diff --git a/src/models/data/collectionData.ts b/src/models/data/collectionData.ts
index ff226d315ed..5d49ae2389c 100644
--- a/src/models/data/collectionData.ts
+++ b/src/models/data/collectionData.ts
@@ -1,4 +1,4 @@
-import { CollectionResponse } from '../response/collectionResponse';
+import { CollectionDetailsResponse } from '../response/collectionResponse';
 
 export class CollectionData {
     id: string;
@@ -6,7 +6,7 @@ export class CollectionData {
     name: string;
     readOnly: boolean;
 
-    constructor(response: CollectionResponse) {
+    constructor(response: CollectionDetailsResponse) {
         this.id = response.id;
         this.organizationId = response.organizationId;
         this.name = response.name;
diff --git a/src/models/request/collectionRequest.ts b/src/models/request/collectionRequest.ts
index 38e62a449f3..e5f427624b8 100644
--- a/src/models/request/collectionRequest.ts
+++ b/src/models/request/collectionRequest.ts
@@ -1,7 +1,10 @@
 import { Collection } from '../domain/collection';
 
+import { SelectionReadOnlyRequest } from './selectionReadOnlyRequest';
+
 export class CollectionRequest {
     name: string;
+    groups: SelectionReadOnlyRequest[] = [];
 
     constructor(collection: Collection) {
         this.name = collection.name ? collection.name.encryptedString : null;
diff --git a/src/models/request/groupRequest.ts b/src/models/request/groupRequest.ts
new file mode 100644
index 00000000000..d3e18cf1d75
--- /dev/null
+++ b/src/models/request/groupRequest.ts
@@ -0,0 +1,8 @@
+import { SelectionReadOnlyRequest } from './selectionReadOnlyRequest';
+
+export class GroupRequest {
+    name: string;
+    accessAll: boolean;
+    externalId: string;
+    collections: SelectionReadOnlyRequest[] = [];
+}
diff --git a/src/models/request/selectionReadOnlyRequest.ts b/src/models/request/selectionReadOnlyRequest.ts
new file mode 100644
index 00000000000..e947b0a3644
--- /dev/null
+++ b/src/models/request/selectionReadOnlyRequest.ts
@@ -0,0 +1,9 @@
+export class SelectionReadOnlyRequest {
+    id: string;
+    readOnly: boolean;
+
+    constructor(id: string, readOnly: boolean) {
+        this.id = id;
+        this.readOnly = readOnly;
+    }
+}
diff --git a/src/models/response/collectionResponse.ts b/src/models/response/collectionResponse.ts
index 525bf60e34e..d04304b785a 100644
--- a/src/models/response/collectionResponse.ts
+++ b/src/models/response/collectionResponse.ts
@@ -1,13 +1,33 @@
+import { SelectionReadOnlyResponse } from './selectionReadOnlyResponse';
+
 export class CollectionResponse {
     id: string;
     organizationId: string;
     name: string;
-    readOnly: boolean;
 
