Merge pull request #741 from cbcoutinho/feat/talk-spreed-integration

feat(talk): add MCP integration for Nextcloud Talk (spreed)

README.md

@@ -107,6 +107,7 @@ docker compose --profile login-flow up -d         # Port 8004
 | **Sharing** | 10+ | Create and manage shares |
 | **News** | 8 | Feeds, folders, items, feed health monitoring |
 | **Collectives** | 16 | Full CRUD on collectives, pages, and tags |
+| **Talk (spreed)** | 6 | List conversations, read/post messages, mark as read, list participants |
 | **Semantic Search** | 2+ | Vector search for Notes, Files, News items, and Deck cards (experimental, opt-in, requires infrastructure) |
 
 Want to see another Nextcloud app supported? [Open an issue](https://github.com/cbcoutinho/nextcloud-mcp-server/issues) or contribute a pull request!

app-hooks/post-installation/10-install-spreed-app.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -euox pipefail
+
+# Talk (spreed) ships its appstore release on demand; on a fresh container the
+# app is not yet installed, so app:install pulls it. On rebuilds where the
+# volume already has it, app:install fails with "already installed" — that
+# specific failure is benign, hence the trailing `|| true`. We then run
+# app:enable separately, which is the action that actually has to succeed.
+#
+# This split (install || true; then enable) is preferred over the previous
+# `app:install || app:enable` chain because:
+#  - `--keep-disabled` keeps install side-effects strictly to fetching/extracting
+#    the app, so the enable step is the single source of truth for whether the
+#    app is active.
+#  - `--force` skips the compatibility check, locking the script to spreed's
+#    current behaviour rather than the appstore's view of NC compatibility.
+#  - If app:install dies for an unrelated reason (network outage, appstore
+#    unreachable on a fresh install), app:enable now fails with the clearer
+#    "app not found" rather than the install-time error being masked entirely.
+php /var/www/html/occ app:install spreed --keep-disabled --force || true
+php /var/www/html/occ app:enable spreed

nextcloud_mcp_server/auth/scope_authorization.py

@@ -209,6 +209,7 @@ def require_scopes(*required_scopes: str):
                             "files.",
                             "tables.",
                             "deck.",
+                            "talk.",
                         ]
                     )
                 ]
@@ -229,6 +230,7 @@ def require_scopes(*required_scopes: str):
                             "files.",
                             "tables.",
                             "deck.",
+                            "talk.",
                         ]
                     )
 

nextcloud_mcp_server/client/__init__.py

@@ -23,6 +23,7 @@ from .news import NewsClient
 from .notes import NotesClient
 from .sharing import SharingClient
 from .tables import TablesClient
+from .talk import TalkClient
 from .users import UsersClient
 from .webdav import WebDAVClient
 from .webhooks import WebhooksClient
@@ -96,6 +97,7 @@ class NextcloudClient:
         self.collectives = CollectivesClient(self._client, username)
         self.deck = DeckClient(self._client, username)
         self.news = NewsClient(self._client, username)
+        self.talk = TalkClient(self._client, username)
         self.users = UsersClient(self._client, username)
         self.groups = GroupsClient(self._client, username)
         self.sharing = SharingClient(self._client, username)

