diff --git a/app/database/__init__.py b/app/database/__init__.py
index 0283923..d8794c4 100644
--- a/app/database/__init__.py
+++ b/app/database/__init__.py
@@ -10,6 +10,13 @@ from .beatmapset import (
     BeatmapsetResp,
 )
 from .best_score import BestScore
+from .chat import (
+    ChannelType,
+    ChatChannel,
+    ChatChannelResp,
+    ChatMessage,
+    ChatMessageResp,
+)
 from .counts import (
     CountResp,
     MonthlyPlaycounts,
@@ -63,6 +70,11 @@ __all__ = [
     "Beatmapset",
     "BeatmapsetResp",
     "BestScore",
+    "ChannelType",
+    "ChatChannel",
+    "ChatChannelResp",
+    "ChatMessage",
+    "ChatMessageResp",
     "CountResp",
     "DailyChallengeStats",
     "DailyChallengeStatsResp",
diff --git a/app/database/chat.py b/app/database/chat.py
new file mode 100644
index 0000000..565657d
--- /dev/null
+++ b/app/database/chat.py
@@ -0,0 +1,193 @@
+from datetime import UTC, datetime
+from enum import Enum
+from typing import Self
+
+from app.database.lazer_user import RANKING_INCLUDES, User, UserResp
+from app.models.model import UTCBaseModel
+
+from pydantic import BaseModel
+from redis.asyncio import Redis
+from sqlmodel import (
+    VARCHAR,
+    BigInteger,
+    Column,
+    DateTime,
+    Field,
+    ForeignKey,
+    Relationship,
+    SQLModel,
+    select,
+)
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+# ChatChannel
+
+
+class ChatUserAttributes(BaseModel):
+    can_message: bool
+    can_message_error: str | None = None
+    last_read_id: int
+
+
+class ChannelType(str, Enum):
+    PUBLIC = "PUBLIC"
+    PRIVATE = "PRIVATE"
+    MULTIPLAYER = "MULTIPLAYER"
+    SPECTATOR = "SPECTATOR"
+    TEMPORARY = "TEMPORARY"
+    PM = "PM"
+    GROUP = "GROUP"
+    SYSTEM = "SYSTEM"
+    ANNOUNCE = "ANNOUNCE"
+    TEAM = "TEAM"
+
+
+class ChatChannelBase(SQLModel):
+    name: str = Field(sa_column=Column(VARCHAR(50), index=True))
+    description: str = Field(sa_column=Column(VARCHAR(255), index=True))
+    icon: str | None = Field(default=None)
+    type: ChannelType = Field(index=True)
+
+
+class ChatChannel(ChatChannelBase, table=True):
+    __tablename__ = "chat_channels"  # pyright: ignore[reportAssignmentType]
+    channel_id: int | None = Field(primary_key=True, index=True, default=None)
+
+    @classmethod
+    async def get(
+        cls, channel: str | int, session: AsyncSession
+    ) -> "ChatChannel | None":
+        if isinstance(channel, int) or channel.isdigit():
+            channel_ = await session.get(ChatChannel, channel)
+            if channel_ is not None:
+                return channel_
+        return (
+            await session.exec(select(ChatChannel).where(ChatChannel.name == channel))
+        ).first()
+
+
+class ChatChannelResp(ChatChannelBase):
+    channel_id: int
+    moderated: bool = False
+    uuid: str | None = None
+    current_user_attributes: ChatUserAttributes | None = None
+    last_read_id: int | None = None
+    last_message_id: int | None = None
+    recent_messages: list[str] | None = None
+    users: list[int] | None = None
+    message_length_limit: int = 1000
+
+    @classmethod
+    async def from_db(
+        cls,
+        channel: ChatChannel,
+        session: AsyncSession,
+        users: list[int],
+        user: User,
+        redis: Redis,
+    ) -> Self:
+        c = cls.model_validate(channel)
+        silence = (
+            await session.exec(
+                select(SilenceUser).where(
+                    SilenceUser.channel_id == channel.channel_id,
+                    SilenceUser.user_id == user.id,
+                )
+            )
+        ).first()
+
+        last_msg = await redis.get(f"chat:{channel.channel_id}:last_msg")
+        if last_msg and last_msg.isdigit():
+            last_msg = int(last_msg)
+        else:
+            last_msg = None
+
+        last_read_id = await redis.get(f"chat:{channel.channel_id}:last_read:{user.id}")
+        if last_read_id and last_read_id.isdigit():
+            last_read_id = int(last_read_id)
+        else:
+            last_read_id = last_msg
+
+        if silence is not None:
