diff --git a/backend/src/federation/client/1_0/FederationClient.ts b/backend/src/federation/client/1_0/FederationClient.ts
index 52964e789..1593d3ed2 100644
--- a/backend/src/federation/client/1_0/FederationClient.ts
+++ b/backend/src/federation/client/1_0/FederationClient.ts
@@ -8,39 +8,39 @@ import { gql } from 'graphql-request'
 import { GraphQLGetClient } from '@/federation/client/GraphQLGetClient'
 import { backendLogger as logger } from '@/server/logger'
 
-export async function requestGetPublicKey(
-  dbCom: DbFederatedCommunity,
-): Promise<string | undefined> {
-  let endpoint = dbCom.endPoint.endsWith('/') ? dbCom.endPoint : dbCom.endPoint + '/'
-  endpoint = `${endpoint}${dbCom.apiVersion}/`
-  logger.info(`requestGetPublicKey with endpoint='${endpoint}'...`)
+export class FederationClient {
+  public async requestGetPublicKey(dbCom: DbFederatedCommunity): Promise<string | undefined> {
+    let endpoint = dbCom.endPoint.endsWith('/') ? dbCom.endPoint : dbCom.endPoint + '/'
+    endpoint = `${endpoint}${dbCom.apiVersion}/`
+    logger.info(`requestGetPublicKey with endpoint='${endpoint}'...`)
 
-  const graphQLClient = GraphQLGetClient.getInstance(endpoint)
-  logger.debug(`graphQLClient=${JSON.stringify(graphQLClient)}`)
-  const query = gql`
-    query {
-      getPublicKey {
-        publicKey
+    const graphQLClient = GraphQLGetClient.getInstance(endpoint)
+    logger.debug(`graphQLClient=${JSON.stringify(graphQLClient)}`)
+    const query = gql`
+      query {
+        getPublicKey {
+          publicKey
+        }
       }
+    `
+    const variables = {}
+    try {
+      const { data, errors, extensions, headers, status } = await graphQLClient.rawRequest(
+        query,
+        variables,
+      )
+      logger.debug(`Response-Data:`, data, errors, extensions, headers, status)
+      if (data) {
+        logger.debug(`Response-PublicKey:`, data.getPublicKey.publicKey)
+        logger.info(`requestGetPublicKey processed successfully`)
+        return data.getPublicKey.publicKey
+      }
+      logger.warn(`requestGetPublicKey processed without response data`)
+    } catch (err) {
+      if (err instanceof GraphQLError) {
+        logger.error(`RawRequest-Error on ${endpoint} with message ${err.message}`)
+      }
+      throw new Error(`Request-Error in requestGetPublicKey.`)
     }
-  `
-  const variables = {}
-  try {
-    const { data, errors, extensions, headers, status } = await graphQLClient.rawRequest(
-      query,
-      variables,
-    )
-    logger.debug(`Response-Data:`, data, errors, extensions, headers, status)
-    if (data) {
-      logger.debug(`Response-PublicKey:`, data.getPublicKey.publicKey)
-      logger.info(`requestGetPublicKey processed successfully`)
-      return data.getPublicKey.publicKey
-    }
-    logger.warn(`requestGetPublicKey processed without response data`)
-  } catch (err) {
-    if (err instanceof GraphQLError) {
-      logger.error(`RawRequest-Error on ${endpoint} with message ${err.message}`)
-    }
-    throw new Error(`Request-Error in requestGetPublicKey.`)
   }
 }
diff --git a/backend/src/federation/client/1_1/FederationClient.ts b/backend/src/federation/client/1_1/FederationClient.ts
index c91ebb856..eeb0ebe3f 100644
--- a/backend/src/federation/client/1_1/FederationClient.ts
+++ b/backend/src/federation/client/1_1/FederationClient.ts
@@ -2,45 +2,16 @@
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-import { GraphQLError } from 'graphql'
-import { gql } from 'graphql-request'
 
-import { GraphQLGetClient } from '@/federation/client/GraphQLGetClient'
-import { backendLogger as logger } from '@/server/logger'
+import { FederationClient as FedClient } from '@/federation/client/1_0/FederationClient'
+// import { GraphQLError } from 'graphql'
+// import { gql } from 'graphql-request'
 
-export async function requestGetPublicKey(
-  dbCom: DbFederatedCommunity,
-): Promise<string | undefined> {
-  let endpoint = dbCom.endPoint.endsWith('/') ? dbCom.endPoint : dbCom.endPoint + '/'
-  endpoint = `${endpoint}${dbCom.apiVersion}/`
-  logger.info(`requestGetPublicKey with endpoint='${endpoint}'...`)
+// import { GraphQLGetClient } from '@/federation/client/GraphQLGetClient'
+// import { backendLogger as logger } from '@/server/logger'
 
-  const graphQLClient = GraphQLGetClient.getInstance(endpoint)
-  logger.debug(`graphQLClient=${JSON.stringify(graphQLClient)}`)
-  const query = gql`
-    query {
-      getPublicKey {
-        publicKey
-      }
-    }
-  `
-  const variables = {}
-  try {
-    const { data, errors, extensions, headers, status } = await graphQLClient.rawRequest(
-      query,
-      variables,
-    )
-    logger.debug(`Response-Data:`, data, errors, extensions, headers, status)
-    if (data) {
-      logger.debug(`Response-PublicKey:`, data.getPublicKey.publicKey)
-      logger.info(`requestGetPublicKey processed successfully`)
-      return data.getPublicKey.publicKey
-    }
-    logger.warn(`requestGetPublicKey processed without response data`)
-  } catch (err) {
-    if (err instanceof GraphQLError) {
-      logger.error(`RawRequest-Error on ${endpoint} with message ${err.message}`)
-    }
-    throw new Error(`Request-Error in requestGetPublicKey`) // :${err}`)
+export class FederationClient {
+  async requestGetPublicKey(dbCom: DbFederatedCommunity): Promise<string | undefined> {
+    return await new FedClient().requestGetPublicKey(dbCom)
   }
 }
diff --git a/backend/src/federation/validateCommunities.ts b/backend/src/federation/validateCommunities.ts
index 52e258a53..34bcaa1f2 100644
--- a/backend/src/federation/validateCommunities.ts
+++ b/backend/src/federation/validateCommunities.ts
@@ -6,9 +6,9 @@ import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCom
 import { backendLogger as logger } from '@/server/logger'
 
 // eslint-disable-next-line camelcase
-import { requestGetPublicKey as v1_0_requestGetPublicKey } from './client/1_0/FederationClient'
+import { FederationClient as FederationClient_V1_0 } from './client/1_0/FederationClient'
 // eslint-disable-next-line camelcase
-import { requestGetPublicKey as v1_1_requestGetPublicKey } from './client/1_1/FederationClient'
+import { FederationClient as FederationClient_V1_1 } from './client/1_1/FederationClient'
 import { ApiVersionType } from './enum/apiVersionType'
 
 export function startValidateCommunities(timerInterval: number): void {
@@ -75,9 +75,9 @@ async function invokeVersionedRequestGetPublicKey(
 ): Promise<string | undefined> {
   switch (dbCom.apiVersion) {
     case ApiVersionType.V1_0:
-      return v1_0_requestGetPublicKey(dbCom)
+      return new FederationClient_V1_0().requestGetPublicKey(dbCom)
     case ApiVersionType.V1_1:
-      return v1_1_requestGetPublicKey(dbCom)
+      return new FederationClient_V1_1().requestGetPublicKey(dbCom)
     default:
       return undefined
   }