diff --git a/backend/src/helpers/serviceTokenData.ts b/backend/src/helpers/serviceTokenData.ts
index 8616ba237..9a8bb1288 100644
--- a/backend/src/helpers/serviceTokenData.ts
+++ b/backend/src/helpers/serviceTokenData.ts
@@ -1,9 +1,94 @@
 import { Types } from 'mongoose';
 import {
     ISecret,
-    IServiceTokenData
+    IServiceTokenData,
+    ServiceTokenData,
+    IUser,
+    User,
+    IServiceAccount,
+    ServiceAccount,
 } from '../models';
-import { UnauthorizedRequestError } from '../utils/errors';
+import { 
+    UnauthorizedRequestError,
+    ServiceTokenDataNotFoundError
+} from '../utils/errors';
+import {
+    AUTH_MODE_JWT,
+	AUTH_MODE_SERVICE_ACCOUNT,
+	AUTH_MODE_SERVICE_TOKEN,
+	AUTH_MODE_API_KEY
+} from '../variables';
+import { validateUserClientForWorkspace } from '../helpers/user';
+import { validateServiceAccountClientForWorkspace } from '../helpers/serviceAccount';
+
+/**
+ * Validate authenticated clients for service token with id [serviceTokenId] based
+ * on any known permissions.
+ * @param {Object} obj
+ * @param {Object} obj.authData - authenticated client details
+ * @param {Types.ObjectId} obj.serviceTokenData - id of service token to validate against
+ * @param {Array<'admin' | 'member'>} obj.acceptedRoles - accepted workspace roles
+ */
+const validateClientForServiceTokenData = async ({
+    authData,
+    serviceTokenDataId,
+    acceptedRoles
+}: {
+    authData: {
+		authMode: string;
+		authPayload: IUser | IServiceAccount | IServiceTokenData;
+	};
+    serviceTokenDataId: Types.ObjectId;
+    acceptedRoles: Array<'admin' | 'member'>;
+}) => {
+    const serviceTokenData = await ServiceTokenData
+            .findById(serviceTokenDataId)
+            .select('+encryptedKey +iv +tag')
+            .populate<{ user: IUser }>('user');
+
+    if (!serviceTokenData) throw ServiceTokenDataNotFoundError({
+        message: 'Failed to find service token data'
+    });
+
+    if (authData.authMode === AUTH_MODE_JWT && authData.authPayload instanceof User) {
+        await validateUserClientForWorkspace({
+            user: authData.authPayload,
+            workspaceId: serviceTokenData.workspace,
+            acceptedRoles
+        });
+        
+        return serviceTokenData;
+    }
+
+    if (authData.authMode === AUTH_MODE_SERVICE_ACCOUNT && authData.authPayload instanceof ServiceAccount) {
+        await validateServiceAccountClientForWorkspace({
+            serviceAccount: authData.authPayload,
+            workspaceId: serviceTokenData.workspace
+        });
+        
+        return serviceTokenData;
+    }
+
+    if (authData.authMode === AUTH_MODE_SERVICE_TOKEN && authData.authPayload instanceof ServiceTokenData) {
+        throw UnauthorizedRequestError({
+            message: 'Failed service token authorization for service token data'
+        });
+    }
+
+    if (authData.authMode === AUTH_MODE_API_KEY && authData.authPayload instanceof User) {
+        await validateUserClientForWorkspace({
+            user: authData.authPayload,
+            workspaceId: serviceTokenData.workspace,
+            acceptedRoles
+        });
+        
+        return serviceTokenData;
+    }
+    
+    throw UnauthorizedRequestError({
+        message: 'Failed client authorization for service token data'
+    });
+}
 
 /**
  * Validate that service token (client) can access workspace
@@ -98,6 +183,7 @@ import { UnauthorizedRequestError } from '../utils/errors';
 }
 
 export {
+    validateClientForServiceTokenData,
     validateServiceTokenDataClientForWorkspace,
     validateServiceTokenDataClientForSecrets
 }
\ No newline at end of file
diff --git a/backend/src/middleware/requireServiceTokenDataAuth.ts b/backend/src/middleware/requireServiceTokenDataAuth.ts
index f474e23c0..7715991ba 100644
--- a/backend/src/middleware/requireServiceTokenDataAuth.ts
+++ b/backend/src/middleware/requireServiceTokenDataAuth.ts
@@ -1,5 +1,7 @@
 import { Request, Response, NextFunction } from 'express';
+import { Types } from 'mongoose';
 import { ServiceToken, ServiceTokenData } from '../models';
+import { validateClientForServiceTokenData } from '../helpers/serviceTokenData';
 import { validateMembership } from '../helpers/membership';
 import { AccountNotFoundError, UnauthorizedRequestError } from '../utils/errors';
 
@@ -14,25 +16,12 @@ const requireServiceTokenDataAuth = ({
 }) => {
     return async (req: Request, res: Response, next: NextFunction) => {
         const { serviceTokenDataId } = req[location];
-
-        const serviceTokenData = await ServiceTokenData
-            .findById(req[location].serviceTokenDataId)
-            .select('+encryptedKey +iv +tag').populate('user');
-
-        if (!serviceTokenData) {
-            return next(AccountNotFoundError({ message: 'Failed to locate service token data' }));
-        }
-
-        if (req.user) {
-            // case: jwt auth
-            await validateMembership({
-                userId: req.user._id,
-                workspaceId: serviceTokenData.workspace,
-                acceptedRoles
-            });
-        }
-
-        req.serviceTokenData = serviceTokenData;
+        
+        req.serviceTokenData = await validateClientForServiceTokenData({
+            authData: req.authData,
+            serviceTokenDataId: new Types.ObjectId(serviceTokenDataId),
+            acceptedRoles
+        });
 
         next();
     }