+            attribute = ChatUserAttributes(
+                can_message=False,
+                can_message_error=silence.reason or "You are muted in this channel.",
+                last_read_id=last_read_id or 0,
+            )
+            c.moderated = True
+        else:
+            attribute = ChatUserAttributes(
+                can_message=True,
+                last_read_id=last_read_id or 0,
+            )
+            c.moderated = False
+
+        c.current_user_attributes = attribute
+        c.users = users
+        c.last_message_id = last_msg
+        c.last_read_id = last_read_id
+        return c
+
+
+# ChatMessage
+
+
+class MessageType(str, Enum):
+    ACTION = "action"
+    MARKDOWN = "markdown"
+    PLAIN = "plain"
+
+
+class ChatMessageBase(UTCBaseModel, SQLModel):
+    channel_id: int = Field(index=True, foreign_key="chat_channels.channel_id")
+    content: str = Field(sa_column=Column(VARCHAR(1000)))
+    message_id: int | None = Field(index=True, primary_key=True, default=None)
+    sender_id: int = Field(
+        sa_column=Column(BigInteger, ForeignKey("lazer_users.id"), index=True)
+    )
+    timestamp: datetime = Field(
+        sa_column=Column(DateTime, index=True), default=datetime.now(UTC)
+    )
+    type: MessageType = Field(default=MessageType.PLAIN, index=True, exclude=True)
+    uuid: str | None = Field(default=None)
+
+
+class ChatMessage(ChatMessageBase, table=True):
+    __tablename__ = "chat_messages"  # pyright: ignore[reportAssignmentType]
+    user: User = Relationship(sa_relationship_kwargs={"lazy": "joined"})
+
+
+class ChatMessageResp(ChatMessageBase):
+    sender: UserResp | None = None
+    is_action: bool = False
+
+    @classmethod
+    async def from_db(
+        cls, db_message: ChatMessage, session: AsyncSession, user: User | None = None
+    ) -> "ChatMessageResp":
+        m = cls.model_validate(db_message.model_dump())
+        m.is_action = db_message.type == MessageType.ACTION
+        if user:
+            m.sender = await UserResp.from_db(user, session, RANKING_INCLUDES)
+        else:
+            m.sender = await UserResp.from_db(
+                db_message.user, session, RANKING_INCLUDES
+            )
+        return m
+
+
+# SilenceUser
+
+
+class SilenceUser(UTCBaseModel, SQLModel, table=True):
+    __tablename__ = "chat_silence_users"  # pyright: ignore[reportAssignmentType]
+    id: int | None = Field(primary_key=True, default=None, index=True)
+    user_id: int = Field(
+        sa_column=Column(BigInteger, ForeignKey("lazer_users.id"), index=True)
+    )
+    channel_id: int = Field(foreign_key="chat_channels.channel_id", index=True)
+    until: datetime | None = Field(sa_column=Column(DateTime, index=True), default=None)
+    reason: str | None = Field(default=None, sa_column=Column(VARCHAR(255), index=True))
+    banned_at: datetime = Field(
+        sa_column=Column(DateTime, index=True), default=datetime.now(UTC)
+    )
diff --git a/app/dependencies/database.py b/app/dependencies/database.py
index bb4c065..f7e94ce 100644
--- a/app/dependencies/database.py
+++ b/app/dependencies/database.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from collections.abc import AsyncIterator, Callable
 from contextvars import ContextVar
 import json
 
@@ -51,6 +52,17 @@ async def get_db():
         yield session
 
 
+DBFactory = Callable[[], AsyncIterator[AsyncSession]]
+
+
+async def get_db_factory() -> DBFactory:
+    async def _factory() -> AsyncIterator[AsyncSession]:
+        async with AsyncSession(engine) as session:
+            yield session
+
+    return _factory
+
+
 # Redis 依赖
 def get_redis():
     return redis_client
diff --git a/app/dependencies/param.py b/app/dependencies/param.py
new file mode 100644
index 0000000..174adde
--- /dev/null
+++ b/app/dependencies/param.py
@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+from typing import Any
+
+from fastapi import Request
+from fastapi.exceptions import RequestValidationError
+from pydantic import BaseModel, ValidationError
+
+
+def BodyOrForm[T: BaseModel](model: type[T]):
