diff --git a/.changeset/metafield-dynamic-options-target.md b/.changeset/metafield-dynamic-options-target.md
new file mode 100644
index 0000000000..2b91b3a9ff
--- /dev/null
+++ b/.changeset/metafield-dynamic-options-target.md
@@ -0,0 +1,5 @@
+---
+'@shopify/ui-extensions': minor
+---
+
+Add the `admin.metafields.options.data` runnable extension target, with its `MetafieldOptionsApi` input and `MetafieldOptionsOutput` output types. An app can supply presentation-only options for its own metafield definitions in the admin's native metafield editors, without writing a `choices` validation. The target is `@private` while it is gated to Shopify-owned apps in Core.
diff --git a/packages/ui-extensions-tester/src/admin/factories.ts b/packages/ui-extensions-tester/src/admin/factories.ts
index aa157d3022..b8b5679a97 100644
--- a/packages/ui-extensions-tester/src/admin/factories.ts
+++ b/packages/ui-extensions-tester/src/admin/factories.ts
@@ -310,6 +310,16 @@ function createCustomerSegmentTemplateMock<T extends ExtensionTarget>(
   };
 }
 
+function createMetafieldOptionsMock<T extends ExtensionTarget>(target: T) {
+  return {
+    ...createMockStandardApi(target),
+    data: {
+      owner: {id: 'gid://shopify/Product/1', type: 'PRODUCT'},
+      metafields: [],
+    },
+  };
+}
+
 // ---------------------------------------------------------------------------
 // Factory map — TypeScript verifies each entry against ApiForTarget<K>
 // ---------------------------------------------------------------------------
@@ -322,6 +332,7 @@ const adminMockFactories: AdminMockFactory = {
   // Runnable targets
   'admin.customers.segmentation-templates.data':
     createCustomerSegmentTemplateMock,
+  'admin.metafields.options.data': createMetafieldOptionsMock,
   'admin.app.tools.data': createMockStandardApi,
 
   // App render targets
diff --git a/packages/ui-extensions-tester/src/tests/admin-factories.test.ts b/packages/ui-extensions-tester/src/tests/admin-factories.test.ts
index 7064916c7c..d08d9fc8a3 100644
--- a/packages/ui-extensions-tester/src/tests/admin-factories.test.ts
+++ b/packages/ui-extensions-tester/src/tests/admin-factories.test.ts
@@ -40,6 +40,17 @@ describe('createMockAdminTargetApi', () => {
     expect(api).not.toHaveProperty('resourcePicker');
   });
 
+  it('creates a metafield options api with owner and definitions data', () => {
+    const api = createMockAdminTargetApi('admin.metafields.options.data');
+
+    expect(api.extension.target).toBe('admin.metafields.options.data');
+    expect(api.data.owner).toStrictEqual({
+      id: 'gid://shopify/Product/1',
+      type: 'PRODUCT',
+    });
+    expect(api.data.metafields).toStrictEqual([]);
+  });
+
   it('creates an app home api with loading controls', () => {
     const api = createMockAdminTargetApi('admin.app.home.render');
 