nextcloud_mcp_server/client/talk.py

@@ -0,0 +1,283 @@
+"""HTTP client for the Nextcloud Talk (spreed) app.
+
+Talk exposes its REST API under ``/ocs/v2.php/apps/spreed/api/{v}/...``.
+The current versions used here are:
+
+- conversations & participants: ``api/v4`` (Nextcloud 22+)
+- chat:                          ``api/v1`` (Nextcloud 13+)
+
+All endpoints follow the OCS envelope ``{"ocs": {"meta": ..., "data": ...}}``,
+require ``OCS-APIRequest: true`` and respond as JSON when ``Accept:
+application/json`` is sent.
+"""
+
+import logging
+import re
+from typing import Any
+
+from nextcloud_mcp_server.client.base import BaseNextcloudClient
+from nextcloud_mcp_server.models.talk import (
+    TalkConversation,
+    TalkMessage,
+    TalkParticipant,
+)
+
+logger = logging.getLogger(__name__)
+
+
+# Spreed conversation tokens are short alphanumeric strings (e.g. "a1b2c3d4").
+# httpx does not normalise path traversal sequences, so a pathological token
+# like ``"../foo"`` would be sent verbatim. Validate up-front for clearer
+# errors and defence-in-depth.
+_TALK_TOKEN_RE = re.compile(r"^[A-Za-z0-9]+$")
+
+
+def _validate_token(token: str) -> None:
+    if not _TALK_TOKEN_RE.fullmatch(token):
+        raise ValueError(f"Invalid Talk conversation token: {token!r}")
+
+
+class TalkClient(BaseNextcloudClient):
+    """Client for Nextcloud Talk (spreed) app operations."""
+
+    app_name = "talk"
+
+    _ROOM_BASE = "/ocs/v2.php/apps/spreed/api/v4/room"
+    _CHAT_BASE = "/ocs/v2.php/apps/spreed/api/v1/chat"
+
+    def _talk_headers(self) -> dict[str, str]:
+        """Standard OCS+JSON headers for spreed API calls.
+
+        ``Content-Type`` is intentionally omitted — httpx adds it
+        automatically (and correctly) on requests that pass ``json=``,
+        so setting it here would also leak it onto bodyless GETs and
+        DELETEs.
+        """
+        return {
+            "OCS-APIRequest": "true",
+            "Accept": "application/json",
+        }
+
+    # Conversations (rooms)
+
+    async def list_conversations(
+        self,
+        *,
+        modified_since: int | None = None,
+        include_status: bool = False,
+        no_status_update: bool = True,
+    ) -> list[TalkConversation]:
+        """Return the user's Talk conversations.
+
+        Args:
+            modified_since: If provided, only return conversations modified
+                after this Unix timestamp (server-side filter).
+            include_status: Include user-status info for one-to-one rooms.
+            no_status_update: When True (default), the call does not bump
+                the user's "online" status — appropriate for an MCP server
+                acting in the background.
+        """
+        params: dict[str, Any] = {}
+        if modified_since is not None:
+            params["modifiedSince"] = modified_since
+        if include_status:
+            params["includeStatus"] = 1
+        if no_status_update:
+            params["noStatusUpdate"] = 1
+        response = await self._make_request(
+            "GET", self._ROOM_BASE, params=params, headers=self._talk_headers()
+        )
+        data = response.json()["ocs"]["data"]
+        return [TalkConversation(**room) for room in data]
+
+    async def get_conversation(self, token: str) -> TalkConversation:
+        """Fetch a single Talk conversation by its room token."""
+        _validate_token(token)
+        response = await self._make_request(
+            "GET", f"{self._ROOM_BASE}/{token}", headers=self._talk_headers()
+        )
+        return TalkConversation(**response.json()["ocs"]["data"])
+
+    async def create_conversation(
+        self,
+        *,
+        room_type: int = 2,
+        room_name: str,
+        invite: str | None = None,
+    ) -> TalkConversation:
+        """Create a new conversation (used for tests/fixtures).
+
+        Args:
+            room_type: 1=one-to-one, 2=group, 3=public. Defaults to 2.
+            room_name: Display name (required for group/public rooms).
+            invite: Optional user/group ID to invite at creation time.
+
+        This client method is not exposed as an MCP tool in the initial
+        Talk integration; it exists so integration tests can spin up
+        scratch rooms.
+        """
+        body: dict[str, Any] = {"roomType": room_type, "roomName": room_name}
+        if invite is not None:
+            body["invite"] = invite
+        response = await self._make_request(
+            "POST", self._ROOM_BASE, json=body, headers=self._talk_headers()
+        )
+        return TalkConversation(**response.json()["ocs"]["data"])
+
+    async def delete_conversation(self, token: str) -> None:
+        """Delete a conversation. Used by integration test cleanup."""
+        _validate_token(token)
+        await self._make_request(
+            "DELETE", f"{self._ROOM_BASE}/{token}", headers=self._talk_headers()
+        )
+
+    # Chat
+
+    async def get_messages(
+        self,
+        token: str,
+        *,
+        limit: int = 50,
+        last_known_message_id: int | None = None,
+        look_into_future: bool = False,
+        set_read_marker: bool = False,
+        include_last_known: bool = False,
+    ) -> tuple[list[TalkMessage], int | None]:
+        """Fetch chat messages for a conversation.
+
+        Args:
+            token: Conversation token.
+            limit: Max messages to return. spreed caps this server-side
+                at 200; values outside ``[1, 200]`` are clamped here so
