diff --git a/apps-gx10/fc-devicemgmt/README.md b/apps-gx10/fc-devicemgmt/README.md
index ebcfe17..598197c 100644
--- a/apps-gx10/fc-devicemgmt/README.md
+++ b/apps-gx10/fc-devicemgmt/README.md
@@ -13,6 +13,8 @@ values to clear readiness checks.
 
 | Key | Purpose |
 | --- | --- |
+| `DEVICE_MANAGEMENT_OPERATOR_API_KEY` | Required operator API key for authenticated REST/MCP write operations, including Android command queueing. |
+| `DEVICE_MANAGEMENT_ADMIN_API_KEY` | Required admin API key for privileged DeviceManagement operations. |
 | `NANOHUB_API_KEY` | NanoHUB API password for HTTP Basic user `nanohub`. |
 | `APPLE_MDM_APNS_TOPIC` | MDM APNs topic returned after uploading the Apple MDM push certificate to NanoHUB/NanoMDM. |
 | `APPLE_MDM_SCEP_URL` | Live SCEP URL included in the enrollment profile. |
@@ -27,6 +29,13 @@ Non-secret profile constants stay in GitOps: NanoHUB base URL, MDM server URL,
 check-in URL, organization/display names, the HTTPS trust anchor certificate,
 managed Wi-Fi encryption type, auto-join, and MAC-randomization disablement.
 
+DeviceManagement auth is enabled on GX10. The deployment maps
+`DEVICE_MANAGEMENT_OPERATOR_API_KEY` to both `Auth__ApiKey` and
+`FlowerCore__Auth__ApiKey`; the unprefixed key keeps the MCP API key post-config
+path aligned with REST auth. Agent enrollment, heartbeat, inventory, command poll,
+and command-result callbacks remain on the unauthenticated agent channel by
+application policy; operator write endpoints must use `X-Api-Key`.
+
 ## Readiness Check
 
 After changing the runtime secret and letting the pod roll, verify:
diff --git a/apps-gx10/fc-devicemgmt/deployment-fc-devicemgmt-web.json b/apps-gx10/fc-devicemgmt/deployment-fc-devicemgmt-web.json
index bae6751..47d9987 100644
--- a/apps-gx10/fc-devicemgmt/deployment-fc-devicemgmt-web.json
+++ b/apps-gx10/fc-devicemgmt/deployment-fc-devicemgmt-web.json
@@ -88,15 +88,55 @@
                 "name": "FlowerCore__Database__ConnectionStrings__Sqlite",
                 "value": "Data Source=/data/devicemgmt.db"
               },
-              {
-                "name": "FlowerCore__Database__Password",
-                "valueFrom": {
-                  "secretKeyRef": {
-                    "key": "DB-Password",
-                    "name": "fc-devicemgmt-runtime"
-                  }
-                }
-              },
+              {
+                "name": "FlowerCore__Database__Password",
+                "valueFrom": {
+                  "secretKeyRef": {
+                    "key": "DB-Password",
+                    "name": "fc-devicemgmt-runtime"
+                  }
+                }
+              },
+              {
+                "name": "FlowerCore__Auth__Enabled",
+                "value": "true"
+              },
+              {
+                "name": "Auth__ApiKey",
+                "valueFrom": {
+                  "secretKeyRef": {
+                    "key": "DEVICE_MANAGEMENT_OPERATOR_API_KEY",
+                    "name": "fc-devicemgmt-runtime"
+                  }
+                }
+              },
+              {
+                "name": "FlowerCore__Auth__ApiKey",
+                "valueFrom": {
+                  "secretKeyRef": {
+                    "key": "DEVICE_MANAGEMENT_OPERATOR_API_KEY",
+                    "name": "fc-devicemgmt-runtime"
+                  }
+                }
+              },
+              {
+                "name": "Auth__AdminApiKey",
+                "valueFrom": {
+                  "secretKeyRef": {
+                    "key": "DEVICE_MANAGEMENT_ADMIN_API_KEY",
+                    "name": "fc-devicemgmt-runtime"
+                  }
+                }
+              },
+              {
+                "name": "FlowerCore__Auth__AdminApiKey",
+                "valueFrom": {
+                  "secretKeyRef": {
+                    "key": "DEVICE_MANAGEMENT_ADMIN_API_KEY",
+                    "name": "fc-devicemgmt-runtime"
+                  }
+                }
+              },
               {
                 "name": "FlowerCore__EventBus__Redis__Configuration",
                 "value": "redis.fc-redis.svc:6379"
diff --git a/tests/bluejay-infra-lint/FleetManifestLintTests.cs b/tests/bluejay-infra-lint/FleetManifestLintTests.cs
index a4125fa..f652257 100644
--- a/tests/bluejay-infra-lint/FleetManifestLintTests.cs
+++ b/tests/bluejay-infra-lint/FleetManifestLintTests.cs
@@ -999,6 +999,26 @@ public sealed class FleetManifestLintTests
         gatewayManifest.Should().Contain("port: 5400");
     }
 
