diff --git a/ui/src/api/queries/admin/outboundConnections.ts b/ui/src/api/queries/admin/outboundConnections.ts
new file mode 100644
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+++ b/ui/src/api/queries/admin/outboundConnections.ts
@@ -0,0 +1,128 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { adminFetch } from './admin-api';
+
+// ── Types ──────────────────────────────────────────────────────────────
+
+export type OutboundMethod = 'POST' | 'PUT' | 'PATCH';
+export type OutboundAuthKind = 'NONE' | 'BEARER' | 'BASIC';
+export type TrustMode = 'SYSTEM_DEFAULT' | 'TRUST_ALL' | 'TRUST_PATHS';
+
+// Jackson DEDUCTION mode picks subtype by which fields are present.
+// None = {}, Bearer = { tokenCiphertext }, Basic = { username, passwordCiphertext }.
+// Using a flat optional shape for pragmatic TypeScript compatibility.
+export type OutboundAuth = {
+  tokenCiphertext?: string;
+  username?: string;
+  passwordCiphertext?: string;
+};
+
+// Server returns this shape (`OutboundConnectionDto` in Java)
+export interface OutboundConnectionDto {
+  id: string;
+  name: string;
+  description: string | null;
+  url: string;
+  method: OutboundMethod;
+  defaultHeaders: Record<string, string>;
+  defaultBodyTmpl: string | null;
+  tlsTrustMode: TrustMode;
+  tlsCaPemPaths: string[];
+  hmacSecretSet: boolean;
+  authKind: OutboundAuthKind;
+  allowedEnvironmentIds: string[];
+  createdAt: string;
+  createdBy: string;
+  updatedAt: string;
+  updatedBy: string;
+}
+
+// Client sends this shape for create/update (`OutboundConnectionRequest` in Java)
+export interface OutboundConnectionRequest {
+  name: string;
+  description?: string | null;
+  url: string;
+  method: OutboundMethod;
+  defaultHeaders?: Record<string, string>;
+  defaultBodyTmpl?: string | null;
+  tlsTrustMode: TrustMode;
+  tlsCaPemPaths?: string[];
+  hmacSecret?: string | null;
+  auth: OutboundAuth;
+  allowedEnvironmentIds?: string[];
+}
+
+// Server returns this from POST /{id}/test
+export interface OutboundConnectionTestResult {
+  status: number;
+  latencyMs: number;
+  responseSnippet: string | null;
+  tlsProtocol: string | null;
+  tlsCipherSuite: string | null;
+  peerCertificateSubject: string | null;
+  peerCertificateExpiresAtEpochMs: number | null;
+  error: string | null;
+}
+
+// ── Query Hooks ────────────────────────────────────────────────────────
+
+export function useOutboundConnections() {
+  return useQuery({
+    queryKey: ['admin', 'outbound-connections'],
+    queryFn: () => adminFetch<OutboundConnectionDto[]>('/outbound-connections'),
+  });
+}
+
+export function useOutboundConnection(id: string | undefined) {
+  return useQuery({
+    queryKey: ['admin', 'outbound-connections', id],
+    queryFn: () => adminFetch<OutboundConnectionDto>(`/outbound-connections/${id}`),
+    enabled: !!id,
+  });
+}
+
+// ── Mutation Hooks ─────────────────────────────────────────────────────
+
+export function useCreateOutboundConnection() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (req: OutboundConnectionRequest) =>
+      adminFetch<OutboundConnectionDto>('/outbound-connections', {
+        method: 'POST',
+        body: JSON.stringify(req),
+      }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'outbound-connections'] }),
+  });
+}
+
+export function useUpdateOutboundConnection(id: string) {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (req: OutboundConnectionRequest) =>
+      adminFetch<OutboundConnectionDto>(`/outbound-connections/${id}`, {
+        method: 'PUT',
+        body: JSON.stringify(req),
+      }),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['admin', 'outbound-connections'] });
+      qc.invalidateQueries({ queryKey: ['admin', 'outbound-connections', id] });
+    },
+  });
+}
+
+export function useDeleteOutboundConnection() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: (id: string) =>
+      adminFetch<void>(`/outbound-connections/${id}`, { method: 'DELETE' }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'outbound-connections'] }),
+  });
+}
+
+export function useTestOutboundConnection() {
+  return useMutation({
+    mutationFn: (id: string) =>
+      adminFetch<OutboundConnectionTestResult>(`/outbound-connections/${id}/test`, {
+        method: 'POST',
+      }),
+  });
+}