+                callers don't get a confusing mismatch between the
+                requested limit and the returned ``count``.
+            last_known_message_id: Pagination cursor — pass the value
+                from the previous response's ``X-Chat-Last-Given`` header.
+            look_into_future: When False (default), return *older*
+                messages relative to ``last_known_message_id`` — i.e.,
+                read history. When True, this becomes a long-poll for
+                new messages, which we don't expose via MCP.
+            set_read_marker: When False (default), the call does not move
+                the user's read marker — consumers can call
+                ``mark_as_read`` explicitly.
+            include_last_known: Include the message identified by
+                ``last_known_message_id`` itself in the page.
+
+        Returns:
+            ``(messages, x_chat_last_given)`` where the integer is the
+            value of the ``X-Chat-Last-Given`` response header (or None
+            if the header was absent or unparseable), suitable for
+            pagination.
+        """
+        _validate_token(token)
+        clamped_limit = min(max(1, limit), 200)
+        params: dict[str, Any] = {
+            "limit": clamped_limit,
+            "lookIntoFuture": 1 if look_into_future else 0,
+            "setReadMarker": 1 if set_read_marker else 0,
+            "includeLastKnown": 1 if include_last_known else 0,
+        }
+        if last_known_message_id is not None:
+            params["lastKnownMessageId"] = last_known_message_id
+        response = await self._make_request(
+            "GET",
+            f"{self._CHAT_BASE}/{token}",
+            params=params,
+            headers=self._talk_headers(),
+        )
+        # 200 OK → JSON body with messages; 304 Not Modified → no body.
+        # _make_request's raise_for_status() lets 3xx through for GET, but
+        # spreed returns 200 with an empty data list when there's nothing
+        # new, so we trust the JSON body here.
+        last_given_header = response.headers.get("X-Chat-Last-Given")
+        last_given: int | None = None
+        if last_given_header:
+            try:
+                last_given = int(last_given_header)
+            except ValueError:
+                # Defensive: spreed always sends an int, but a misbehaving
+                # proxy could mangle the header. Don't crash the read flow.
+                logger.warning(
+                    "Invalid X-Chat-Last-Given header from spreed: %r",
+                    last_given_header,
+                )
+        data = response.json()["ocs"]["data"]
+        return [TalkMessage(**msg) for msg in data], last_given
+
+    async def send_message(
+        self,
+        token: str,
+        message: str,
+        *,
+        reply_to: int | None = None,
+        reference_id: str | None = None,
+        silent: bool = False,
+    ) -> TalkMessage:
+        """Post a chat message to a conversation.
+
+        Args:
+            token: Conversation token.
+            message: Message text (max 32000 chars per spreed docs/chat.md).
+            reply_to: Optional parent message ID to thread this reply.
+            reference_id: Optional client-provided UUID for idempotency on
+                retry (spreed dedupes on this within the conversation).
+            silent: When True, the message is delivered without push
+                notifications.
+        """
+        _validate_token(token)
+        body: dict[str, Any] = {"message": message}
+        if reply_to is not None:
+            body["replyTo"] = reply_to
+        if reference_id is not None:
+            body["referenceId"] = reference_id
+        if silent:
+            body["silent"] = True
+        response = await self._make_request(
+            "POST",
+            f"{self._CHAT_BASE}/{token}",
+            json=body,
+            headers=self._talk_headers(),
+        )
+        return TalkMessage(**response.json()["ocs"]["data"])
+
+    async def mark_as_read(
+        self, token: str, *, last_read_message: int | None = None
+    ) -> None:
+        """Mark the conversation as read.
+
+        If ``last_read_message`` is provided it sets the read marker to
+        that message; otherwise spreed marks everything currently in the
+        room as read.
+        """
+        _validate_token(token)
+        body: dict[str, Any] = {}
+        if last_read_message is not None:
+            body["lastReadMessage"] = last_read_message
+        # ``json=None`` makes httpx skip both the body and the
+        # ``Content-Type: application/json`` header — semantically correct
+        # for the bodyless "mark everything as read" call.
+        await self._make_request(
+            "POST",
+            f"{self._CHAT_BASE}/{token}/read",
+            json=body or None,
+            headers=self._talk_headers(),
+        )
+
+    # Participants
+
+    async def list_participants(
+        self, token: str, *, include_status: bool = False
+    ) -> list[TalkParticipant]:
+        """List participants of a Talk conversation."""
+        _validate_token(token)
+        params: dict[str, Any] = {}
+        if include_status:
+            params["includeStatus"] = 1
+        response = await self._make_request(
+            "GET",
+            f"{self._ROOM_BASE}/{token}/participants",
+            params=params,
+            headers=self._talk_headers(),
+        )
+        data = response.json()["ocs"]["data"]
+        return [TalkParticipant(**p) for p in data]