+    [Fact]
+    public void Gx10DeviceManagementWriteApis_RequireRuntimeBackedOperatorAuth()
+    {
+        var web = Gx10DeploymentContainer("fc-devicemgmt", "deployment-fc-devicemgmt-web.json");
+
+        JsonEnvValue(web, "FlowerCore__Auth__Enabled").Should().Be("true");
+        JsonEnvSecretName(web, "Auth__ApiKey").Should().Be("fc-devicemgmt-runtime");
+        JsonEnvSecretKey(web, "Auth__ApiKey").Should().Be("DEVICE_MANAGEMENT_OPERATOR_API_KEY");
+        JsonEnvSecretOptional(web, "Auth__ApiKey").Should().BeNull();
+        JsonEnvSecretName(web, "FlowerCore__Auth__ApiKey").Should().Be("fc-devicemgmt-runtime");
+        JsonEnvSecretKey(web, "FlowerCore__Auth__ApiKey").Should().Be("DEVICE_MANAGEMENT_OPERATOR_API_KEY");
+        JsonEnvSecretOptional(web, "FlowerCore__Auth__ApiKey").Should().BeNull();
+        JsonEnvSecretName(web, "Auth__AdminApiKey").Should().Be("fc-devicemgmt-runtime");
+        JsonEnvSecretKey(web, "Auth__AdminApiKey").Should().Be("DEVICE_MANAGEMENT_ADMIN_API_KEY");
+        JsonEnvSecretOptional(web, "Auth__AdminApiKey").Should().BeNull();
+        JsonEnvSecretName(web, "FlowerCore__Auth__AdminApiKey").Should().Be("fc-devicemgmt-runtime");
+        JsonEnvSecretKey(web, "FlowerCore__Auth__AdminApiKey").Should().Be("DEVICE_MANAGEMENT_ADMIN_API_KEY");
+        JsonEnvSecretOptional(web, "FlowerCore__Auth__AdminApiKey").Should().BeNull();
+    }
+
     [Fact]
     public void Gx10PhpTenantRoutes_HaveEdgeControlSubstrate()
     {
@@ -1448,9 +1468,13 @@ public sealed class FleetManifestLintTests
 
     private static bool? JsonEnvSecretOptional(JsonElement container, string name)
     {
-        return JsonEnvMapping(container, name) is { } env
-            ? env.GetProperty("valueFrom").GetProperty("secretKeyRef").GetProperty("optional").GetBoolean()
-            : null;
+        if (JsonEnvMapping(container, name) is not { } env)
+        {
+            return null;
+        }
+
+        var secretKeyRef = env.GetProperty("valueFrom").GetProperty("secretKeyRef");
+        return secretKeyRef.TryGetProperty("optional", out var optional) ? optional.GetBoolean() : null;
     }
 
     private static string? JsonEnvValue(JsonElement container, string name)