diff --git a/iam/v1/iam.proto b/iam/v1/iam.proto
index b6bfcf5a..3076ef62 100644
--- a/iam/v1/iam.proto
+++ b/iam/v1/iam.proto
@@ -9,6 +9,7 @@ import "api/rbac.proto";
 import "google/api/annotations.proto";
 import "protoc-gen-openapiv2/options/annotations.proto";
 import "google/protobuf/empty.proto";
+import "google/protobuf/timestamp.proto";
 
 option go_package = "github.com/alphauslabs/blueapi/iam";
 option java_package = "cloud.alphaus.api.iam";
@@ -298,14 +299,29 @@ service Iam {
       body: "*"
     };
   }
-  
+
+  // Gets experimental UI preferences for the authenticated MSP.
+  rpc GetExperimentalUIPreferences(GetExperimentalUIPreferencesRequest) returns (GetExperimentalUIPreferencesResponse) {
+    option (google.api.http) = {
+      get: "/iam/v1/experimentalui/preferences"
+    };
+  }
+
+  // Creates or updates an experimental UI preference for a specific component.
+  rpc UpsertExperimentalUIPreference(UpsertExperimentalUIPreferenceRequest) returns (UpsertExperimentalUIPreferenceResponse) {
+    option (google.api.http) = {
+      put: "/iam/v1/experimentalui/preferences/{component_id}"
+      body: "*"
+    };
+  }
+
   // WORK-IN-PROGRESS: Unlocks ripple or wave user account.
   rpc UnlockUserAccount(UnlockUserAccountRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       post: "/iam/v1/{domain}/account:unlock"
       body: "*"
     };
-  } 
+  }
 }
 
 // Request message for the Iam.WhoAmI rpc.
@@ -681,6 +697,48 @@ message ResetRipplePasswordResponse {
   string email = 2;
 }
 
+// ExperimentalUIPreference holds the UI version preference and banner state for a single component.
+message ExperimentalUIPreference {
+  // The component identifier this preference applies to.
+  string component_id = 1;
+
+  // The selected UI version for the component (e.g. "v1" or "v2").
+  string version = 2;
+
+  // Whether the experimental banner has been dismissed for this component.
+  bool banner_dismissed = 3;
+
+  // The timestamp of the last update.
+  google.protobuf.Timestamp updated_at = 4;
+}
+
+// Request message for the Iam.GetExperimentalUIPreferences rpc.
+// The MSP identity is derived from the auth token server-side.
+message GetExperimentalUIPreferencesRequest {}
+
+// Response message for the Iam.GetExperimentalUIPreferences rpc.
+message GetExperimentalUIPreferencesResponse {
+  // The list of experimental UI preferences for the authenticated MSP.
+  repeated ExperimentalUIPreference preferences = 1;
+}
+
+// Request message for the Iam.UpsertExperimentalUIPreference rpc.
+message UpsertExperimentalUIPreferenceRequest {
+  // The component identifier to create or update a preference for.
+  string component_id = 1;
+
+  // The selected UI version for the component (e.g. "v1" or "v2").
+  string version = 2;
+
+  // Whether the experimental banner has been dismissed for this component.
+  bool banner_dismissed = 3;
+}
+
+// Response message for the Iam.UpsertExperimentalUIPreference rpc.
+message UpsertExperimentalUIPreferenceResponse {
+  // The created or updated preference.
+  ExperimentalUIPreference preference = 1;
+}
 
 message UnlockUserAccountRequest {
   // Required. Valid values are 'ripple' and 'wave'
@@ -688,10 +746,10 @@ message UnlockUserAccountRequest {
 
   // Required. The email of the user account to unlock.
   string email = 2;
-  
+
   // IsRoot is true if Ripple or Wave root user, false if sub user.
   bool is_root = 3;
-  
+
   // Required if wave sub user.
   string user_name = 4;
-}
\ No newline at end of file
+}
diff --git a/openapiv2/apidocs.swagger.json b/openapiv2/apidocs.swagger.json
index d4f1b39f..5c81651c 100644
--- a/openapiv2/apidocs.swagger.json
+++ b/openapiv2/apidocs.swagger.json
@@ -1924,6 +1924,69 @@
         ]
       }
     },
+    "/iam/v1/experimentalui/preferences": {
+      "get": {
+        "summary": "Gets experimental UI preferences for the authenticated MSP.",
+        "operationId": "Iam_GetExperimentalUIPreferences",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/v1GetExperimentalUIPreferencesResponse"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/googlerpcStatus"
+            }
+          }
+        },
+        "tags": [
+          "Iam"
+        ]
+      }
+    },
+    "/iam/v1/experimentalui/preferences/{component_id}": {
+      "put": {
+        "summary": "Creates or updates an experimental UI preference for a specific component.",
+        "operationId": "Iam_UpsertExperimentalUIPreference",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/v1UpsertExperimentalUIPreferenceResponse"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/googlerpcStatus"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "component_id",
+            "description": "The component identifier to create or update a preference for.",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/v1UpsertExperimentalUIPreferenceRequest"
+            }
+          }
+        ],
+        "tags": [
+          "Iam"
+        ]
+      }
+    },
     "/iam/v1/ripple/password:reset": {
       "post": {
         "summary": "WORK-IN-PROGRESS: Reset ripple password using code from email",
@@ -48562,6 +48625,67 @@
       },
       "title": "Response message for ResetPassword"
     },
+    "v1ExperimentalUIPreference": {
+      "type": "object",
+      "properties": {
+        "component_id": {
+          "type": "string",
+          "description": "The component identifier this preference applies to."
+        },
+        "version": {
+          "type": "string",
+          "description": "The selected UI version for the component (e.g. \"v1\" or \"v2\")."
+        },
+        "banner_dismissed": {
+          "type": "boolean",
+          "description": "Whether the experimental banner has been dismissed for this component."
+        },
+        "updated_at": {
+          "type": "string",
+          "format": "date-time",
+          "description": "The timestamp of the last update."
+        }
+      },
+      "description": "RippleExperimentalPreference holds the UI version preference and banner state for a single component."
+    },
+    "v1GetExperimentalUIPreferencesResponse": {
+      "type": "object",
+      "properties": {
+        "preferences": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/v1ExperimentalUIPreference"
+          },
+          "description": "The list of experimental UI preferences for the authenticated MSP."
+        }
+      }
+    },
+    "v1UpsertExperimentalUIPreferenceRequest": {
+      "type": "object",
+      "properties": {
+        "component_id": {
+          "type": "string",
+          "description": "The component identifier to create or update a preference for."
+        },
+        "version": {
+          "type": "string",
+          "description": "The selected UI version for the component (e.g. \"v1\" or \"v2\")."
+        },
+        "banner_dismissed": {
+          "type": "boolean",
+          "description": "Whether the experimental banner has been dismissed for this component."
+        }
+      }
+    },
+    "v1UpsertExperimentalUIPreferenceResponse": {
+      "type": "object",
+      "properties": {
+        "preference": {
+          "$ref": "#/definitions/v1ExperimentalUIPreference",
+          "description": "The created or updated preference."
+        }
+      }
+    },
     "v1ResetRipplePasswordRequest": {
       "type": "object",
       "properties": {