diff --git a/web/src/containers/Main/context.ts b/web/src/containers/Main/context.ts
index 8f81abf3..c91f4178 100644
--- a/web/src/containers/Main/context.ts
+++ b/web/src/containers/Main/context.ts
@@ -1,6 +1,18 @@
 import { createContext } from 'react';
 import { QRFormWrapper } from 'web/src/components/QRFormWrapper';
+import { RemoteDataResult } from '@beda.software/remote-data';
 
+import { Parameters, Questionnaire, QuestionnaireResponse } from "fhir/r4b";
 import { QRFWrapper } from './types';
+import { assemble, populate } from 'src/services/sdc';
+
+type AssembleService = (qId:string) => Promise<RemoteDataResult<Questionnaire>>
+type PopulateService = (launchContext:Parameters) => Promise<RemoteDataResult<QuestionnaireResponse>>
+
+interface SDCContextType {
+    assemble: AssembleService
+    populate: PopulateService
+}
 
 export const FormRenderContext = createContext<QRFWrapper>(QRFormWrapper);
+export const SDCContext = createContext<SDCContextType>({ assemble, populate })
diff --git a/web/src/containers/Main/useMain.ts b/web/src/containers/Main/useMain.ts
index 26435146..109b90c4 100644
--- a/web/src/containers/Main/useMain.ts
+++ b/web/src/containers/Main/useMain.ts
@@ -1,12 +1,11 @@
 import {
     Questionnaire,
-    QuestionnaireResponse,
     Parameters,
     ParametersParameter,
     Bundle,
     FhirResource,
 } from 'fhir/r4b';
-import { useCallback, useState } from 'react';
+import { useCallback, useContext, useState } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { toast } from 'react-toastify';
 import { generateMappingService, generateQuestionnaireService } from 'web/src/services/builder';
@@ -36,6 +35,7 @@ import { formatError } from '@beda.software/fhir-react';
 import { Mapping } from 'shared/src/contrib/aidbox';
 
 import { getMappings, makeMappingExtension } from './utils';
+import { SDCContext } from './context';
 
 export function useLaunchContext() {
     const [launchContext, setLaunchContext] = useState<Parameters>({
@@ -65,6 +65,7 @@ export function useLaunchContext() {
 
 export function useMain(questionnaireId: string) {
     const navigate = useNavigate();
+    const {assemble, populate} = useContext(SDCContext)
     const { launchContext, setLaunchContext, clearLaunchContext } = useLaunchContext();
 
     const [mappingRD, setMappingRD] = useState<RemoteData<WithId<Mapping>>>(notAsked);
@@ -104,14 +105,9 @@ export function useMain(questionnaireId: string) {
         return response;
     }, [questionnaireId]);
 
-    const [assembledQuestionnaireRD, assembledQuestionnaireRDManager] = useService(async () => {
-        const response = await service<Questionnaire>({
-            method: 'GET',
-            url: `Questionnaire/${questionnaireId}/$assemble`,
-        });
-
-        return response;
-    }, [questionnaireId]);
+    const [assembledQuestionnaireRD, assembledQuestionnaireRDManager] = useService(
+        () => assemble(questionnaireId),
+        [questionnaireId, assemble]);
 
     const reloadQuestionnaire = useCallback(async () => {
         originalQuestionnaireRDManager.reload();
@@ -180,15 +176,9 @@ export function useMain(questionnaireId: string) {
         [saveQuestionnaire, navigate],
     );
 
-    const [questionnaireResponseRD, questionnaireResponseRDManager] = useService(async () => {
-        const response = await service<QuestionnaireResponse>({
-            method: 'POST',
-            url: '/Questionnaire/$populate',
-            data: launchContext,
-        });
-
-        return response;
-    }, [launchContext]);
+    const [questionnaireResponseRD, questionnaireResponseRDManager] = useService(
+        () => populate(launchContext),
+        [launchContext, populate]);
 
     const createMapping = useCallback(
         async (mapping: Mapping) => {
diff --git a/web/src/services/sdc.ts b/web/src/services/sdc.ts
new file mode 100644
index 00000000..934f9b2e
--- /dev/null
+++ b/web/src/services/sdc.ts
@@ -0,0 +1,20 @@
+import { Parameters, Questionnaire, QuestionnaireResponse } from "fhir/r4b";
+import { service } from "./fhir";
+
+export async function populate(launchContext:Parameters) {
+    const response = await service<QuestionnaireResponse>({
+        method: 'POST',
+        url: '/Questionnaire/$populate',
+        data: launchContext,
+    });
+    return response;
+}
+
+export async function assemble(questionnaireId:string){
+    const response = await service<Questionnaire>({
+        method: 'GET',
+        url: `Questionnaire/${questionnaireId}/$assemble`,
+    });
+
+    return response;
+}