diff --git a/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_agent.ts b/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_agent.ts
index 0b988d831c923..6d5728c1dd99b 100644
--- a/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_agent.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_agent.ts
@@ -11,6 +11,7 @@ import type { DeleteByQueryResponse } from '@elastic/elasticsearch/lib/api/types
 import type { KbnClient } from '@kbn/test';
 import type { Agent, FleetServerAgent, GetOneAgentResponse } from '@kbn/fleet-plugin/common';
 import { AGENT_API_ROUTES } from '@kbn/fleet-plugin/common';
+import { API_VERSIONS } from '@kbn/fleet-plugin/common/constants';
 import type { HostMetadata } from '../types';
 import { FleetAgentGenerator } from '../data_generators/fleet_agent_generator';
 import { wrapErrorAndRejectPromise } from './utils';
@@ -90,6 +91,7 @@ const fetchFleetAgent = async (kbnClient: KbnClient, agentId: string): Promise<A
       .request({
         path: AGENT_API_ROUTES.INFO_PATTERN.replace('{agentId}', agentId),
         method: 'GET',
+        headers: { 'elastic-api-version': API_VERSIONS.public.v1 },
       })
       .catch(wrapErrorAndRejectPromise)) as AxiosResponse<GetOneAgentResponse>
   ).data.item;
diff --git a/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_endpoint_policy.ts b/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_endpoint_policy.ts
index 0730eba99306c..c25234c02ac93 100644
--- a/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_endpoint_policy.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/data_loaders/index_fleet_endpoint_policy.ts
@@ -18,6 +18,7 @@ import type {
 } from '@kbn/fleet-plugin/common';
 import { AGENT_POLICY_API_ROUTES, PACKAGE_POLICY_API_ROUTES } from '@kbn/fleet-plugin/common';
 import { memoize } from 'lodash';
+import { API_VERSIONS } from '@kbn/fleet-plugin/common/constants';
 import { getEndpointPackageInfo } from '../utils/package';
 import type { PolicyData } from '../types';
 import { policyFactory as policyConfigFactory } from '../models/policy_config';
@@ -62,6 +63,7 @@ export const indexFleetEndpointPolicy = async (
       .request({
         path: AGENT_POLICY_API_ROUTES.CREATE_PATTERN,
         method: 'POST',
+        headers: { 'elastic-api-version': API_VERSIONS.public.v1 },
         body: newAgentPolicyData,
       })
       .catch(wrapErrorAndRejectPromise)) as AxiosResponse<CreateAgentPolicyResponse>;
@@ -100,6 +102,7 @@ export const indexFleetEndpointPolicy = async (
     .request({
       path: PACKAGE_POLICY_API_ROUTES.CREATE_PATTERN,
       method: 'POST',
+      headers: { 'elastic-api-version': API_VERSIONS.public.v1 },
       body: newPackagePolicyData,
     })
     .catch(wrapErrorAndRejectPromise)) as AxiosResponse<CreatePackagePolicyResponse>;
@@ -136,6 +139,7 @@ export const deleteIndexedFleetEndpointPolicies = async (
         .request({
           path: PACKAGE_POLICY_API_ROUTES.DELETE_PATTERN,
           method: 'POST',
+          headers: { 'elastic-api-version': API_VERSIONS.public.v1 },
           body: {
             packagePolicyIds: indexData.integrationPolicies.map((policy) => policy.id),
           },
@@ -154,6 +158,7 @@ export const deleteIndexedFleetEndpointPolicies = async (
             .request({
               path: AGENT_POLICY_API_ROUTES.DELETE_PATTERN,
               method: 'POST',
+              headers: { 'elastic-api-version': API_VERSIONS.public.v1 },
               body: {
                 agentPolicyId: agentPolicy.id,
               },
diff --git a/x-pack/plugins/security_solution/common/endpoint/data_loaders/setup_fleet_for_endpoint.ts b/x-pack/plugins/security_solution/common/endpoint/data_loaders/setup_fleet_for_endpoint.ts
index 177dccce73714..32055d2293de2 100644
--- a/x-pack/plugins/security_solution/common/endpoint/data_loaders/setup_fleet_for_endpoint.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/data_loaders/setup_fleet_for_endpoint.ts
@@ -15,6 +15,7 @@ import type {
 } from '@kbn/fleet-plugin/common';
 import { AGENTS_SETUP_API_ROUTES, EPM_API_ROUTES, SETUP_API_ROUTE } from '@kbn/fleet-plugin/common';
 import { ToolingLog } from '@kbn/tooling-log';
+import { API_VERSIONS } from '@kbn/fleet-plugin/common/constants';
 import { UsageTracker } from './usage_tracker';
 import { EndpointDataLoadingError, retryOnError, wrapErrorAndRejectPromise } from './utils';
 
@@ -44,6 +45,9 @@ export const setupFleetForEndpoint = async (
       .request({
         path: SETUP_API_ROUTE,
         method: 'POST',
+        headers: {
+          'elastic-api-version': API_VERSIONS.public.v1,
+        },
       })
       .catch(wrapErrorAndRejectPromise)) as AxiosResponse<PostFleetSetupResponse>;
 
@@ -64,6 +68,9 @@ export const setupFleetForEndpoint = async (
       .request({
         path: AGENTS_SETUP_API_ROUTES.CREATE_PATTERN,
         method: 'POST',
+        headers: {
+          'elastic-api-version': API_VERSIONS.public.v1,
+        },
       })
       .catch(wrapErrorAndRejectPromise)) as AxiosResponse<PostFleetSetupResponse>;
 
@@ -112,6 +119,9 @@ export const installOrUpgradeEndpointFleetPackage = async (
       .request({
         path: EPM_API_ROUTES.BULK_INSTALL_PATTERN,
         method: 'POST',
+        headers: {
+          'elastic-api-version': API_VERSIONS.public.v1,
+        },
         body: {
           packages: ['endpoint'],
         },
diff --git a/x-pack/plugins/security_solution/common/endpoint/utils/package.ts b/x-pack/plugins/security_solution/common/endpoint/utils/package.ts
index c45c44fa9c561..d7145a4a0da49 100644
--- a/x-pack/plugins/security_solution/common/endpoint/utils/package.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/utils/package.ts
@@ -10,6 +10,7 @@ import type { AxiosResponse } from 'axios';
 import type { KbnClient } from '@kbn/test';
 import type { GetInfoResponse } from '@kbn/fleet-plugin/common';
 import { epmRouteService } from '@kbn/fleet-plugin/common';
+import { API_VERSIONS } from '@kbn/fleet-plugin/common/constants';
 
 export const getEndpointPackageInfo = async (
   kbnClient: KbnClient
@@ -19,6 +20,9 @@ export const getEndpointPackageInfo = async (
     (await kbnClient.request({
       path,
       method: 'GET',
+      headers: {
+        'elastic-api-version': API_VERSIONS.public.v1,
+      },
     })) as AxiosResponse<GetInfoResponse>
   ).data.item;