     constructor(response: any) {
         this.id = response.Id;
         this.organizationId = response.OrganizationId;
         this.name = response.Name;
+    }
+}
+
+export class CollectionDetailsResponse extends CollectionResponse {
+    readOnly: boolean;
+
+    constructor(response: any) {
+        super(response);
         this.readOnly = response.ReadOnly || false;
     }
 }
+
+export class CollectionGroupDetailsResponse extends CollectionResponse {
+    groups: SelectionReadOnlyResponse[] = [];
+
+    constructor(response: any) {
+        super(response);
+        if (response.Groups != null) {
+            this.groups = response.Collections.map((g: any) => new SelectionReadOnlyResponse(g));
+        }
+    }
+}
diff --git a/src/models/response/collectionUserResponse.ts b/src/models/response/collectionUserResponse.ts
new file mode 100644
index 00000000000..ea36e473e6b
--- /dev/null
+++ b/src/models/response/collectionUserResponse.ts
@@ -0,0 +1,22 @@
+import { OrganizationUserStatusType } from '../../enums/organizationUserStatusType';
+import { OrganizationUserType } from '../../enums/organizationUserType';
+
+export class CollectionUserResponse {
+    organizationUserId: string;
+    accessAll: boolean;
+    name: string;
+    email: string;
+    type: OrganizationUserType;
+    status: OrganizationUserStatusType;
+    readOnly: boolean;
+
+    constructor(response: any) {
+        this.organizationUserId = response.OrganizationUserId;
+        this.accessAll = response.AccessAll;
+        this.name = response.Name;
+        this.email = response.Email;
+        this.type = response.Type;
+        this.status = response.Status;
+        this.readOnly = response.ReadOnly;
+    }
+}
diff --git a/src/models/response/groupResponse.ts b/src/models/response/groupResponse.ts
new file mode 100644
index 00000000000..960e077a2ad
--- /dev/null
+++ b/src/models/response/groupResponse.ts
@@ -0,0 +1,28 @@
+import { SelectionReadOnlyResponse } from './selectionReadOnlyResponse';
+
+export class GroupResponse {
+    id: string;
+    organizationId: string;
+    name: string;
+    accessAll: boolean;
+    externalId: string;
+
+    constructor(response: any) {
+        this.id = response.Id;
+        this.organizationId = response.OrganizationId;
+        this.name = response.Name;
+        this.accessAll = response.AccessAll;
+        this.externalId = response.ExternalId;
+    }
+}
+
+export class GroupDetailsResponse extends GroupResponse {
+    collections: SelectionReadOnlyResponse[] = [];
+
+    constructor(response: any) {
+        super(response);
+        if (response.Collections != null) {
+            this.collections = response.Collections.map((c: any) => new SelectionReadOnlyResponse(c));
+        }
+    }
+}
diff --git a/src/models/response/groupUserResponse.ts b/src/models/response/groupUserResponse.ts
new file mode 100644
index 00000000000..0d8d25c30df
--- /dev/null
+++ b/src/models/response/groupUserResponse.ts
@@ -0,0 +1,20 @@
+import { OrganizationUserStatusType } from '../../enums/organizationUserStatusType';
+import { OrganizationUserType } from '../../enums/organizationUserType';
+
+export class GroupUserResponse {
+    organizationUserId: string;
+    accessAll: boolean;
+    name: string;
+    email: string;
+    type: OrganizationUserType;
+    status: OrganizationUserStatusType;
+
+    constructor(response: any) {
+        this.organizationUserId = response.OrganizationUserId;
+        this.accessAll = response.AccessAll;
+        this.name = response.Name;
+        this.email = response.Email;
+        this.type = response.Type;
+        this.status = response.Status;
+    }
+}
diff --git a/src/models/response/selectionReadOnlyResponse.ts b/src/models/response/selectionReadOnlyResponse.ts
new file mode 100644
index 00000000000..c5f2c2dffde
--- /dev/null
+++ b/src/models/response/selectionReadOnlyResponse.ts
@@ -0,0 +1,9 @@
+export class SelectionReadOnlyResponse {
+    id: string;
+    readOnly: boolean;
+
+    constructor(response: any) {
+        this.id = response.Id;
+        this.readOnly = response.ReadOnly;
+    }
+}
diff --git a/src/models/response/syncResponse.ts b/src/models/response/syncResponse.ts
index 58c02807399..3d0b7410990 100644
--- a/src/models/response/syncResponse.ts
+++ b/src/models/response/syncResponse.ts
@@ -1,5 +1,5 @@
 import { CipherResponse } from './cipherResponse';
-import { CollectionResponse } from './collectionResponse';
+import { CollectionDetailsResponse } from './collectionResponse';
 import { DomainsResponse } from './domainsResponse';
 import { FolderResponse } from './folderResponse';
 import { ProfileResponse } from './profileResponse';
@@ -7,7 +7,7 @@ import { ProfileResponse } from './profileResponse';
 export class SyncResponse {
     profile?: ProfileResponse;
     folders: FolderResponse[] = [];
-    collections: CollectionResponse[] = [];
+    collections: CollectionDetailsResponse[] = [];
     ciphers: CipherResponse[] = [];
     domains?: DomainsResponse;
 
@@ -24,7 +24,7 @@ export class SyncResponse {
 
         if (response.Collections) {
             response.Collections.forEach((collection: any) => {
-                this.collections.push(new CollectionResponse(collection));
+                this.collections.push(new CollectionDetailsResponse(collection));
             });
         }
 
diff --git a/src/services/api.service.ts b/src/services/api.service.ts
index 7eb3331f450..e8a1cdedbd0 100644
--- a/src/services/api.service.ts
+++ b/src/services/api.service.ts
@@ -12,9 +12,11 @@ import { CipherBulkShareRequest } from '../models/request/cipherBulkShareRequest
 import { CipherCollectionsRequest } from '../models/request/cipherCollectionsRequest';
 import { CipherRequest } from '../models/request/cipherRequest';
 import { CipherShareRequest } from '../models/request/cipherShareRequest';
+import { CollectionRequest } from '../models/request/collectionRequest';
 import { EmailRequest } from '../models/request/emailRequest';
 import { EmailTokenRequest } from '../models/request/emailTokenRequest';
 import { FolderRequest } from '../models/request/folderRequest';
+import { GroupRequest } from '../models/request/groupRequest';
 import { ImportCiphersRequest } from '../models/request/importCiphersRequest';
 import { ImportDirectoryRequest } from '../models/request/importDirectoryRequest';
 import { ImportOrganizationCiphersRequest } from '../models/request/importOrganizationCiphersRequest';
@@ -40,10 +42,19 @@ import { UpdateTwoFactorYubioOtpRequest } from '../models/request/updateTwoFacto
 
