diff --git a/src/lib/__snapshots__/create-config.test.ts.snap b/src/lib/__snapshots__/create-config.test.ts.snap
index f12556a309..614dcce0d9 100644
--- a/src/lib/__snapshots__/create-config.test.ts.snap
+++ b/src/lib/__snapshots__/create-config.test.ts.snap
@@ -100,6 +100,7 @@ exports[`should create default config 1`] = `
       "enableLicenseChecker": false,
       "encryptEmails": false,
       "estimateTrafficDataCost": false,
+      "extendedMetrics": false,
       "extendedUsageMetrics": false,
       "featureLifecycle": false,
       "featureSearchFeedback": {
diff --git a/src/lib/features/metrics/client-metrics/metrics-service-v2.ts b/src/lib/features/metrics/client-metrics/metrics-service-v2.ts
index a753c3d76b..c002ef3fbe 100644
--- a/src/lib/features/metrics/client-metrics/metrics-service-v2.ts
+++ b/src/lib/features/metrics/client-metrics/metrics-service-v2.ts
@@ -4,7 +4,7 @@ import {
     type IFlagResolver,
     type IUnleashConfig,
 } from '../../../types';
-import type { IUnleashStores } from '../../../types';
+import type { ISdkHeartbeat, IUnleashStores } from '../../../types';
 import type { ToggleMetricsSummary } from '../../../types/models/metrics';
 import type {
     IClientMetricsEnv,
@@ -12,7 +12,7 @@ import type {
 } from './client-metrics-store-v2-type';
 import { clientMetricsSchema } from '../shared/schema';
 import { compareAsc } from 'date-fns';
-import { CLIENT_METRICS } from '../../../types/events';
+import { CLIENT_METRICS, CLIENT_REGISTER } from '../../../types/events';
 import ApiUser, { type IApiUser } from '../../../types/api-user';
 import { ALL } from '../../../types/models/api-token';
 import type { IUser } from '../../../types/user';
@@ -157,6 +157,22 @@ export default class ClientMetricsServiceV2 {
             `Got ${toggleNames.length} (${validatedToggleNames.length} valid) metrics from ${clientIp}`,
         );
 
+        if (data.sdkVersion) {
+            const [sdkName, sdkVersion] = data.sdkVersion.split(':');
+            const heartbeatEvent: ISdkHeartbeat = {
+                sdkName,
+                sdkVersion,
+                metadata: {
+                    platformName: data.platformName,
+                    platformVersion: data.platformVersion,
+                    yggdrasilVersion: data.yggdrasilVersion,
+                    specVersion: data.specVersion,
+                },
+            };
+
+            this.config.eventBus.emit(CLIENT_REGISTER, heartbeatEvent);
+        }
+
         if (validatedToggleNames.length > 0) {
             const clientMetrics: IClientMetricsEnv[] = validatedToggleNames.map(
                 (name) => ({
diff --git a/src/lib/features/metrics/instance/instance-service.ts b/src/lib/features/metrics/instance/instance-service.ts
index 315d3a16e4..30ff24ce14 100644
--- a/src/lib/features/metrics/instance/instance-service.ts
+++ b/src/lib/features/metrics/instance/instance-service.ts
@@ -12,7 +12,7 @@ import type {
 import type { IFeatureToggleStore } from '../../feature-toggle/types/feature-toggle-store-type';
 import type { IStrategyStore } from '../../../types/stores/strategy-store';
 import type { IClientInstanceStore } from '../../../types/stores/client-instance-store';
-import type { IClientApp } from '../../../types/model';
+import type { IClientApp, ISdkHeartbeat } from '../../../types/model';
 import { clientRegisterSchema } from '../shared/schema';
 