+    async def dependency(
+        request: Request,
+    ) -> T:
+        content_type = request.headers.get("content-type", "")
+
+        data: dict[str, Any] = {}
+        if "application/json" in content_type:
+            try:
+                data = await request.json()
+            except Exception:
+                raise RequestValidationError(
+                    [
+                        {
+                            "loc": ("body",),
+                            "msg": "Invalid JSON body",
+                            "type": "value_error",
+                        }
+                    ]
+                )
+        else:
+            form = await request.form()
+            data = dict(form)
+
+        try:
+            return model(**data)
+        except ValidationError as e:
+            raise RequestValidationError(e.errors())
+
+    return dependency
diff --git a/app/models/chat.py b/app/models/chat.py
new file mode 100644
index 0000000..116342f
--- /dev/null
+++ b/app/models/chat.py
@@ -0,0 +1,10 @@
+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel
+
+
+class ChatEvent(BaseModel):
+    event: str
+    data: dict[str, Any] | None = None
diff --git a/app/router/__init__.py b/app/router/__init__.py
index 57fc949..6be08fc 100644
--- a/app/router/__init__.py
+++ b/app/router/__init__.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 from app.signalr import signalr_router as signalr_router
 
 from .auth import router as auth_router
+from .chat import chat_router as chat_router
 from .fetcher import fetcher_router as fetcher_router
 from .file import file_router as file_router
 from .private import private_router as private_router
@@ -17,6 +18,7 @@ __all__ = [
     "api_v1_router",
     "api_v2_router",
     "auth_router",
+    "chat_router",
     "fetcher_router",
     "file_router",
     "private_router",
diff --git a/app/router/chat/__init__.py b/app/router/chat/__init__.py
new file mode 100644
index 0000000..3ed7897
--- /dev/null
+++ b/app/router/chat/__init__.py
@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from app.config import settings
+from app.router.v2 import api_v2_router as router
+
+from . import channel, message  # noqa: F401
+from .server import chat_router as chat_router
+
+from fastapi import Query
+
+__all__ = ["chat_router"]
+
+
+@router.get("/notifications")
+async def get_notifications(max_id: int | None = Query(None)):
+    if settings.server_url is not None:
+        notification_endpoint = f"{settings.server_url}notification-server".replace(
+            "http://", "ws://"
+        ).replace("https://", "wss://")
+    else:
+        notification_endpoint = "/notification-server"
+
+    return {
+        "has_more": False,
+        "notifications": [],
+        "unread_count": 0,
+        "notification_endpoint": notification_endpoint,
+    }
diff --git a/app/router/chat/channel.py b/app/router/chat/channel.py
new file mode 100644
index 0000000..798a5f2
--- /dev/null
+++ b/app/router/chat/channel.py
@@ -0,0 +1,138 @@
+from __future__ import annotations
+
+from typing import Any
+
+from app.database.chat import (
+    ChannelType,
+    ChatChannel,
+    ChatChannelResp,
+)
+from app.database.lazer_user import User, UserResp
+from app.dependencies.database import get_db, get_redis
+from app.dependencies.user import get_current_user
+from app.router.v2 import api_v2_router as router
+
+from .server import server
+
+from fastapi import Depends, HTTPException, Query, Security
+from pydantic import BaseModel, Field
+from redis.asyncio import Redis
+from sqlmodel import select
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+
+class UpdateResponse(BaseModel):
+    presence: list[ChatChannelResp] = Field(default_factory=list)
+    silences: list[Any] = Field(default_factory=list)
+
+
+@router.get("/chat/updates", response_model=UpdateResponse)
+async def get_update(
+    history_since: int | None = Query(None),
+    since: int | None = Query(None),
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+    includes: list[str] = Query(["presence"], alias="includes[]"),
