@ -0,0 +1,36 @@
+name: Spike — service postgres em porta própria
+
+on:
+  push:
+    branches: [OPS50-spike-services]
+
+jobs:
+  probe:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:17-alpine
+        env:
+          POSTGRES_USER: teqo
+          POSTGRES_PASSWORD: teqo
+          POSTGRES_DB: teqo_test
+        ports:
+          - 5433:5432
+        options: >-
+          --health-cmd "pg_isready -U teqo"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 12
+    steps:
+      - name: Probe TCP localhost:5433
+        run: |
+          set -euo pipefail
+          for i in $(seq 1 20); do
+            if (echo > /dev/tcp/localhost/5433) 2>/dev/null; then
+              echo "CONNECTED to localhost:5433"
+              exit 0
+            fi
+            sleep 2
+          done
+          echo "FAILED to reach localhost:5433"
+          exit 1