 import type { IClientMetricsStoreV2 } from '../client-metrics/client-metrics-store-v2-type';
@@ -105,7 +105,22 @@ export default class ClientInstanceService {
         value.clientIp = clientIp;
         value.createdBy = SYSTEM_USER.username!;
         this.seenClients[this.clientKey(value)] = value;
-        this.eventStore.emit(CLIENT_REGISTER, value);
+
+        if (value.sdkVersion && value.sdkVersion.indexOf(':') > -1) {
+            const [sdkName, sdkVersion] = value.sdkVersion.split(':');
+            const heartbeatEvent: ISdkHeartbeat = {
+                sdkName,
+                sdkVersion,
+                metadata: {
+                    platformName: data.platformName,
+                    platformVersion: data.platformVersion,
+                    yggdrasilVersion: data.yggdrasilVersion,
+                    specVersion: data.specVersion,
+                },
+            };
+
+            this.eventStore.emit(CLIENT_REGISTER, heartbeatEvent);
+        }
     }
 
     async announceUnannounced(): Promise<void> {
diff --git a/src/lib/metrics.test.ts b/src/lib/metrics.test.ts
index 94ef576511..a4020332bb 100644
--- a/src/lib/metrics.test.ts
+++ b/src/lib/metrics.test.ts
@@ -239,40 +239,47 @@ test('Should collect metrics for database', async () => {
 
 test('Should collect metrics for client sdk versions', async () => {
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-node:3.2.5',
+        sdkName: 'unleash-client-node',
+        sdkVersion: '3.2.5',
     });
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-node:3.2.5',
+        sdkName: 'unleash-client-node',
+        sdkVersion: '3.2.5',
     });
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-node:3.2.5',
+        sdkName: 'unleash-client-node',
+        sdkVersion: '3.2.5',
     });
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-java:5.0.0',
+        sdkName: 'unleash-client-java',
+        sdkVersion: '5.0.0',
     });
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-java:5.0.0',
+        sdkName: 'unleash-client-java',
+        sdkVersion: '5.0.0',
     });
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-java:5.0.0',
+        sdkName: 'unleash-client-java',
+        sdkVersion: '5.0.0',
     });
     const metrics = await prometheusRegister.getSingleMetricAsString(
         'client_sdk_versions',
     );
     expect(metrics).toMatch(
-        /client_sdk_versions\{sdk_name="unleash-client-node",sdk_version="3\.2\.5"\} 3/,
+        /client_sdk_versions\{sdk_name="unleash-client-node",sdk_version="3\.2\.5"\,platformName=\"not-set\",platformVersion=\"not-set\",yggdrasilVersion=\"not-set\",specVersion=\"not-set\"} 3/,
     );
     expect(metrics).toMatch(
-        /client_sdk_versions\{sdk_name="unleash-client-java",sdk_version="5\.0\.0"\} 3/,
+        /client_sdk_versions\{sdk_name="unleash-client-java",sdk_version="5\.0\.0"\,platformName=\"not-set\",platformVersion=\"not-set\",yggdrasilVersion=\"not-set\",specVersion=\"not-set\"} 3/,
     );
     eventStore.emit(CLIENT_REGISTER, {
-        sdkVersion: 'unleash-client-node:3.2.5',
+        sdkName: 'unleash-client-node',
+        sdkVersion: '3.2.5',
     });
     const newmetrics = await prometheusRegister.getSingleMetricAsString(
         'client_sdk_versions',
     );
     expect(newmetrics).toMatch(
-        /client_sdk_versions\{sdk_name="unleash-client-node",sdk_version="3\.2\.5"\} 4/,
+        /client_sdk_versions\{sdk_name="unleash-client-node",sdk_version="3\.2\.5"\,platformName=\"not-set\",platformVersion=\"not-set\",yggdrasilVersion=\"not-set\",specVersion=\"not-set\"} 4/,
     );
 });
 
diff --git a/src/lib/metrics.ts b/src/lib/metrics.ts
index 18e1ea04b1..cae55b2624 100644
--- a/src/lib/metrics.ts
+++ b/src/lib/metrics.ts
@@ -24,7 +24,7 @@ import type { IUnleashConfig } from './types/option';
 import type { ISettingStore, IUnleashStores } from './types/stores';
 import { hoursToMilliseconds, minutesToMilliseconds } from 'date-fns';
 import type { InstanceStatsService } from './features/instance-stats/instance-stats-service';
-import type { IEnvironment } from './types';
+import type { IEnvironment, ISdkHeartbeat } from './types';
 import {
     createCounter,
     createGauge,
@@ -51,6 +51,7 @@ export default class MetricsMonitor {
         }
 