nextcloud_mcp_server/models/talk.py

@@ -0,0 +1,171 @@
+"""Pydantic models for the Nextcloud Talk (spreed) integration."""
+
+from typing import Any
+
+from pydantic import BaseModel, ConfigDict, Field, field_validator
+
+from .base import BaseResponse, StatusResponse
+
+# Domain models
+
+
+class TalkMessage(BaseModel):
+    """A single chat message in a Talk conversation.
+
+    See spreed docs/chat.md for the field definitions. We map only the
+    fields that are useful to MCP consumers; spreed returns more.
+    """
+
+    id: int
+    token: str
+    actorType: str
+    actorId: str
+    actorDisplayName: str
+    timestamp: int
+    systemMessage: str = ""
+    messageType: str
+    message: str
+    messageParameters: dict[str, Any] = Field(default_factory=dict)
+    expirationTimestamp: int | None = None
+    referenceId: str | None = None
+    markdown: bool | None = None
+
+    @field_validator("messageParameters", mode="before")
+    @classmethod
+    def _coerce_empty_list_params(cls, v: Any) -> Any:
+        # spreed serializes an empty parameter map as `[]` (PHP array) rather
+        # than `{}`; normalize so pydantic accepts it as a dict.
+        if isinstance(v, list) and not v:
+            return {}
+        return v
+
+
+class TalkConversation(BaseModel):
+    """A Talk conversation (room).
+
+    See spreed docs/conversation.md for the full field reference. Many
+    optional fields are omitted; we keep the ones useful for chat-centric
+    flows.
+    """
+
+    # ``populate_by_name=True`` lets us deserialize spreed's ``type`` key
+    # into the ``room_type`` field while still allowing internal callers
+    # to construct the model with ``room_type=...`` directly.
+    model_config = ConfigDict(populate_by_name=True)
+
+    id: int
+    token: str
+    # The spreed JSON wire format uses ``type`` for the room kind, but
+    # ``type`` shadows Python's builtin within the class scope, which
+    # would silently call this int field if anyone wrote ``type(...)``
+    # in a validator or method on this model. Map to ``room_type`` and
+    # alias the wire field instead.
+    room_type: int = Field(
+        alias="type",
+        description=(
+            "Conversation kind: 1=one-to-one, 2=group, 3=public, "
+            "4=changelog, 5=former one-to-one, 6=note-to-self."
+        ),
+    )
+    name: str
+    displayName: str
+    description: str = ""
+    participantType: int | None = None
+    unreadMessages: int = 0
+    unreadMention: bool = False
+    lastActivity: int | None = None
+    # spreed returns `0` (not `null`) when the user has not read any
+    # message in the room yet — compare to ``None`` explicitly rather
+    # than relying on truthiness, since `0` is falsy but valid.
+    lastReadMessage: int | None = None
+    lastMessage: TalkMessage | None = None
+    readOnly: int | None = None
+    isFavorite: bool | None = None
+    notificationLevel: int | None = None
+    objectType: str | None = None
+    objectId: str | None = None
+
+    @field_validator("lastMessage", mode="before")
+    @classmethod
+    def _coerce_empty_last_message(cls, v: Any) -> Any:
+        # spreed returns `lastMessage: []` (PHP empty array) when there has
+        # never been a message in the room; normalize to None.
+        if isinstance(v, list) and not v:
+            return None
+        return v
+
+
+class TalkParticipant(BaseModel):
+    """A participant (attendee) in a Talk conversation."""
+
+    attendeeId: int
+    actorType: str
+    actorId: str
+    displayName: str
+    participantType: int
+    inCall: int = 0
+    lastPing: int = 0
+    sessionIds: list[str] = Field(default_factory=list)
+    status: str | None = None
+    statusIcon: str | None = None
+    statusMessage: str | None = None
+
+
+# Response wrappers for MCP tools
+
+
+class ListConversationsResponse(BaseResponse):
+    """Response model for listing Talk conversations."""
+
+    results: list[TalkConversation] = Field(
+        description="Talk conversations the user participates in"
+    )
+    total: int = Field(description="Number of conversations returned")
+
+
+class GetConversationResponse(BaseResponse):
+    """Response model for fetching a single Talk conversation."""
+
+    conversation: TalkConversation = Field(description="The Talk conversation")
+
+
+class ListMessagesResponse(BaseResponse):
+    """Response model for fetching chat history of a conversation."""
+
+    conversation_token: str = Field(description="Token of the conversation")
+    results: list[TalkMessage] = Field(description="Chat messages in this page")
+    count: int = Field(description="Number of messages returned in this page")
+    last_known_message_id: int | None = Field(
+        default=None,
+        description=(
+            "ID to pass back as `last_known_message_id` to fetch the next "
+            "page (older history). Sourced from the `X-Chat-Last-Given` "
+            "response header."
+        ),
+    )
+
+
+class ListParticipantsResponse(BaseResponse):
+    """Response model for listing participants in a Talk conversation."""
+
+    conversation_token: str = Field(description="Token of the conversation")
+    results: list[TalkParticipant] = Field(
+        description="Participants of the conversation"
+    )
+    count: int = Field(description="Number of participants returned")
+
+
+class SendMessageResponse(BaseResponse):
+    """Response model returned after posting a chat message."""
+
+    message: TalkMessage = Field(description="The posted chat message")
+
+
+class MarkAsReadResponse(StatusResponse):
+    """Response model for the mark-as-read operation."""
+
+    conversation_token: str = Field(description="Token of the conversation")
+    last_read_message: int | None = Field(
+        default=None,
+        description="The message ID that was marked as the last-read marker",
+    )