+    redis: Redis = Depends(get_redis),
+):
+    resp = UpdateResponse()
+    if "presence" in includes:
+        channel_ids = server.get_user_joined_channel(current_user.id)
+        for channel_id in channel_ids:
+            channel = await ChatChannel.get(channel_id, session)
+            if channel:
+                resp.presence.append(
+                    await ChatChannelResp.from_db(
+                        channel,
+                        session,
+                        server.channels.get(channel_id, []),
+                        current_user,
+                        redis,
+                    )
+                )
+    return resp
+
+
+@router.put("/chat/channels/{channel}/users/{user}", response_model=ChatChannelResp)
+async def join_channel(
+    channel: str,
+    user: str,
+    current_user: User = Security(get_current_user, scopes=["chat.write_manage"]),
+    session: AsyncSession = Depends(get_db),
+):
+    db_channel = await ChatChannel.get(channel, session)
+
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    return await server.join_channel(current_user, db_channel, session)
+
+
+@router.delete(
+    "/chat/channels/{channel}/users/{user}",
+    status_code=204,
+)
+async def leave_channel(
+    channel: str,
+    user: str,
+    current_user: User = Security(get_current_user, scopes=["chat.write_manage"]),
+    session: AsyncSession = Depends(get_db),
+):
+    db_channel = await ChatChannel.get(channel, session)
+
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    await server.leave_channel(current_user, db_channel, session)
+    return
+
+
+@router.get("/chat/channels")
+async def get_channel_list(
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+    redis: Redis = Depends(get_redis),
+):
+    channels = (
+        await session.exec(
+            select(ChatChannel).where(ChatChannel.type == ChannelType.PUBLIC)
+        )
+    ).all()
+    results = []
+    for channel in channels:
+        assert channel.channel_id is not None
+        results.append(
+            await ChatChannelResp.from_db(
+                channel,
+                session,
+                server.channels.get(channel.channel_id, []),
+                current_user,
+                redis,
+            )
+        )
+    return results
+
+
+class GetChannelResp(BaseModel):
+    channel: ChatChannelResp
+    users: list[UserResp] = Field(default_factory=list)
+
+
+@router.get("/chat/channels/{channel}")
+async def get_channel(
+    channel: str,
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+    redis: Redis = Depends(get_redis),
+):
+    db_channel = await ChatChannel.get(channel, session)
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    assert db_channel.channel_id is not None
+    return GetChannelResp(
+        channel=await ChatChannelResp.from_db(
+            db_channel,
+            session,
+            server.channels.get(db_channel.channel_id, []),
+            current_user,
+            redis,
+        )
+    )
diff --git a/app/router/chat/message.py b/app/router/chat/message.py
new file mode 100644
index 0000000..5bab869
--- /dev/null
+++ b/app/router/chat/message.py
@@ -0,0 +1,98 @@
+from __future__ import annotations
+
+from app.database import ChatMessageResp
+from app.database.chat import ChatChannel, ChatMessage, MessageType
+from app.database.lazer_user import User
+from app.dependencies.database import get_db
+from app.dependencies.param import BodyOrForm
+from app.dependencies.user import get_current_user
+from app.router.v2 import api_v2_router as router
+
+from .server import server
+
+from fastapi import Depends, HTTPException, Query, Security
+from pydantic import BaseModel
+from sqlmodel import col, select
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+
+@router.post("/chat/ack")
+async def keep_alive(
+    history_since: int | None = Query(None),
+    since: int | None = Query(None),
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+):
+    return {"silences": []}
+
+
+class MessageReq(BaseModel):
+    message: str
