diff --git a/src/__data__/api/api.ts b/src/__data__/api/api.ts
index 41b0821..90a649d 100644
--- a/src/__data__/api/api.ts
+++ b/src/__data__/api/api.ts
@@ -17,6 +17,11 @@ const normalizeBaseUrl = (url: string) => (url.endsWith('/') ? url.slice(0, -1)
 const backendBaseUrl = normalizeBaseUrl(getConfigValue('challenge.api'))
 const challengeBaseUrl = `${backendBaseUrl}/challenge`
 
+interface ApiResponse<T> {
+  success: boolean
+  body: T
+}
+
 export const api = createApi({
   reducerPath: 'challengeApi',
   baseQuery: fetchBaseQuery({
@@ -34,12 +39,14 @@ export const api = createApi({
         method: 'POST',
         body,
       }),
+      transformResponse: (response: ApiResponse<ChallengeAuthResponse>) => response.body,
     }),
     getChains: builder.query<ChallengeChain[], void>({
       query: () => ({
         url: '/chains',
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<ChallengeChain[]>) => response.body,
       providesTags: ['Chains'],
     }),
     getChain: builder.query<ChallengeChain, string>({
@@ -47,6 +54,7 @@ export const api = createApi({
         url: `/chain/${chainId}`,
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<ChallengeChain>) => response.body,
       providesTags: (_result, _error, arg) => [{ type: 'Chain', id: arg }],
     }),
     submitSolution: builder.mutation<ChallengeSubmitResponse, ChallengeSubmitPayload>({
@@ -55,6 +63,7 @@ export const api = createApi({
         method: 'POST',
         body,
       }),
+      transformResponse: (response: ApiResponse<ChallengeSubmitResponse>) => response.body,
       invalidatesTags: ['Queue', 'Submissions', 'UserStats'],
     }),
     checkQueueStatus: builder.query<QueueStatus, string>({
@@ -62,6 +71,7 @@ export const api = createApi({
         url: `/check-status/${queueId}`,
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<QueueStatus>) => response.body,
       providesTags: (_result, _error, arg) => [{ type: 'Queue', id: arg }],
     }),
     getUserStats: builder.query<UserStats, string>({
@@ -69,6 +79,7 @@ export const api = createApi({
         url: `/user/${userId}/stats`,
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<UserStats>) => response.body,
       providesTags: (_result, _error, arg) => [{ type: 'UserStats', id: arg }],
     }),
     getUserSubmissions: builder.query<ChallengeSubmission[], { userId: string; taskId?: string }>({
@@ -76,6 +87,7 @@ export const api = createApi({
         url: `/user/${userId}/submissions${taskId ? `?taskId=${taskId}` : ''}`,
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<ChallengeSubmission[]>) => response.body,
       providesTags: (_result, _error, arg) => [{ type: 'Submissions', id: arg.userId }],
     }),
     getSystemStats: builder.query<SystemStats, void>({
@@ -83,6 +95,7 @@ export const api = createApi({
         url: '/stats',
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<SystemStats>) => response.body,
       providesTags: ['SystemStats'],
     }),
     getTask: builder.query<ChallengeTask, string>({
@@ -90,6 +103,7 @@ export const api = createApi({
         url: `/task/${taskId}`,
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<ChallengeTask>) => response.body,
       providesTags: (_result, _error, arg) => [{ type: 'Submissions', id: `task-${arg}` }],
     }),
     getAllSubmissions: builder.query<ChallengeSubmission[], void>({
@@ -97,6 +111,7 @@ export const api = createApi({
         url: '/submissions',
         method: 'GET',
       }),
+      transformResponse: (response: ApiResponse<ChallengeSubmission[]>) => response.body,
       providesTags: ['Submissions'],
     }),
   }),