diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 9b298dc2..b9497962 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -7,6 +7,9 @@
 - reaction filter by kinds
 - reaction sort enum added
 - community follower roles enum added
+- invite status enum added
+- topic parents ids added
+- community CUDL resolvers added
 
 [0.4.4]
 - followers_stat removed for shout
diff --git a/orm/community.py b/orm/community.py
index 8f645eb1..3554715b 100644
--- a/orm/community.py
+++ b/orm/community.py
@@ -1,11 +1,12 @@
 import enum
 import time
 
-from sqlalchemy import ARRAY, Column, ForeignKey, Integer, String, func
+from sqlalchemy import ARRAY, Column, ForeignKey, Integer, String, distinct, func
 from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import relationship
 
 from orm.author import Author
+from orm.shout import Shout
 from services.db import Base
 
 
@@ -45,8 +46,7 @@ class Community(Base):
     desc = Column(String, nullable=False, default="")
     pic = Column(String, nullable=False, default="")
     created_at = Column(Integer, nullable=False, default=lambda: int(time.time()))
-
-    authors = relationship(Author, secondary="community_author")
+    created_by = Column(ForeignKey("author.id"), nullable=False)
 
     @hybrid_property
     def stat(self):
@@ -74,3 +74,15 @@ class CommunityStats:
             .filter(CommunityFollower.community == self.community.id)
             .scalar()
         )
+
+    @property
+    def authors(self):
+        # author has a shout with community id and featured_at is not null
+        return (
+            self.community.session.query(func.count(distinct(Author.id)))
+            .join(Shout)
+            .filter(
+                Shout.community_id == self.community.id, Shout.featured_at.is_not(None), Author.id.in_(Shout.authors)
+            )
+            .scalar()
+        )
diff --git a/resolvers/community.py b/resolvers/community.py
index 6d633ec1..faeaa2dc 100644
--- a/resolvers/community.py
+++ b/resolvers/community.py
@@ -1,7 +1,7 @@
 from orm.author import Author
 from orm.community import Community, CommunityFollower
 from services.db import local_session
-from services.schema import query
+from services.schema import mutation, query
 
 
 @query.field("get_communities_all")
@@ -29,3 +29,69 @@ async def get_communities_by_author(_, _info, slug="", user="", author_id=0):
             q = q.where(CommunityFollower.author == author_id)
         return q.all()
     return []
+
+
+@mutation.field("join_community")
+async def join_community(_, info, slug: str):
+    author_dict = info.context.get("author", {})
+    author_id = author_dict.get("id")
+    with local_session() as session:
+        community = session.query(Community).where(Community.slug == slug).first()
+        if not community:
+            return {"ok": False, "error": "Community not found"}
+        session.add(CommunityFollower(community=community.id, author=author_id))
+        session.commit()
+        return {"ok": True}
+
+
+@mutation.field("leave_community")
+async def leave_community(_, info, slug: str):
+    author_dict = info.context.get("author", {})
+    author_id = author_dict.get("id")
+    with local_session() as session:
+        session.query(CommunityFollower).where(
+            CommunityFollower.author == author_id, CommunityFollower.community == slug
+        ).delete()
+        session.commit()
+        return {"ok": True}
+
+
+@mutation.field("create_community")
+async def create_community(_, info, community_data):
+    author_dict = info.context.get("author", {})
+    author_id = author_dict.get("id")
+    with local_session() as session:
+        session.add(Community(author=author_id, **community_data))
+        session.commit()
+        return {"ok": True}
+
+
+@mutation.field("update_community")
+async def update_community(_, info, community_data):
+    author_dict = info.context.get("author", {})
+    author_id = author_dict.get("id")
+    slug = community_data.get("slug")
+    if slug:
+        with local_session() as session:
+            try:
+                session.query(Community).where(Community.created_by == author_id, Community.slug == slug).update(
+                    community_data
+                )
+                session.commit()
+            except Exception as e:
+                return {"ok": False, "error": str(e)}
+            return {"ok": True}
+    return {"ok": False, "error": "Please, set community slug in input"}
+
+
+@mutation.field("delete_community")
+async def delete_community(_, info, slug: str):
+    author_dict = info.context.get("author", {})
+    author_id = author_dict.get("id")
+    with local_session() as session:
+        try:
+            session.query(Community).where(Community.slug == slug, Community.created_by == author_id).delete()
+            session.commit()
+            return {"ok": True}
+        except Exception as e:
+            return {"ok": False, "error": str(e)}
diff --git a/schema/input.graphql b/schema/input.graphql
index a794969d..34ae1399 100644
--- a/schema/input.graphql
+++ b/schema/input.graphql
@@ -85,3 +85,10 @@ input NotificationSeenInput {
   notifications: [Int]
   thread: Int
 }
+
+input CommunityInput {
+  slug: String
+  name: String
+  desc: String
+  pic: String
+}
diff --git a/schema/mutation.graphql b/schema/mutation.graphql
index 4bb05c15..ed32f89b 100644
--- a/schema/mutation.graphql
+++ b/schema/mutation.graphql
@@ -36,4 +36,11 @@ type Mutation {
   notification_mark_seen(notification_id: Int!, seen: Boolean): CommonResult!
   notifications_seen_after(after: Int!, seen: Boolean): CommonResult!
   notifications_seen_thread(thread_id: String!, seen: Boolean): CommonResult!
+
+  # community
+  join_community(slug: String!): CommonResult!
+  leave_community(slug: String!): CommonResult!
+  create_community(input: CommunityInput!): CommonResult!
+  update_community(input: CommunityInput!): CommonResult!
+  delete_community(slug: String!): CommonResult!
 }
diff --git a/schema/type.graphql b/schema/type.graphql
index 5bb56531..a8c75723 100644
--- a/schema/type.graphql
+++ b/schema/type.graphql
@@ -99,6 +99,12 @@ type Stat {
   last_reacted_at: Int
 }
 
+type CommunityStat {
+  shouts: Int!
+  followers: Int!
+  authors: Int!
+}
+
 type Community {
   id: Int!
   slug: String!
@@ -107,6 +113,7 @@ type Community {
   pic: String!
   created_at: Int!
   created_by: Author!
+  stat: CommunityStat
 }
 
 type Collection {