+    is_action: bool = False
+    uuid: str | None = None
+
+
+@router.post("/chat/channels/{channel}/messages", response_model=ChatMessageResp)
+async def send_message(
+    channel: str,
+    req: MessageReq = Depends(BodyOrForm(MessageReq)),
+    current_user: User = Security(get_current_user, scopes=["chat.write"]),
+    session: AsyncSession = Depends(get_db),
+):
+    db_channel = await ChatChannel.get(channel, session)
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    msg = ChatMessage(
+        channel_id=db_channel.channel_id,
+        content=req.message,
+        sender_id=current_user.id,
+        type=MessageType.ACTION if req.is_action else MessageType.PLAIN,
+        uuid=req.uuid,
+    )
+    session.add(msg)
+    await session.commit()
+    await session.refresh(msg)
+    await session.refresh(current_user)
+    resp = await ChatMessageResp.from_db(msg, session, current_user)
+    await server.send_message_to_channel(resp)
+    return resp
+
+
+@router.get("/chat/channels/{channel}/messages", response_model=list[ChatMessageResp])
+async def get_message(
+    channel: str,
+    limit: int = Query(50, ge=1, le=50),
+    since: int = Query(default=0, ge=0),
+    until: int | None = Query(None),
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+):
+    db_channel = await ChatChannel.get(channel, session)
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    messages = await session.exec(
+        select(ChatMessage)
+        .where(
+            ChatMessage.channel_id == db_channel.channel_id,
+            col(ChatMessage.message_id) > since,
+            col(ChatMessage.message_id) < until if until is not None else True,
+        )
+        .order_by(col(ChatMessage.timestamp).desc())
+        .limit(limit)
+    )
+    resp = [await ChatMessageResp.from_db(msg, session) for msg in messages]
+    resp.reverse()
+    return resp
+
+
+@router.put("/chat/channels/{channel}/mark-as-read/{message}", status_code=204)
+async def mark_as_read(
+    channel: str,
+    message: int,
+    current_user: User = Security(get_current_user, scopes=["chat.read"]),
+    session: AsyncSession = Depends(get_db),
+):
+    db_channel = await ChatChannel.get(channel, session)
+    if db_channel is None:
+        raise HTTPException(status_code=404, detail="Channel not found")
+    await server.mark_as_read(db_channel.channel_id, message)
diff --git a/app/router/chat/server.py b/app/router/chat/server.py
new file mode 100644
index 0000000..727f426
--- /dev/null
+++ b/app/router/chat/server.py
@@ -0,0 +1,190 @@
+from __future__ import annotations
+
+import asyncio
+
+from app.database.chat import ChatChannel, ChatChannelResp, ChatMessageResp
+from app.database.lazer_user import User
+from app.dependencies.database import DBFactory, get_db_factory, get_redis
+from app.dependencies.user import get_current_user
+from app.log import logger
+from app.models.chat import ChatEvent
+
+from fastapi import APIRouter, Depends, Header, WebSocket, WebSocketDisconnect
+from fastapi.security import SecurityScopes
+from fastapi.websockets import WebSocketState
+from redis.asyncio import Redis
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+
+class ChatServer:
+    def __init__(self):
+        self.connect_client: dict[int, WebSocket] = {}
+        self.channels: dict[int, list[int]] = {}
+        self.redis: Redis = get_redis()
+
+        self.tasks: set[asyncio.Task] = set()
+
+    def _add_task(self, task):
+        task = asyncio.create_task(task)
+        self.tasks.add(task)
+        task.add_done_callback(self.tasks.discard)
+
+    def connect(self, user_id: int, client: WebSocket):
+        self.connect_client[user_id] = client
+
+    def get_user_joined_channel(self, user_id: int) -> list[int]:
+        return [
+            channel_id
+            for channel_id, users in self.channels.items()
+            if user_id in users
+        ]
+
+    async def disconnect(self, user: User, session: AsyncSession):
+        user_id = user.id
+        if user_id in self.connect_client:
+            del self.connect_client[user_id]