 import { BillingResponse } from '../models/response/billingResponse';
 import { CipherResponse } from '../models/response/cipherResponse';
-import { CollectionResponse } from '../models/response/collectionResponse';
+import {
+    CollectionGroupDetailsResponse,
+    CollectionResponse,
+} from '../models/response/collectionResponse';
+import { CollectionUserResponse } from '../models/response/collectionUserResponse';
 import { DomainsResponse } from '../models/response/domainsResponse';
 import { ErrorResponse } from '../models/response/errorResponse';
 import { FolderResponse } from '../models/response/folderResponse';
+import {
+    GroupDetailsResponse,
+    GroupResponse,
+} from '../models/response/groupResponse';
+import { GroupUserResponse } from '../models/response/groupUserResponse';
 import { IdentityTokenResponse } from '../models/response/identityTokenResponse';
 import { IdentityTwoFactorResponse } from '../models/response/identityTwoFactorResponse';
 import { ListResponse } from '../models/response/listResponse';
@@ -350,11 +361,70 @@ export class ApiService implements ApiServiceAbstraction {
 
     // Collections APIs
 
+    async getCollectionDetails(organizationId: string, id: string): Promise<CollectionGroupDetailsResponse> {
+        const r = await this.send('GET', '/organizations/' + organizationId + '/collections/' + id + '/details',
+            null, true, true);
+        return new CollectionGroupDetailsResponse(r);
+    }
+
     async getCollections(organizationId: string): Promise<ListResponse<CollectionResponse>> {
         const r = await this.send('GET', '/organizations/' + organizationId + '/collections', null, true, true);
         return new ListResponse(r, CollectionResponse);
     }
 
+    async getCollectionUsers(organizationId: string, id: string): Promise<ListResponse<CollectionUserResponse>> {
+        const r = await this.send('GET', '/organizations/' + organizationId + '/collections/' + id + '/users',
+            null, true, true);
+        return new ListResponse(r, CollectionUserResponse);
+    }
+
+    async postCollection(request: CollectionRequest): Promise<CollectionResponse> {
+        const r = await this.send('POST', '/collections', request, true, true);
+        return new CollectionResponse(r);
+    }
+
+    async putCollection(id: string, request: CollectionRequest): Promise<CollectionResponse> {
+        const r = await this.send('PUT', '/collections/' + id, request, true, true);
+        return new CollectionResponse(r);
+    }
+
+    deleteCollection(id: string): Promise<any> {
+        return this.send('DELETE', '/collections/' + id, null, true, false);
+    }
+
+    // Groups APIs
+
+    async getGroupDetails(organizationId: string, id: string): Promise<GroupDetailsResponse> {
+        const r = await this.send('GET', '/organizations/' + organizationId + '/groups/' + id + '/details',
+            null, true, true);
+        return new GroupDetailsResponse(r);
+    }
+
+    async getGroups(organizationId: string): Promise<ListResponse<GroupResponse>> {
+        const r = await this.send('GET', '/organizations/' + organizationId + '/groups', null, true, true);
+        return new ListResponse(r, GroupResponse);
+    }
+
+    async getGroupUsers(organizationId: string, id: string): Promise<ListResponse<GroupUserResponse>> {
+        const r = await this.send('GET', '/organizations/' + organizationId + '/groups/' + id + '/users',
+            null, true, true);
+        return new ListResponse(r, GroupUserResponse);
+    }
+
+    async postGroup(request: GroupRequest): Promise<GroupResponse> {
+        const r = await this.send('POST', '/groups', request, true, true);
+        return new GroupResponse(r);
+    }
+
+    async putGroup(id: string, request: GroupRequest): Promise<GroupResponse> {
+        const r = await this.send('PUT', '/groups/' + id, request, true, true);
+        return new GroupResponse(r);
+    }
+
+    deleteGroup(id: string): Promise<any> {
+        return this.send('DELETE', '/groups/' + id, null, true, false);
+    }
+
     // Sync APIs
 
     async getSync(): Promise<SyncResponse> {
diff --git a/src/services/sync.service.ts b/src/services/sync.service.ts
index 2e025772c59..07dd66e0032 100644
--- a/src/services/sync.service.ts
+++ b/src/services/sync.service.ts
@@ -15,7 +15,7 @@ import { FolderData } from '../models/data/folderData';
 import { OrganizationData } from '../models/data/organizationData';
 
 import { CipherResponse } from '../models/response/cipherResponse';
-import { CollectionResponse } from '../models/response/collectionResponse';
+import { CollectionDetailsResponse } from '../models/response/collectionResponse';
 import { DomainsResponse } from '../models/response/domainsResponse';
 import { FolderResponse } from '../models/response/folderResponse';
 import { ProfileResponse } from '../models/response/profileResponse';
@@ -162,7 +162,7 @@ export class SyncService implements SyncServiceAbstraction {
         return await this.folderService.replace(folders);
     }
 
-    private async syncCollections(response: CollectionResponse[]) {
+    private async syncCollections(response: CollectionDetailsResponse[]) {
         const collections: { [id: string]: CollectionData; } = {};
         response.forEach((c) => {
             collections[c.id] = new CollectionData(c);