diff --git a/src/services/api/api.service.js b/src/services/api/api.service.js
index 93556116..1673d837 100644
--- a/src/services/api/api.service.js
+++ b/src/services/api/api.service.js
@@ -367,19 +367,27 @@ const fetchMutes = ({credentials}) => {
   }).then((data) => data.json())
 }
 
-const joinGroup = ({id, credentials}) => {
-  const url = `${GROUP_JOINING_URL}/id.json`
+const fetchGroup = ({ groupName }) => {
+  const url = `${GROUP_URL}/${groupName}.json`
+
+  return fetch(url).then((data) => data.json())
+}
+
+const joinGroup = ({groupName, credentials}) => {
+  const url = `${GROUP_JOINING_URL}/${groupName}.json`
 
   return fetch(url, {
-    headers: authHeaders(credentials)
+    headers: authHeaders(credentials),
+    method: 'POST'
   }).then((data) => data.json())
 }
 
-const leaveGroup = ({id, credentials}) => {
-  const url = `${GROUP_LEAVING_URL}/id.json`
+const leaveGroup = ({groupName, credentials}) => {
+  const url = `${GROUP_LEAVING_URL}/${groupName}.json`
 
   return fetch(url, {
-    headers: authHeaders(credentials)
+    headers: authHeaders(credentials),
+    method: 'POST'
   }).then((data) => data.json())
 }
 
@@ -406,8 +414,14 @@ const fetchMemberships = ({id, credentials}) => {
   }).then((data) => data.json())
 }
 
-const fetchMembers = (id) => {
-  const url = `${GROUP_MEMBERS_URL}/${id}.json`
+const fetchMembers = ({ groupName }) => {
+  const url = `${GROUP_MEMBERS_URL}/${groupName}.json`
+
+  return fetch(url).then((data) => data.json())
+}
+
+const fetchIsMember = ({id, groupName}) => {
+  const url = `${GROUP_IS_MEMBER_URL}?user_id=${id}&group_name=${groupName}`
 
   return fetch(url).then((data) => data.json())
 }
@@ -439,11 +453,13 @@ const apiService = {
   updateProfile,
   updateBanner,
   externalProfile,
+  fetchGroup,
   joinGroup,
   leaveGroup,
   createGroup,
   fetchMemberships,
-  fetchMembers
+  fetchMembers,
+  fetchIsMember
 }
 
 export default apiService
diff --git a/src/services/backend_interactor_service/backend_interactor_service.js b/src/services/backend_interactor_service/backend_interactor_service.js
index c2f19bde..c95b2319 100644
--- a/src/services/backend_interactor_service/backend_interactor_service.js
+++ b/src/services/backend_interactor_service/backend_interactor_service.js
@@ -50,20 +50,28 @@ const backendInteractorService = (credentials) => {
     return apiService.setUserMute({id, muted, credentials})
   }
 
-  const joinGroup = (id) => {
-    return apiService.joinGroup({id, credentials})
+  const fetchGroup = ({ groupName }) => {
+    return apiService.fetchGroup({ groupName })
   }
 
-  const leaveGroup = (id) => {
-    return apiService.leaveGroup({id, credentials})
+  const joinGroup = ({ groupName }) => {
+    return apiService.joinGroup({groupName, credentials})
   }
 
-  const fetchMemberships = (id) => {
+  const leaveGroup = ({ groupName }) => {
+    return apiService.leaveGroup({groupName, credentials})
+  }
+
+  const fetchMemberships = ({ id }) => {
     return apiService.fetchMemberships({id, credentials})
   }
 
-  const fetchMembers = (id) => {
-    return apiService.fetchMemberships({id, credentials})
+  const fetchMembers = ({ groupName }) => {
+    return apiService.fetchMembers({ groupName })
+  }
+
+  const fetchIsMember = ({id, groupName}) => {
+    return apiService.fetchIsMember({id, groupName})
   }
 
   const createGroup = (params) => apiService.createGroup({params, credentials})
@@ -99,11 +107,13 @@ const backendInteractorService = (credentials) => {
     updateBanner,
     updateProfile,
     externalProfile,
+    fetchGroup,
     joinGroup,
     leaveGroup,
     createGroup,
     fetchMemberships,
-    fetchMembers
+    fetchMembers,
+    fetchIsMember
   }
 
   return backendInteractorServiceInstance