nextcloud_mcp_server/server/__init__.py

@@ -12,6 +12,7 @@ from .notes import configure_notes_tools
 from .semantic import configure_semantic_tools
 from .sharing import configure_sharing_tools
 from .tables import configure_tables_tools
+from .talk import configure_talk_tools
 from .webdav import configure_webdav_tools
 
 # Canonical mapping of app name → tool registration function.
@@ -29,6 +30,7 @@ AVAILABLE_APPS: dict[str, Callable[[FastMCP], None]] = {
     "cookbook": configure_cookbook_tools,
     "deck": configure_deck_tools,
     "news": configure_news_tools,
+    "talk": configure_talk_tools,
 }
 
 __all__ = [
@@ -43,5 +45,6 @@ __all__ = [
     "configure_semantic_tools",
     "configure_sharing_tools",
     "configure_tables_tools",
+    "configure_talk_tools",
     "configure_webdav_tools",
 ]

nextcloud_mcp_server/server/talk.py

@@ -0,0 +1,225 @@
+"""MCP tool registration for the Nextcloud Talk (spreed) integration."""
+
+import logging
+import uuid
+
+from mcp.server.fastmcp import Context, FastMCP
+from mcp.types import ToolAnnotations
+
+from nextcloud_mcp_server.auth import require_scopes
+from nextcloud_mcp_server.context import get_client
+from nextcloud_mcp_server.models.talk import (
+    GetConversationResponse,
+    ListConversationsResponse,
+    ListMessagesResponse,
+    ListParticipantsResponse,
+    MarkAsReadResponse,
+    SendMessageResponse,
+)
+from nextcloud_mcp_server.observability.metrics import instrument_tool
+
+logger = logging.getLogger(__name__)
+
+
+# spreed advertises a 32000-character limit on chat messages (docs/chat.md);
+# we enforce it client-side for a clearer error than the server's 413.
+_MESSAGE_MAX_LENGTH = 32000
+
+
+def _validate_message_text(message: str) -> None:
+    # Reject both empty strings and whitespace-only strings — spreed
+    # would happily post the latter as a visually-blank message.
+    if not message or not message.strip():
+        raise ValueError("Message text must not be empty or whitespace-only")
+    if len(message) > _MESSAGE_MAX_LENGTH:
+        raise ValueError(
+            f"Message too long: {len(message)} characters (max {_MESSAGE_MAX_LENGTH})"
+        )
+
+
+def configure_talk_tools(mcp: FastMCP) -> None:
+    """Configure Nextcloud Talk (spreed) MCP tools."""
+
+    # Read tools
+
+    @mcp.tool(
+        title="List Talk Conversations",
+        annotations=ToolAnnotations(readOnlyHint=True, openWorldHint=True),
+    )
+    @require_scopes("talk.read")
+    @instrument_tool
+    async def talk_list_conversations(
+        ctx: Context,
+        modified_since: int | None = None,
+        include_status: bool = False,
+    ) -> ListConversationsResponse:
+        """List the user's Talk conversations (rooms).
+
+        Args:
+            modified_since: Optional Unix timestamp; only conversations
+                modified after this time are returned.
+            include_status: Whether to include user-status info for
+                one-to-one conversations.
+        """
+        client = await get_client(ctx)
+        rooms = await client.talk.list_conversations(
+            modified_since=modified_since,
+            include_status=include_status,
+        )
+        return ListConversationsResponse(results=rooms, total=len(rooms))
+
+    @mcp.tool(
+        title="Get Talk Conversation",
+        annotations=ToolAnnotations(readOnlyHint=True, openWorldHint=True),
+    )
+    @require_scopes("talk.read")
+    @instrument_tool
+    async def talk_get_conversation(
+        ctx: Context, token: str
+    ) -> GetConversationResponse:
+        """Get details of a Talk conversation by its token.
+
+        Args:
+            token: Unique room token (returned by ``talk_list_conversations``).
+        """
+        client = await get_client(ctx)
+        conversation = await client.talk.get_conversation(token)
+        return GetConversationResponse(conversation=conversation)
+
+    @mcp.tool(
+        title="Get Talk Messages",
+        annotations=ToolAnnotations(readOnlyHint=True, openWorldHint=True),
+    )
+    @require_scopes("talk.read")
+    @instrument_tool
+    async def talk_get_messages(
+        ctx: Context,
+        token: str,
+        limit: int = 50,
+        last_known_message_id: int | None = None,
+        include_last_known: bool = False,
+    ) -> ListMessagesResponse:
+        """Read chat history for a Talk conversation.
+
+        Returns the most recent messages (older first when paginated).
