diff --git a/web/types/index.ts b/web/types/index.ts
new file mode 100644
index 0000000..4ef8ea4
--- /dev/null
+++ b/web/types/index.ts
@@ -0,0 +1,61 @@
+export interface AuthResponse {
+  accessToken: string;
+  refreshToken: string;
+  activeOrg: ActiveOrg;
+}
+
+export interface ActiveOrg {
+  id: string;
+  name: string;
+  slug: string;
+  role: string;
+}
+
+export interface User {
+  id: string;
+  email: string;
+  displayName: string;
+  activeOrg: ActiveOrg;
+}
+
+export interface Incident {
+  id: string;
+  serviceId: string;
+  serviceName: string;
+  title: string;
+  description?: string;
+  status: 'triggered' | 'acknowledged' | 'mitigated' | 'resolved';
+  version: number;
+  assignedToUserId?: string;
+  assignedToUserName?: string;
+  createdAt: string;
+  acknowledgedAt?: string;
+  mitigatedAt?: string;
+  resolvedAt?: string;
+}
+
+export interface IncidentEvent {
+  id: string;
+  eventType: string;
+  actorUserId?: string;
+  actorUserName?: string;
+  payload?: string;
+  createdAt: string;
+}
+
+export interface Service {
+  id: string;
+  name: string;
+  slug: string;
+  description?: string;
+  createdAt: string;
+}
+
+export interface OrgMember {
+  id: string;
+  userId: string;
+  email: string;
+  displayName: string;
+  role: string;
+  joinedAt: string;
+}