diff --git a/proto/aquila/aquila.runtime_status.proto b/proto/aquila/aquila.runtime_status.proto
new file mode 100644
index 0000000..f916dd9
--- /dev/null
+++ b/proto/aquila/aquila.runtime_status.proto
@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package aquila;
+
+import "shared.runtime_status.proto";
+
+option ruby_package = "Tucana::Aquila";
+
+message RuntimeStatusUpdateRequest {
+  oneof status {
+    shared.AdapterRuntimeStatus adapter_runtime_status = 1;
+    shared.ExecutionRuntimeStatus execution_runtime_status = 2;
+  }
+}
+
+message RuntimeStatusUpdateResponse {
+  bool success = 1;
+}
+
+service RuntimeStatusService {
+  rpc Update(RuntimeStatusUpdateRequest) returns (RuntimeStatusUpdateResponse) {}
+}
diff --git a/proto/sagittarius/sagittarius.runtime_status.proto b/proto/sagittarius/sagittarius.runtime_status.proto
new file mode 100644
index 0000000..fa5e4a6
--- /dev/null
+++ b/proto/sagittarius/sagittarius.runtime_status.proto
@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package sagittarius;
+
+import "shared.runtime_status.proto";
+
+option ruby_package = "Tucana::Sagittarius";
+
+message RuntimeStatusUpdateRequest {
+  oneof status {
+    shared.AdapterRuntimeStatus adapter_runtime_status = 1;
+    shared.ExecutionRuntimeStatus execution_runtime_status = 2;
+  }
+}
+
+message RuntimeStatusUpdateResponse {
+  bool success = 1;
+}
+
+service RuntimeStatusService {
+  rpc Update(RuntimeStatusUpdateRequest) returns (RuntimeStatusUpdateResponse) {}
+}
diff --git a/proto/shared/shared.runtime_status.proto b/proto/shared/shared.runtime_status.proto
new file mode 100644
index 0000000..748a8b4
--- /dev/null
+++ b/proto/shared/shared.runtime_status.proto
@@ -0,0 +1,45 @@
+syntax = "proto3";
+
+package shared;
+
+option ruby_package = "Tucana::Shared";
+
+import "shared.translation.proto";
+
+message AdapterConfiguration {
+  oneof data {
+    string endpoint = 1; // e.g. URL, ...
+  }
+}
+
+enum RuntimeStatus {
+  UNKNOWN = 0;
+  NOT_RESPONDING = 1;
+  NOT_READY = 2;
+  RUNNING = 3;
+  STOPPED = 4;
+}
+
+message RuntimeFeature {
+  repeated shared.Translation name = 1;
+  repeated shared.Translation description = 2;
+}
+
+message AdapterRuntimeStatus {
+  RuntimeStatus status = 1;
+  int64 timestamp = 2; // epoch timestamp in milliseconds
+
+  string identifier = 3; // unique identifier of the adapter
+
+  repeated RuntimeFeature features = 4;
+  repeated AdapterConfiguration configurations = 5;
+}
+
+message ExecutionRuntimeStatus {
+  RuntimeStatus status = 1;
+  int64 timestamp = 2; // epoch timestamp in milliseconds
+
+  string identifier = 3; // unique identifier of the adapter
+
+  repeated RuntimeFeature features = 4;
+}