+        Does not move the user's read marker; call
+        ``talk_mark_as_read`` separately if desired.
+
+        Args:
+            token: Conversation token.
+            limit: Max messages per page. Valid range is 1-200 (spreed
+                caps server-side at 200); values outside this range are
+                clamped. Default 50.
+            last_known_message_id: Pagination cursor — pass the
+                ``last_known_message_id`` from the previous response to
+                fetch the next (older) page.
+            include_last_known: Include the cursor message in the page
+                instead of starting just before it.
+        """
+        client = await get_client(ctx)
+        messages, last_given = await client.talk.get_messages(
+            token,
+            limit=limit,
+            last_known_message_id=last_known_message_id,
+            look_into_future=False,
+            set_read_marker=False,
+            include_last_known=include_last_known,
+        )
+        return ListMessagesResponse(
+            conversation_token=token,
+            results=messages,
+            count=len(messages),
+            last_known_message_id=last_given,
+        )
+
+    @mcp.tool(
+        title="List Talk Conversation Participants",
+        annotations=ToolAnnotations(readOnlyHint=True, openWorldHint=True),
+    )
+    @require_scopes("talk.read")
+    @instrument_tool
+    async def talk_list_participants(
+        ctx: Context, token: str, include_status: bool = False
+    ) -> ListParticipantsResponse:
+        """List the participants of a Talk conversation.
+
+        Args:
+            token: Conversation token.
+            include_status: Include each participant's user-status info.
+        """
+        client = await get_client(ctx)
+        participants = await client.talk.list_participants(
+            token, include_status=include_status
+        )
+        return ListParticipantsResponse(
+            conversation_token=token,
+            results=participants,
+            count=len(participants),
+        )
+
+    # Write tools
+
+    @mcp.tool(
+        title="Send Talk Message",
+        annotations=ToolAnnotations(idempotentHint=False, openWorldHint=True),
+    )
+    @require_scopes("talk.write")
+    @instrument_tool
+    async def talk_send_message(
+        ctx: Context,
+        token: str,
+        message: str,
+        reply_to: int | None = None,
+        silent: bool = False,
+    ) -> SendMessageResponse:
+        """Post a chat message into a Talk conversation as the user.
+
+        A random ``referenceId`` is attached so spreed dedupes the post
+        if the request is retried.
+
+        Args:
+            token: Conversation token.
+            message: Message text (max 32000 characters).
+            reply_to: Optional parent message ID to thread the reply.
+            silent: When True the message is delivered without push
+                notifications (e.g. for status updates).
+        """
+        _validate_message_text(message)
+        client = await get_client(ctx)
+        posted = await client.talk.send_message(
+            token,
+            message,
+            reply_to=reply_to,
+            # 32 hex chars, no dashes — spreed accepts either UUID format.
+            reference_id=uuid.uuid4().hex,
+            silent=silent,
+        )
+        return SendMessageResponse(message=posted)
+
+    @mcp.tool(
+        title="Mark Talk Conversation as Read",
+        annotations=ToolAnnotations(idempotentHint=True, openWorldHint=True),
+    )
+    @require_scopes("talk.write")
+    @instrument_tool
+    async def talk_mark_as_read(
+        ctx: Context,
+        token: str,
+        last_read_message: int | None = None,
+    ) -> MarkAsReadResponse:
+        """Move the user's read marker forward in a Talk conversation.
+
+        Args:
+            token: Conversation token.
+            last_read_message: Optional message ID to mark as the new
+                read position. When omitted, spreed marks everything
+                currently in the room as read.
+        """
+        client = await get_client(ctx)
+        await client.talk.mark_as_read(token, last_read_message=last_read_message)
+        return MarkAsReadResponse(
+            success=True,
+            message="Conversation marked as read",
+            conversation_token=token,
+            last_read_message=last_read_message,
+        )

