diff --git a/plugins/example-plugin/web/AGENTS.md b/plugins/example-plugin/web/AGENTS.md
index 24c75a6078..8cde6314ff 100644
--- a/plugins/example-plugin/web/AGENTS.md
+++ b/plugins/example-plugin/web/AGENTS.md
@@ -30,7 +30,7 @@ Runtime contract: `../../../web/packages/studio/src/plugins/types.ts`.
 | Deps | externalize the shared set in `vite.config.ts`; bundle the rest | bundle react / react-dom / react-router / foundations |
 
 Studio injects everything a plugin needs through a **single `host` prop**
-(`host.workspaceId`, `host.auth`, `host.sdk`, `host.navigation`,
+(`host.workspaceId`, `host.apiBaseUrl`, `host.auth`, `host.sdk`, `host.navigation`,
 `host.notifications`, `host.telemetry`, `host.breadcrumbs`) — grouped so new capabilities extend the
 handle without changing `Root`'s signature. Destructure what you use. All are
 backed by Studio's own singletons: `notifications` fires into Studio's shared
@@ -57,6 +57,12 @@ declares a minimal structural `PluginSdk` covering only the hooks this example
 calls. A real plugin either mirrors the calls it needs the same way or, if it can
 resolve the SDK's types, types `host.sdk` as Studio does.
 
+`host.sdk` covers **platform** services only. A plugin that calls *its own*
+service ships its own client, and must prefix every request with
+`host.apiBaseUrl` — Studio's dev-server `/apis` proxy is opt-in, so a bare
+`/apis/...` request hits the dev server rather than the platform whenever
+`VITE_PLATFORM_BASE_URL` is set.
+
 ## Shared UI (`@nemo/common`)
 
 Studio's own table, form, and status components are shared the same way KUI is.
@@ -103,6 +109,7 @@ import { StudioDataView, useStudioDataViewState } from '@nemo/common';
 {
   host: {
     workspaceId: string;
+    apiBaseUrl: string;
     auth: { accessToken: string; getAccessToken: () => string };
     sdk: { platform: /* @nemo/sdk platform hooks */ };
     navigation: { navigate: (to: string) => void; back: () => void };
diff --git a/plugins/example-plugin/web/src/types.ts b/plugins/example-plugin/web/src/types.ts
index f6955147e8..2413d7ecff 100644
--- a/plugins/example-plugin/web/src/types.ts
+++ b/plugins/example-plugin/web/src/types.ts
@@ -61,6 +61,8 @@ export interface PluginTelemetry {
 
 export interface PluginHost {
   workspaceId: string;
+  /** Origin the platform API is served from; empty when same-origin. */
+  apiBaseUrl: string;
   auth: {
     accessToken: string;
     getAccessToken: () => string;
diff --git a/web/packages/common/src/plugin.ts b/web/packages/common/src/plugin.ts
index c0a2a4c864..5b86d00c6a 100644
--- a/web/packages/common/src/plugin.ts
+++ b/web/packages/common/src/plugin.ts
@@ -6,9 +6,11 @@
 
 export { AccessibleTitle } from '@nemo/common/src/components/AccessibleTitle';
 export { AccordionSection } from '@nemo/common/src/components/AccordionSection';
+// CancelJobButton is deliberately NOT exported
 export { ConfirmationModal } from '@nemo/common/src/components/ConfirmationModal';
 export { DeleteConfirmationModal } from '@nemo/common/src/components/DeleteConfirmationModal';
 export type { AccordionSectionProps } from '@nemo/common/src/components/AccordionSection';
+// ErrorPanel is deliberately NOT exported
 export { ExpandableMessage } from '@nemo/common/src/components/ExpandableMessage';
 export { FileTag } from '@nemo/common/src/components/FileTag';
 export type { FileTagProps, FileTagStatus } from '@nemo/common/src/components/FileTag';
@@ -41,6 +43,7 @@ export type { BadgeStatus, StatusConfigEntry } from '@nemo/common/src/components
 export { TableEmptyState } from '@nemo/common/src/components/TableEmptyState';
 
 export { ControlledSelect } from '@nemo/common/src/components/form/ControlledSelect';
+export { ControlledTextArea } from '@nemo/common/src/components/form/ControlledTextArea';
 export { ControlledTextInput } from '@nemo/common/src/components/form/ControlledTextInput';
 
 export { useStudioDataViewState } from '@nemo/common/src/hooks/useStudioDataViewState';
@@ -60,6 +63,8 @@ export {
 } from '@nemo/common/src/utils/query';
 export { triggerDownload } from '@nemo/common/src/utils/file';
 
