diff --git a/ui/src/api/account-hooks.ts b/ui/src/api/account-hooks.ts
new file mode 100644
index 0000000..748ec01
--- /dev/null
+++ b/ui/src/api/account-hooks.ts
@@ -0,0 +1,100 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { api } from './client';
+import type { AccountProfile, MfaStatus, MfaSetupResponse, BackupCodesResponse, PasskeyCredential } from '../types/api';
+
+// --- Profile ---
+
+export function useAccountProfile() {
+  return useQuery<AccountProfile>({
+    queryKey: ['account', 'profile'],
+    queryFn: () => api.get('/account/profile'),
+  });
+}
+
+export function useUpdateDisplayName() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, string>({
+    mutationFn: (name) => api.patch('/account/profile', { name }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'profile'] }),
+  });
+}
+
+// --- Password ---
+
+export function useChangePassword() {
+  return useMutation<void, Error, { currentPassword: string; newPassword: string }>({
+    mutationFn: (body) => api.post('/account/password', body),
+  });
+}
+
+// --- MFA ---
+
+export function useAccountMfaStatus() {
+  return useQuery<MfaStatus>({
+    queryKey: ['account', 'mfa', 'status'],
+    queryFn: () => api.get('/account/mfa/status'),
+  });
+}
+
+export function useAccountMfaSetup() {
+  return useMutation<MfaSetupResponse, Error, void>({
+    mutationFn: () => api.post('/account/mfa/totp/setup'),
+  });
+}
+
+export function useAccountMfaVerify() {
+  const qc = useQueryClient();
+  return useMutation<{ verified: boolean }, Error, { secret: string; code: string }>({
+    mutationFn: (body) => api.post('/account/mfa/totp/verify', body),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'mfa'] }),
+  });
+}
+
+export function useAccountBackupCodes() {
+  const qc = useQueryClient();
+  return useMutation<BackupCodesResponse, Error, void>({
+    mutationFn: () => api.post('/account/mfa/backup-codes'),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'mfa'] }),
+  });
+}
+
+export function useAccountMfaRemove() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, void>({
+    mutationFn: () => api.delete('/account/mfa/totp'),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'mfa'] }),
+  });
+}
+
+// --- Passkeys ---
+
+export function useAccountPasskeyList() {
+  return useQuery<PasskeyCredential[]>({
+    queryKey: ['account', 'mfa', 'webauthn'],
+    queryFn: () => api.get('/account/mfa/webauthn'),
+  });
+}
+
+export function useAccountRenamePasskey() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, { id: string; name: string }>({
+    mutationFn: ({ id, name }) => api.patch(`/account/mfa/webauthn/${id}/name`, { name }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'mfa'] }),
+  });
+}
+
+export function useAccountDeletePasskey() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, string>({
+    mutationFn: (id) => api.delete(`/account/mfa/webauthn/${id}`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['account', 'mfa'] }),
+  });
+}
+
+// --- MFA Preference ---
+
+export function useAccountMfaPreference() {
+  return useMutation<void, Error, string>({
+    mutationFn: (preference) => api.post('/account/mfa/method-preference', { preference }),
+  });
+}
diff --git a/ui/src/api/vendor-admin-hooks.ts b/ui/src/api/vendor-admin-hooks.ts
new file mode 100644
index 0000000..780e576
--- /dev/null
+++ b/ui/src/api/vendor-admin-hooks.ts
@@ -0,0 +1,43 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { api } from './client';
+import type { VendorAdmin, CreateAdminRequest, CreateAdminResponse } from '../types/api';
+
+export function useVendorAdminList() {
+  return useQuery<VendorAdmin[]>({
+    queryKey: ['vendor', 'admins'],
+    queryFn: () => api.get('/vendor/admins'),
+  });
+}
+
+export function useCreateVendorAdmin() {
+  const qc = useQueryClient();
+  return useMutation<CreateAdminResponse, Error, CreateAdminRequest>({
+    mutationFn: (req) => api.post('/vendor/admins', req),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['vendor', 'admins'] }),
+  });
+}
+
+export function useRemoveVendorAdmin() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, string>({
+    mutationFn: (userId) => api.delete(`/vendor/admins/${userId}`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['vendor', 'admins'] }),
+  });
+}
+
+export function useResetVendorAdminPassword() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, { userId: string; password: string }>({
+    mutationFn: ({ userId, password }) =>
+      api.post(`/vendor/admins/${userId}/reset-password`, { password }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['vendor', 'admins'] }),
+  });
+}
+
+export function useResetVendorAdminMfa() {
+  const qc = useQueryClient();
+  return useMutation<void, Error, string>({
+    mutationFn: (userId) => api.delete(`/vendor/admins/${userId}/mfa`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['vendor', 'admins'] }),
+  });
+}
diff --git a/ui/src/types/api.ts b/ui/src/types/api.ts
index aeab2d2..f2488ef 100644
--- a/ui/src/types/api.ts
+++ b/ui/src/types/api.ts
@@ -273,3 +273,27 @@ export interface AuthPolicy {
   passkeyEnabled: boolean;
   passkeyMode: string;
 }
+
+// Account profile types
+export interface AccountProfile {
+  userId: string;
+  name: string;
+  email: string;
+}
+
+// Vendor admin types
+export interface VendorAdmin {
+  userId: string;
+  name: string;
+  email: string;
+}
+
+export interface CreateAdminRequest {
+  email: string;
+  tempPassword?: string;
+}
+
+export interface CreateAdminResponse {
+  invited: boolean;
+  tempPassword: string | null;
+}