         const { eventStore, environmentStore } = stores;
+        const { flagResolver } = config;
 
         const cachedEnvironments: () => Promise<IEnvironment[]> = memoizee(
             async () => environmentStore.getAll(),
@@ -244,7 +245,14 @@ export default class MetricsMonitor {
         const clientSdkVersionUsage = createCounter({
             name: 'client_sdk_versions',
             help: 'Which sdk versions are being used',
-            labelNames: ['sdk_name', 'sdk_version'],
+            labelNames: [
+                'sdk_name',
+                'sdk_version',
+                'platformName',
+                'platformVersion',
+                'yggdrasilVersion',
+                'specVersion',
+            ],
         });
 
         const productionChanges30 = createGauge({
@@ -784,15 +792,36 @@ export default class MetricsMonitor {
             }
         });
 
-        eventStore.on(CLIENT_REGISTER, (m) => {
-            if (m.sdkVersion && m.sdkVersion.indexOf(':') > -1) {
-                const [sdkName, sdkVersion] = m.sdkVersion.split(':');
+        eventStore.on(CLIENT_REGISTER, (heartbeatEvent: ISdkHeartbeat) => {
+            if (!heartbeatEvent.sdkName || !heartbeatEvent.sdkVersion) {
+                return;
+            }
+
+            if (flagResolver.isEnabled('extendedMetrics')) {
                 clientSdkVersionUsage.increment({
-                    sdk_name: sdkName,
-                    sdk_version: sdkVersion,
+                    sdk_name: heartbeatEvent.sdkName,
+                    sdk_version: heartbeatEvent.sdkVersion,
+                    platformName:
+                        heartbeatEvent.metadata?.platformName ?? 'not-set',
+                    platformVersion:
+                        heartbeatEvent.metadata?.platformVersion ?? 'not-set',
+                    yggdrasilVersion:
+                        heartbeatEvent.metadata?.yggdrasilVersion ?? 'not-set',
+                    specVersion:
+                        heartbeatEvent.metadata?.specVersion ?? 'not-set',
+                });
+            } else {
+                clientSdkVersionUsage.increment({
+                    sdk_name: heartbeatEvent.sdkName,
+                    sdk_version: heartbeatEvent.sdkVersion,
+                    platformName: 'not-set',
+                    platformVersion: 'not-set',
+                    yggdrasilVersion: 'not-set',
+                    specVersion: 'not-set',
                 });
             }
         });
+
         eventStore.on(PROJECT_ENVIRONMENT_REMOVED, ({ project }) => {
             projectEnvironmentsDisabled.increment({ project_id: project });
         });
diff --git a/src/lib/openapi/spec/client-application-schema.ts b/src/lib/openapi/spec/client-application-schema.ts
index df73d8e827..b7e4f3d0dc 100644
--- a/src/lib/openapi/spec/client-application-schema.ts
+++ b/src/lib/openapi/spec/client-application-schema.ts
@@ -30,6 +30,30 @@ export const clientApplicationSchema = {
             type: 'string',
             example: 'development',
         },
+        platformName: {
+            description:
+                'The platform the application is running on. For languages that compile to binaries, this can be omitted',
+            type: 'string',
+            example: '.NET Core',
+        },
+        platformVersion: {
+            description:
+                'The version of the platform the application is running on. Languages that compile to binaries, this is expected to be the compiler version used to assemble the binary.',
+            type: 'string',
+            example: '3.1',
+        },
+        yggdrasilVersion: {
+            description:
+                'The semantic version of the Yggdrasil engine used by the client. If the client is using a native engine this can be omitted.',
+            type: 'string',
+            example: '1.0.0',
+        },
+        specVersion: {
+            description:
+                'The version of the Unleash client specification the client supports',
+            type: 'string',
+            example: '3.0.0',
+        },
         interval: {
