diff --git a/frontend/src/hooks/api/actions/useFeatureLifecycleApi/useFeatureLifecycleApi.ts b/frontend/src/hooks/api/actions/useFeatureLifecycleApi/useFeatureLifecycleApi.ts
index 76d590ef7b..09551ec0fc 100644
--- a/frontend/src/hooks/api/actions/useFeatureLifecycleApi/useFeatureLifecycleApi.ts
+++ b/frontend/src/hooks/api/actions/useFeatureLifecycleApi/useFeatureLifecycleApi.ts
@@ -10,6 +10,7 @@ const useFeatureLifecycleApi = () => {
         const path = `api/admin/projects/${project}/features/${name}/lifecycle/complete`;
         const req = createRequest(path, {
             method: 'POST',
+            body: JSON.stringify({ status: 'kept' }),
         });
 
         return makeRequest(req.caller, req.id);
diff --git a/src/lib/features/feature-lifecycle/feature-lifecycle-controller.ts b/src/lib/features/feature-lifecycle/feature-lifecycle-controller.ts
index d91b8b74cf..be415264a2 100644
--- a/src/lib/features/feature-lifecycle/feature-lifecycle-controller.ts
+++ b/src/lib/features/feature-lifecycle/feature-lifecycle-controller.ts
@@ -9,6 +9,7 @@ import {
 } from '../../types';
 import type { OpenApiService } from '../../services';
 import {
+    createRequestSchema,
     createResponseSchema,
     emptyResponse,
     featureLifecycleSchema,
@@ -78,6 +79,9 @@ export default class FeatureLifecycleController extends Controller {
                     summary: 'Set feature completed',
                     description: 'This will set the feature as completed.',
                     operationId: 'complete',
+                    requestBody: createRequestSchema(
+                        'featureLifecycleCompletedSchema',
+                    ),
                     responses: {
                         200: emptyResponse,
                         ...getStandardResponses(401, 403, 404),
diff --git a/src/lib/features/feature-lifecycle/feature-lifecycle.e2e.test.ts b/src/lib/features/feature-lifecycle/feature-lifecycle.e2e.test.ts
index 8902f9ba44..ec05cbb0ed 100644
--- a/src/lib/features/feature-lifecycle/feature-lifecycle.e2e.test.ts
+++ b/src/lib/features/feature-lifecycle/feature-lifecycle.e2e.test.ts
@@ -17,6 +17,7 @@ import {
     type FeatureLifecycleService,
     STAGE_ENTERED,
 } from './feature-lifecycle-service';
+import type { FeatureLifecycleCompletedSchema } from '../../openapi';
 
 let app: IUnleashTest;
 let db: ITestDb;
@@ -61,11 +62,16 @@ const getFeatureLifecycle = async (featureName: string, expectedCode = 200) => {
         .get(`/api/admin/projects/default/features/${featureName}/lifecycle`)
         .expect(expectedCode);
 };
-const completeFeature = async (featureName: string, expectedCode = 200) => {
+const completeFeature = async (
+    featureName: string,
+    status: FeatureLifecycleCompletedSchema,
+    expectedCode = 200,
+) => {
     return app.request
         .post(
             `/api/admin/projects/default/features/${featureName}/lifecycle/complete`,
         )
+        .send(status)
         .expect(expectedCode);
 };
 
@@ -156,7 +162,10 @@ test('should return lifecycle stages', async () => {
 test('should be able to toggle between completed/uncompleted', async () => {
     await app.createFeature('my_feature_b');
 
-    await completeFeature('my_feature_b');
+    await completeFeature('my_feature_b', {
+        status: 'kept',
+        statusValue: 'variant1',
+    });
 
     await expectFeatureStage('my_feature_b', 'completed');
 
diff --git a/src/lib/openapi/spec/feature-lifecycle-completed-schema.test.ts b/src/lib/openapi/spec/feature-lifecycle-completed-schema.test.ts
new file mode 100644
index 0000000000..812f7e264d
--- /dev/null
+++ b/src/lib/openapi/spec/feature-lifecycle-completed-schema.test.ts
@@ -0,0 +1,29 @@
+import { validateSchema } from '../validate';
+import type { FeatureLifecycleCompletedSchema } from './feature-lifecycle-completed-schema';
+
+test('featureLifecycleCompletedSchema', () => {
+    const data: FeatureLifecycleCompletedSchema = {
+        status: 'kept',
+        statusValue: 'variant1',
+    };
+
+    expect(
+        validateSchema(
+            '#/components/schemas/featureLifecycleCompletedSchema',
+            data,
+        ),
+    ).toBeUndefined();
+});
+
+test('featureLifecycleCompletedSchema without status', () => {
+    const data: FeatureLifecycleCompletedSchema = {
+        status: 'kept',
+    };
+
+    expect(
+        validateSchema(
+            '#/components/schemas/featureLifecycleCompletedSchema',
+            data,
+        ),
+    ).toBeUndefined();
+});
diff --git a/src/lib/openapi/spec/feature-lifecycle-completed-schema.ts b/src/lib/openapi/spec/feature-lifecycle-completed-schema.ts
new file mode 100644
index 0000000000..e08a817dfe
--- /dev/null
+++ b/src/lib/openapi/spec/feature-lifecycle-completed-schema.ts
@@ -0,0 +1,30 @@
+import type { FromSchema } from 'json-schema-to-ts';
+
+export const featureLifecycleCompletedSchema = {
+    $id: '#/components/schemas/featureLifecycleCompletedSchema',
+    description: 'A feature that has been marked as completed',
+    additionalProperties: false,
+    type: 'object',
+    required: ['status'],
+    properties: {
+        status: {
+            type: 'string',
+            enum: ['kept', 'discarded'],
+            example: 'kept',
+            description:
+                'The status of the feature after it has been marked as completed',
+        },
+        statusValue: {
+            type: 'string',
+            example: 'variant1',
+            description: 'The metadata value passed in together with status',
+        },
+    },
+    components: {
+        schemas: {},
+    },
+} as const;
+
+export type FeatureLifecycleCompletedSchema = FromSchema<
+    typeof featureLifecycleCompletedSchema
+>;
diff --git a/src/lib/openapi/spec/index.ts b/src/lib/openapi/spec/index.ts
index b4dc8ae6a7..5e24718c14 100644
--- a/src/lib/openapi/spec/index.ts
+++ b/src/lib/openapi/spec/index.ts
@@ -75,6 +75,7 @@ export * from './feature-dependencies-schema';
 export * from './feature-environment-metrics-schema';
 export * from './feature-environment-schema';
 export * from './feature-events-schema';
+export * from './feature-lifecycle-completed-schema';
 export * from './feature-lifecycle-schema';
 export * from './feature-metrics-schema';
 export * from './feature-schema';