+        for channel_id, channel in self.channels.items():
+            if user_id in channel:
+                channel.remove(user_id)
+                channel = await ChatChannel.get(channel_id, session)
+                if channel:
+                    await self.leave_channel(user, channel, session)
+
+    async def send_event(self, client: WebSocket, event: ChatEvent):
+        if client.client_state == WebSocketState.CONNECTED:
+            await client.send_text(event.model_dump_json())
+
+    async def broadcast(self, channel_id: int, event: ChatEvent):
+        for user_id in self.channels.get(channel_id, []):
+            client = self.connect_client.get(user_id)
+            if client:
+                await self.send_event(client, event)
+
+    async def mark_as_read(self, channel_id: int, message_id: int):
+        await self.redis.set(f"chat:{channel_id}:last_msg", message_id)
+
+    async def send_message_to_channel(self, message: ChatMessageResp):
+        self._add_task(
+            self.broadcast(
+                message.channel_id,
+                ChatEvent(
+                    event="chat.message.new",
+                    data={"messages": [message], "users": [message.sender]},
+                ),
+            )
+        )
+        await self.mark_as_read(message.channel_id, message.message_id)
+
+    async def join_channel(
+        self, user: User, channel: ChatChannel, session: AsyncSession
+    ) -> ChatChannelResp:
+        user_id = user.id
+        channel_id = channel.channel_id
+        assert channel_id is not None
+
+        if channel_id not in self.channels:
+            self.channels[channel_id] = []
+        if user_id not in self.channels[channel_id]:
+            self.channels[channel_id].append(user_id)
+
+        channel_resp = await ChatChannelResp.from_db(
+            channel, session, self.channels[channel_id], user, self.redis
+        )
+
+        client = self.connect_client.get(user_id)
+        if client:
+            await self.send_event(
+                client,
+                ChatEvent(
+                    event="chat.channel.join",
+                    data=channel_resp.model_dump(),
+                ),
+            )
+
+        return channel_resp
+
+    async def leave_channel(
+        self, user: User, channel: ChatChannel, session: AsyncSession
+    ) -> None:
+        user_id = user.id
+        channel_id = channel.channel_id
+        assert channel_id is not None
+
+        if channel_id in self.channels and user_id in self.channels[channel_id]:
+            self.channels[channel_id].remove(user_id)
+
+        if not self.channels.get(channel_id):
+            del self.channels[channel_id]
+
+        channel_resp = await ChatChannelResp.from_db(
+            channel, session, self.channels.get(channel_id, []), user, self.redis
+        )
+        client = self.connect_client.get(user_id)
+        if client:
+            await self.send_event(
+                client,
+                ChatEvent(
+                    event="chat.channel.part",
+                    data=channel_resp.model_dump(),
+                ),
+            )
+
+
+server = ChatServer()
+
+chat_router = APIRouter(include_in_schema=False)
+
+
+async def _listen_stop(ws: WebSocket, user_id: int, factory: DBFactory):
+    try:
+        while True:
+            packets = await ws.receive_json()
+            if packets.get("event") == "chat.end":
+                async for session in factory():
+                    user = await session.get(User, user_id)
+                    if user is None:
+                        break
+                    await server.disconnect(user, session)
+                await ws.close(code=1000)
+                break
+    except WebSocketDisconnect as e:
+        logger.info(
+            f"[NotificationServer] Client {user_id} disconnected: {e.code}, {e.reason}"
+        )
+    except RuntimeError as e:
+        if "disconnect message" in str(e):
+            logger.info(f"[NotificationServer] Client {user_id} closed the connection.")