diff --git a/packages/ui-extensions/src/surfaces/admin/api.ts b/packages/ui-extensions/src/surfaces/admin/api.ts
index 80c382f349..65103b182f 100644
--- a/packages/ui-extensions/src/surfaces/admin/api.ts
+++ b/packages/ui-extensions/src/surfaces/admin/api.ts
@@ -25,6 +25,15 @@ export type {
   CustomerSegmentTemplateApi,
   CustomerSegmentTemplate,
 } from './api/customer-segment-template/customer-segment-template';
+export type {
+  MetafieldOptionsApi,
+  MetafieldOptions,
+  MetafieldOptionsData,
+  MetafieldOptionsDefinition,
+  MetafieldOptionsOutput,
+  MetafieldOptionsOwner,
+  MetafieldOptionsSupportedType,
+} from './api/metafield-options/metafield-options';
 export type {ActionExtensionApi} from './api/action/action';
 export type {BlockExtensionApi} from './api/block/block';
 export type {PrintActionExtensionApi} from './api/print-action/print-action';
diff --git a/packages/ui-extensions/src/surfaces/admin/api/metafield-options/metafield-options.ts b/packages/ui-extensions/src/surfaces/admin/api/metafield-options/metafield-options.ts
new file mode 100644
index 0000000000..3f0454aaa7
--- /dev/null
+++ b/packages/ui-extensions/src/surfaces/admin/api/metafield-options/metafield-options.ts
@@ -0,0 +1,90 @@
+import type {StandardApi} from '../standard/standard';
+import type {ExtensionTarget as AnyExtensionTarget} from '../../extension-targets';
+
+/**
+ * The [metafield definition types](/docs/apps/build/metafields/list-of-data-types) that support app-provided options.
+ * @publicDocs
+ */
+export type MetafieldOptionsSupportedType =
+  | 'single_line_text_field'
+  | 'list.single_line_text_field';
+
+/**
+ * The resource whose metafields the admin is currently editing.
+ * @publicDocs
+ */
+export interface MetafieldOptionsOwner {
+  /** The resource's global ID, or `null` when the resource has not been created yet. */
+  id: string | null;
+  /** The [metafield owner type](/docs/api/admin-graphql/latest/enums/MetafieldOwnerType) of the resource, for example `ARTICLE` or `PRODUCT`. */
+  type: string;
+}
+
+/**
+ * A metafield definition owned by your app that the admin is currently rendering.
+ * @publicDocs
+ */
+export interface MetafieldOptionsDefinition {
+  /** The definition's reserved namespace. */
+  namespace: string;
+  /** The definition's key. */
+  key: string;
+  /** The merchant-facing name of the definition. */
+  name: string;
+  /** The definition's type. */
+  type: MetafieldOptionsSupportedType;
+  /** The value currently held in the editor, or an empty string when unset. */
+  value: string;
+}
+
+/**
+ * The data passed to a metafield options extension. Only definitions owned by your app are included.
+ * @publicDocs
+ */
+export interface MetafieldOptionsData {
+  /** The resource whose metafields are being edited. */
+  owner: MetafieldOptionsOwner;
+  /** The app-owned definitions the admin is asking your extension to supply options for. */
+  metafields: MetafieldOptionsDefinition[];
+}
+
+/**
+ * Presentation-only options for one of your app's metafield definitions.
+ * @publicDocs
+ */
+export interface MetafieldOptions {
+  /** The namespace of the definition these options belong to. Must match one of the definitions in `data.metafields`. */
+  namespace: string;
+  /** The key of the definition these options belong to. Must match one of the definitions in `data.metafields`. */
+  key: string;
+  /** The values the merchant can choose from. Options beyond the first 250 are ignored, and duplicates are removed. */
+  options: string[];
+}
+
+/**
+ * The output returned by a metafield options extension.
+ *
+ * These options are presentation guidance only. They are not persisted as `choices` validations, they do not change
+ * save-time enforcement, and a value already saved on the metafield stays visible even if you stop returning it.
+ * Entries for definitions that are not in `data.metafields` are ignored.
+ * @publicDocs
+ */
+export interface MetafieldOptionsOutput {
+  /** One entry per definition you want to supply options for. Omit a definition to leave it as a free-text field. */
+  metafields: MetafieldOptions[];
+}
+
+/**
+ * The `MetafieldOptionsApi` object provides the context a metafield options extension needs to supply choices for its
+ * own metafield definitions. Access the following properties to read the resource being edited and the app-owned
+ * definitions the admin is rendering.
+ * @publicDocs
+ */
+export interface MetafieldOptionsApi<ExtensionTarget extends AnyExtensionTarget>
+  extends StandardApi<ExtensionTarget> {
+  /**
+   * The resource being edited, and the metafield definitions owned by your app that the admin is rendering. The admin
+   * never includes definitions owned by the merchant or by another app.
+   */
+  data: MetafieldOptionsData;
+}
diff --git a/packages/ui-extensions/src/surfaces/admin/extension-targets.ts b/packages/ui-extensions/src/surfaces/admin/extension-targets.ts
index f5c29ee181..5cac0b46ac 100644
--- a/packages/ui-extensions/src/surfaces/admin/extension-targets.ts
+++ b/packages/ui-extensions/src/surfaces/admin/extension-targets.ts
@@ -12,6 +12,8 @@ import type {
   DiscountFunctionSettingsApi,
   CustomerSegmentTemplateApi,
   CustomerSegmentTemplate,
+  MetafieldOptionsApi,
+  MetafieldOptionsOutput,
   StandardApi,
   IntentRenderApi,
   AppHomeApi,
@@ -40,6 +42,15 @@ export interface ExtensionTargets {
     {templates: CustomerSegmentTemplate[]}
   >;
 
+  /**
+   * A runnable target that supplies presentation-only options for your app's own [metafield](/docs/apps/build/custom-data) definitions in the admin's native metafield editors. Use this target when the values a merchant should choose from are dynamic or come from an external system, so they don't belong in a persisted `choices` validation. The admin only sends you definitions your app owns, it renders and saves the field itself, and the options you return never change save-time validation.
+   * @private
+   */
+  'admin.metafields.options.data': RunnableExtension<
+    MetafieldOptionsApi<'admin.metafields.options.data'>,
+    MetafieldOptionsOutput
+  >;
+
   // Blocks
   /**
    * A block target that displays inline content within the product details page. Use this to show product-specific information, tools, or actions directly on the product page.