             type: 'number',
             description:
diff --git a/src/lib/openapi/spec/client-metrics-schema.ts b/src/lib/openapi/spec/client-metrics-schema.ts
index c41f073284..1c2d864291 100644
--- a/src/lib/openapi/spec/client-metrics-schema.ts
+++ b/src/lib/openapi/spec/client-metrics-schema.ts
@@ -21,9 +21,41 @@ export const clientMetricsSchema = {
             example: 'application-name-dacb1234',
         },
         environment: {
-            description: 'Which environment the application is running in',
+            description:
+                'Which environment the application is running in. This property was deprecated in v5. This can be determined by the API key calling this endpoint.',
             type: 'string',
             example: 'development',
+            deprecated: true,
+        },
+        sdkVersion: {
+            type: 'string',
+            description:
+                'An SDK version identifier. Usually formatted as "unleash-client-<language>:<version>"',
+            example: 'unleash-client-java:7.0.0',
+        },
+        platformName: {
+            description:
+                'The platform the application is running on. For languages that compile to binaries, this can be omitted',
+            type: 'string',
+            example: '.NET Core',
+        },
+        platformVersion: {
+            description:
+                'The version of the platform the application is running on. Languages that compile to binaries, this is expected to be the compiler version used to assemble the binary.',
+            type: 'string',
+            example: '3.1',
+        },
+        yggdrasilVersion: {
+            description:
+                'The semantic version of the Yggdrasil engine used by the client. If the client is using a native engine this can be omitted.',
+            type: 'string',
+            example: '1.0.0',
+        },
+        specVersion: {
+            description:
+                'The version of the Unleash client specification the client supports',
+            type: 'string',
+            example: '3.0.0',
         },
         bucket: {
             type: 'object',
diff --git a/src/lib/types/experimental.ts b/src/lib/types/experimental.ts
index 2cd77e1604..4d2097d30a 100644
--- a/src/lib/types/experimental.ts
+++ b/src/lib/types/experimental.ts
@@ -62,7 +62,8 @@ export type IFlagKey =
     | 'commandBarUI'
     | 'flagCreator'
     | 'anonymizeProjectOwners'
-    | 'resourceLimits';
+    | 'resourceLimits'
+    | 'extendedMetrics';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -299,6 +300,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_RESOURCE_LIMITS,
         false,
     ),
+    extendedMetrics: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_EXTENDED_METRICS,
+        false,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {
diff --git a/src/lib/types/model.ts b/src/lib/types/model.ts
index e3529d04a9..d66fc87863 100644
--- a/src/lib/types/model.ts
+++ b/src/lib/types/model.ts
@@ -451,6 +451,10 @@ export interface IClientApp {
     icon?: string;
     description?: string;
     color?: string;
+    platformName?: string;
+    platformVersion?: string;
+    yggdrasilVersion?: string;
+    specVersion?: string;
 }
 
 export interface IAppFeature {
@@ -598,3 +602,16 @@ export interface IUserAccessOverview {
     rootRole: string;
     groupProjects: string[];
 }
+
+export interface ISdkHeartbeat {
+    sdkVersion: string;
+    sdkName: string;
+    metadata: ISdkHeartbeatMetadata;
+}
+
+export interface ISdkHeartbeatMetadata {
+    platformName?: string;
+    platformVersion?: string;
+    yggdrasilVersion?: string;
+    specVersion?: string;
+}
diff --git a/src/server-dev.ts b/src/server-dev.ts
index 9d8638748b..6dd12fcf6c 100644
--- a/src/server-dev.ts
+++ b/src/server-dev.ts
@@ -55,6 +55,7 @@ process.nextTick(async () => {
                         commandBarUI: true,
                         flagCreator: true,
                         resourceLimits: true,
+                        extendedMetrics: true,
                     },
                 },
                 authentication: {