+        else:
+            logger.exception(f"RuntimeError in client {user_id}: {e}")
+    except Exception:
+        logger.exception(f"Error in client {user_id}")
+
+
+@chat_router.websocket("/notification-server")
+async def chat_websocket(
+    websocket: WebSocket,
+    authorization: str = Header(...),
+    factory: DBFactory = Depends(get_db_factory),
+):
+    async for session in factory():
+        token = authorization[7:]
+        if (
+            user := await get_current_user(
+                SecurityScopes(scopes=["chat.read"]), session, token_pw=token
+            )
+        ) is None:
+            await websocket.close(code=1008)
+            return
+
+        await websocket.accept()
+        login = await websocket.receive_json()
+        if login.get("event") != "chat.start":
+            await websocket.close(code=1008)
+            return
+        user_id = user.id
+        assert user_id
+        server.connect(user_id, websocket)
+        channel = await ChatChannel.get(1, session)
+        if channel is not None:
+            await server.join_channel(user, channel, session)
+    await _listen_stop(websocket, user_id, factory)
diff --git a/app/service/subscribers/base.py b/app/service/subscribers/base.py
index 144dfd0..8fc5654 100644
--- a/app/service/subscribers/base.py
+++ b/app/service/subscribers/base.py
@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import asyncio
 from collections.abc import Awaitable, Callable
+from fnmatch import fnmatch
 from typing import Any
 
 from app.dependencies.database import get_redis_pubsub
@@ -29,12 +30,17 @@ class RedisSubscriber:
                 ignore_subscribe_messages=True, timeout=None
             )
             if message is not None and message["type"] == "message":
-                method = self.handlers.get(message["channel"])
-                if method:
+                matched_handlers = []
+                if message["channel"] in self.handlers:
+                    matched_handlers.extend(self.handlers[message["channel"]])
+                for pattern, handlers in self.handlers.items():
+                    if fnmatch(message["channel"], pattern):
+                        matched_handlers.extend(handlers)
+                if matched_handlers:
                     await asyncio.gather(
                         *[
                             handler(message["channel"], message["data"])
-                            for handler in method
+                            for handler in matched_handlers
                         ]
                     )
 
diff --git a/main.py b/main.py
index c2739c4..66471cc 100644
--- a/main.py
+++ b/main.py
@@ -13,6 +13,7 @@ from app.router import (
     api_v1_router,
     api_v2_router,
     auth_router,
+    chat_router,
     fetcher_router,
     file_router,
     private_router,
@@ -71,6 +72,7 @@ app = FastAPI(
 
 app.include_router(api_v2_router)
 app.include_router(api_v1_router)
+app.include_router(chat_router)
 app.include_router(redirect_api_router)
 app.include_router(signalr_router)
 app.include_router(fetcher_router)
diff --git a/migrations/versions/dd33d89aa2c2_chat_add_chat.py b/migrations/versions/dd33d89aa2c2_chat_add_chat.py
new file mode 100644
index 0000000..f548f55
--- /dev/null
+++ b/migrations/versions/dd33d89aa2c2_chat_add_chat.py
@@ -0,0 +1,192 @@
+"""chat: add chat
+
+Revision ID: dd33d89aa2c2
+Revises: 9f6b27e8ea51
+Create Date: 2025-08-15 14:22:34.775877
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+
+# revision identifiers, used by Alembic.