+export { ENTITY_NAME_HELP, entityNameSchema } from '@nemo/common/src/utils/entityName';
+
 export { getErrorMessage } from '@nemo/common/src/utils/error';
 export { handleFormErrorsGeneric } from '@nemo/common/src/utils/forms/error';
 export { logger, toError } from '@nemo/common/src/utils/logger';
diff --git a/web/packages/studio/src/plugins/PluginRenderer.test.tsx b/web/packages/studio/src/plugins/PluginRenderer.test.tsx
index 77d3b19a22..cd55140e69 100644
--- a/web/packages/studio/src/plugins/PluginRenderer.test.tsx
+++ b/web/packages/studio/src/plugins/PluginRenderer.test.tsx
@@ -108,6 +108,9 @@ describe('PluginRenderer', () => {
     expect(typeof capturedProps?.host.navigation.navigate).toBe('function');
     expect(typeof capturedProps?.host.notifications.notify).toBe('function');
     expect(typeof capturedProps?.host.telemetry.event).toBe('function');
+    // A plugin calling its own service prefixes requests with this; it must be a
+    // string even when unset, so `${apiBaseUrl}${path}` never yields "undefined/...".
+    expect(typeof capturedProps?.host.apiBaseUrl).toBe('string');
   });
 
   it('does not remount on token renewal and getAccessToken returns the new token', () => {
diff --git a/web/packages/studio/src/plugins/PluginRenderer.tsx b/web/packages/studio/src/plugins/PluginRenderer.tsx
index 10f888b511..52605e3f98 100644
--- a/web/packages/studio/src/plugins/PluginRenderer.tsx
+++ b/web/packages/studio/src/plugins/PluginRenderer.tsx
@@ -4,6 +4,7 @@
 import { useToast } from '@nemo/common/src/providers/toast/useToast';
 import { logger } from '@nemo/common/src/utils/logger';
 import * as platformSdk from '@nemo/sdk/generated/platform/api';
+import { PLATFORM_BASE_URL } from '@studio/constants/environment';
 import { useWorkspaceFromPath } from '@studio/hooks/useWorkspaceFromPath';
 import { usePlugins, usePluginsLoaded } from '@studio/plugins/PluginContext';
 import { PluginErrorBoundary } from '@studio/plugins/PluginErrorBoundary';
@@ -61,6 +62,7 @@ export const PluginRenderer = (): ReactElement => {
   const host = useMemo<PluginHost>(
     () => ({
       workspaceId: workspace,
+      apiBaseUrl: PLATFORM_BASE_URL ?? '',
       auth: { accessToken, getAccessToken },
       sdk: STUDIO_SDK,
       navigation: { navigate: (to) => navigate(to), back: () => navigate(-1) },
diff --git a/web/packages/studio/src/plugins/types.ts b/web/packages/studio/src/plugins/types.ts
index c3e6f07cf9..e149058f52 100644
--- a/web/packages/studio/src/plugins/types.ts
+++ b/web/packages/studio/src/plugins/types.ts
@@ -56,6 +56,13 @@ export interface PluginTelemetry {
 /** The host handle Studio injects into every plugin; extend it to add capabilities. */
 export interface PluginHost {
   workspaceId: string;
+  /**
+   * Origin the platform API is served from; empty when same-origin. A plugin
+   * that calls its own service needs this: Studio's dev-server `/apis` proxy is
+   * opt-in, so a relative request would otherwise hit the dev server whenever
+   * VITE_PLATFORM_BASE_URL is set.
+   */
+  apiBaseUrl: string;
   // Access tokens only — refresh tokens must not cross the boundary.
   auth: {
     accessToken: string;