diff --git a/01_infra_setup.md b/01_infra_setup.md
index 6ef0978..a8ba9c0 100644
--- a/01_infra_setup.md
+++ b/01_infra_setup.md
@@ -162,6 +162,12 @@ Note that, by applying these playbooks, both the root user and the `counterweigh
   ```bash
   cp ansible/infra_secrets.yml.example ansible/infra_secrets.yml
   ```
+  > **DEPRECATED (2026-09-11).** Uptime Kuma has been decommissioned. The server
+  > deployment was removed from this repo; what it monitored and how it was set up is
+  > preserved in [`archive/uptime_kuma/`](archive/uptime_kuma/). The monitoring blocks in
+  > the playbooks are kept but inert (`uptime_kuma_enabled: false`) so the check logic
+  > survives for whatever replaces it. The credentials below no longer exist in the vault.
+
 * Edit `ansible/infra_secrets.yml` and add your Uptime Kuma credentials:
   ```yaml
   uptime_kuma_username: "admin"
diff --git a/02_vps_core_services_setup.md b/02_vps_core_services_setup.md
index 19cd122..5d75de9 100644
--- a/02_vps_core_services_setup.md
+++ b/02_vps_core_services_setup.md
@@ -49,6 +49,12 @@ Checklist:
 
 ## Uptime Kuma
 
+> **DEPRECATED (2026-09-11).** Uptime Kuma has been decommissioned. The server
+> deployment was removed from this repo; what it monitored and how it was set up is
+> preserved in [`archive/uptime_kuma/`](archive/uptime_kuma/). The monitoring blocks in
+> the playbooks are kept but inert (`uptime_kuma_enabled: false`) so the check logic
+> survives for whatever replaces it. The credentials below no longer exist in the vault.
+
 Uptime Kuma gets used to monitor the availability of services, keep track of their uptime and notify issues.
 
 ### Deploy
diff --git a/README.md b/README.md
index 80dbaf6..89ef092 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Assumes that you've set `ansible/.vault_pass` with `chmod 600`.
   + Plan install
   + File based config
   + Crossbackup to Desky via rsync
-* Uptime Kuma
+* ~~Uptime Kuma~~ — decommissioned 2026-09-11, see `archive/uptime_kuma/`
   + Deployed on Vipy
   + Crossbackup to Desky via rsync
 * Vaultwarden
diff --git a/ansible/services/forgejo-runner/SETUP.md b/ansible/services/forgejo-runner/SETUP.md
index a66d295..5cb2a3f 100644
--- a/ansible/services/forgejo-runner/SETUP.md
+++ b/ansible/services/forgejo-runner/SETUP.md
@@ -25,4 +25,6 @@ ansible-playbook ansible/services/forgejo-runner/deploy_forgejo_runner_playbook.
 
 1. On the VM: `systemctl status forgejo-runner` should show active
 2. In Forgejo: **Site Administration** > **Actions** > **Runners** should show the runner as online
-3. In Uptime Kuma: the `forgejo-runner-healthcheck` push monitor should be receiving pings
+3. ~~In Uptime Kuma: the `forgejo-runner-healthcheck` push monitor should be receiving pings~~
+   *(Uptime Kuma was decommissioned 2026-09-11 — this check no longer applies. The
+   healthcheck timer still runs on the host but pushes nowhere. See `archive/uptime_kuma/`.)*