diff --git a/src/lib/openapi/spec/instance-admin-stats-schema.ts b/src/lib/openapi/spec/instance-admin-stats-schema.ts
index cdbc1f33cf19..0a54a3e7b36d 100644
--- a/src/lib/openapi/spec/instance-admin-stats-schema.ts
+++ b/src/lib/openapi/spec/instance-admin-stats-schema.ts
@@ -220,6 +220,30 @@ export const instanceAdminStatsSchema = {
             example: 0,
             minimum: 0,
         },
+        apiTokens: {
+            type: 'object',
+            description: 'The number of API tokens in Unleash, split by type',
+            properties: {
+                admin: {
+                    type: 'number',
+                    description: 'The number of admin tokens.',
+                    minimum: 0,
+                    example: 5,
+                },
+                client: {
+                    type: 'number',
+                    description: 'The number of client tokens.',
+                    minimum: 0,
+                    example: 5,
+                },
+                frontend: {
+                    type: 'number',
+                    description: 'The number of frontend tokens.',
+                    minimum: 0,
+                    example: 5,
+                },
+            },
+        },
         sum: {
             type: 'string',
             description:
diff --git a/src/lib/routes/admin-api/instance-admin.ts b/src/lib/routes/admin-api/instance-admin.ts
index 65e1b457b79c..89d81fabbf8c 100644
--- a/src/lib/routes/admin-api/instance-admin.ts
+++ b/src/lib/routes/admin-api/instance-admin.ts
@@ -5,7 +5,6 @@ import type { IUnleashServices } from '../../types/services';
 import type { IUnleashConfig } from '../../types/option';
 import Controller from '../controller';
 import { NONE } from '../../types/permissions';
-import type { UiConfigSchema } from '../../openapi/spec/ui-config-schema';
 import type {
     InstanceStatsService,
     InstanceStatsSigned,
@@ -15,6 +14,8 @@ import {
     createCsvResponseSchema,
     createResponseSchema,
 } from '../../openapi/util/create-response-schema';
+import type { InstanceAdminStatsSchema } from '../../openapi';
+import { serializeDates } from '../../types';
 
 class InstanceAdminController extends Controller {
     private instanceStatsService: InstanceStatsService;
@@ -128,17 +129,29 @@ class InstanceAdminController extends Controller {
         };
     }
 
+    private serializeStats(
+        instanceStats: InstanceStatsSigned,
+    ): InstanceAdminStatsSchema {
+        const apiTokensObj = Object.fromEntries(
+            instanceStats.apiTokens.entries(),
+        );
+        return serializeDates({
+            ...instanceStats,
+            apiTokens: apiTokensObj,
+        });
+    }
+
     async getStatistics(
-        req: AuthedRequest,
-        res: Response<InstanceStatsSigned>,
+        _: AuthedRequest,
+        res: Response<InstanceAdminStatsSchema>,
     ): Promise<void> {
         const instanceStats = await this.instanceStatsService.getSignedStats();
-        res.json(instanceStats);
+        res.json(this.serializeStats(instanceStats));
     }
 
     async getStatisticsCSV(
-        req: AuthedRequest,
-        res: Response<UiConfigSchema>,
+        _: AuthedRequest,
+        res: Response<InstanceAdminStatsSchema>,
     ): Promise<void> {
         const instanceStats = await this.instanceStatsService.getSignedStats();
         const fileName = `unleash-${
@@ -146,7 +159,7 @@ class InstanceAdminController extends Controller {
         }-${Date.now()}.csv`;
 
         const json2csvParser = new Parser();
-        const csv = json2csvParser.parse(instanceStats);
+        const csv = json2csvParser.parse(this.serializeStats(instanceStats));
 
         res.contentType('csv');
         res.attachment(fileName);
diff --git a/src/test/e2e/api/admin/instance-admin.e2e.test.ts b/src/test/e2e/api/admin/instance-admin.e2e.test.ts
index ec8249799014..5534b4bd80e5 100644
--- a/src/test/e2e/api/admin/instance-admin.e2e.test.ts
+++ b/src/test/e2e/api/admin/instance-admin.e2e.test.ts
@@ -5,6 +5,7 @@ import {
 } from '../../helpers/test-helper';
 import getLogger from '../../../fixtures/no-logger';
 import type { IUnleashStores } from '../../../../lib/types';
+import { ApiTokenType } from '../../../../lib/types/models/api-token';
 
 let app: IUnleashTest;
 let db: ITestDb;
@@ -47,6 +48,43 @@ test('should return instance statistics', async () => {
         });
 });
 
+test('api tokens are serialized correctly', async () => {
+    await app.services.apiTokenService.createApiTokenWithProjects({
+        tokenName: 'admin',
+        type: ApiTokenType.ADMIN,
+        environment: '*',
+        projects: ['*'],
+    });
+    await app.services.apiTokenService.createApiTokenWithProjects({
+        tokenName: 'frontend',
+        type: ApiTokenType.FRONTEND,
+        environment: 'default',
+        projects: ['*'],
+    });
+    await app.services.apiTokenService.createApiTokenWithProjects({
+        tokenName: 'client',
+        type: ApiTokenType.CLIENT,
+        environment: 'default',
+        projects: ['*'],
+    });
+
+    const { body } = await app.request
+        .get('/api/admin/instance-admin/statistics')
+        .expect('Content-Type', /json/)
+        .expect(200);
+
+    expect(body).toMatchObject({
+        apiTokens: { client: 1, admin: 1, frontend: 1 },
+    });
+
+    const { text: csv } = await app.request
+        .get('/api/admin/instance-admin/statistics/csv')
+        .expect('Content-Type', /text\/csv/)
+        .expect(200);
+
+    expect(csv).toMatch(/{""client"":1,""admin"":1,""frontend"":1}/);
+});
+
 test('should return instance statistics with correct number of projects', async () => {
     await stores.projectStore.create({
         id: 'test',
@@ -77,7 +115,7 @@ test('should return signed instance statistics', async () => {
         });
 });
 
-test('should return instance statistics as CVS', async () => {
+test('should return instance statistics as CSV', async () => {
     await stores.featureToggleStore.create('default', {
         name: 'TestStats2',
         createdByUserId: 9999,