+revision: str = "dd33d89aa2c2"
+down_revision: str | Sequence[str] | None = "9f6b27e8ea51"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    channel_table = op.create_table(
+        "chat_channels",
+        sa.Column("name", sa.VARCHAR(length=50), nullable=True),
+        sa.Column("description", sa.VARCHAR(length=255), nullable=True),
+        sa.Column("icon", sqlmodel.sql.sqltypes.AutoString(), nullable=True),
+        sa.Column(
+            "type",
+            sa.Enum(
+                "PUBLIC",
+                "PRIVATE",
+                "MULTIPLAYER",
+                "SPECTATOR",
+                "TEMPORARY",
+                "PM",
+                "GROUP",
+                "SYSTEM",
+                "ANNOUNCE",
+                "TEAM",
+                name="channeltype",
+            ),
+            nullable=False,
+        ),
+        sa.Column("channel_id", sa.Integer(), nullable=False),
+        sa.PrimaryKeyConstraint("channel_id"),
+    )
+    op.create_index(
+        op.f("ix_chat_channels_channel_id"),
+        "chat_channels",
+        ["channel_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_channels_description"),
+        "chat_channels",
+        ["description"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_channels_name"), "chat_channels", ["name"], unique=False
+    )
+    op.create_index(
+        op.f("ix_chat_channels_type"), "chat_channels", ["type"], unique=False
+    )
+    op.create_table(
+        "chat_messages",
+        sa.Column("channel_id", sa.Integer(), nullable=False),
+        sa.Column("content", sa.VARCHAR(length=1000), nullable=True),
+        sa.Column("message_id", sa.Integer(), nullable=False),
+        sa.Column("sender_id", sa.BigInteger(), nullable=True),
+        sa.Column("timestamp", sa.DateTime(), nullable=True),
+        sa.Column(
+            "type",
+            sa.Enum("ACTION", "MARKDOWN", "PLAIN", name="messagetype"),
+            nullable=False,
+        ),
+        sa.Column("uuid", sqlmodel.sql.sqltypes.AutoString(), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["channel_id"],
+            ["chat_channels.channel_id"],
+        ),
+        sa.ForeignKeyConstraint(
+            ["sender_id"],
+            ["lazer_users.id"],
+        ),
+        sa.PrimaryKeyConstraint("message_id"),
+    )
+    op.create_index(
+        op.f("ix_chat_messages_channel_id"),
+        "chat_messages",
+        ["channel_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_messages_message_id"),
+        "chat_messages",
+        ["message_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_messages_sender_id"), "chat_messages", ["sender_id"], unique=False
+    )
+    op.create_index(
+        op.f("ix_chat_messages_timestamp"), "chat_messages", ["timestamp"], unique=False
+    )
+    op.create_index(
+        op.f("ix_chat_messages_type"), "chat_messages", ["type"], unique=False
+    )
+    op.create_table(
+        "chat_silence_users",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("user_id", sa.BigInteger(), nullable=False),
+        sa.Column("channel_id", sa.Integer(), nullable=False),
+        sa.Column("until", sa.DateTime(), nullable=True),
+        sa.Column("banned_at", sa.DateTime(), nullable=False),
+        sa.Column("reason", sa.VARCHAR(length=255), nullable=True),
+        sa.ForeignKeyConstraint(
+            ["channel_id"],
+            ["chat_channels.channel_id"],
+        ),
+        sa.ForeignKeyConstraint(
+            ["user_id"],
+            ["lazer_users.id"],
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_channel_id"),
+        "chat_silence_users",
+        ["channel_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_reason"),
+        "chat_silence_users",
+        ["reason"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_until"),
+        "chat_silence_users",
+        ["until"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_banned_at"),
+        "chat_silence_users",
+        ["banned_at"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_user_id"),
+        "chat_silence_users",
+        ["user_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_chat_silence_users_id"),
+        "chat_silence_users",
+        ["id"],
+        unique=False,
+    )
+    op.bulk_insert(
+        channel_table,
+        [
+            {
+                "name": "osu!",
+                "description": "General discussion for osu!",
+                "type": "PUBLIC",
+            },
+            {
+                "name": "announce",
+                "description": "Official announcements",
+                "type": "PUBLIC",
+            },
+        ],
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table("chat_silence_users")
+    op.drop_table("chat_messages")
+    op.drop_table("chat_channels")
+    # ### end Alembic commands ###