tests/client/conftest.py

@@ -358,6 +358,85 @@ def create_mock_deck_comment_response(
     return create_mock_response(status_code=200, json_data=ocs_response)
 
 
+def create_mock_talk_room_response(
+    conversation_id: int = 1,
+    token: str = "abc123",
+    name: str = "Test Conversation",
+    room_type: int = 2,
+    **kwargs,
+) -> httpx.Response:
+    """Create a mock OCS response for a Nextcloud Talk conversation.
+
+    Args:
+        conversation_id: Numeric conversation ID
+        token: Unique room token
+        name: Conversation name
+        room_type: 1=one-to-one, 2=group, 3=public, 4=changelog
+        **kwargs: Additional conversation fields (override defaults)
+
+    Returns:
+        Mock httpx.Response with conversation data wrapped in OCS format.
+    """
+    room_data = {
+        "id": conversation_id,
+        "token": token,
+        "type": room_type,
+        "name": name,
+        "displayName": name,
+        "description": "",
+        "participantType": 1,
+        "unreadMessages": 0,
+        "unreadMention": False,
+        "lastActivity": 1700000000,
+        "lastReadMessage": 0,
+        "lastMessage": [],
+        "readOnly": 0,
+        "isFavorite": False,
+        "notificationLevel": 0,
+        **kwargs,
+    }
+
+    ocs_response = {"ocs": {"meta": {"status": "ok"}, "data": room_data}}
+    return create_mock_response(status_code=200, json_data=ocs_response)
+
+
+def create_mock_talk_message_response(
+    message_id: int = 1,
+    token: str = "abc123",
+    text: str = "Hello, world!",
+    actor_id: str = "testuser",
+    **kwargs,
+) -> httpx.Response:
+    """Create a mock OCS response for a Nextcloud Talk chat message.
+
+    Args:
+        message_id: Numeric message ID
+        token: Conversation token the message belongs to
+        text: Message body
+        actor_id: User ID of the message author
+        **kwargs: Additional message fields (override defaults)
+
+    Returns:
+        Mock httpx.Response with message data wrapped in OCS format.
+    """
+    message_data = {
+        "id": message_id,
+        "token": token,
+        "actorType": "users",
+        "actorId": actor_id,
+        "actorDisplayName": "Test User",
+        "timestamp": 1700000000,
+        "systemMessage": "",
+        "messageType": "comment",
+        "message": text,
+        "messageParameters": {},
+        **kwargs,
+    }
+
+    ocs_response = {"ocs": {"meta": {"status": "ok"}, "data": message_data}}
+    return create_mock_response(status_code=200, json_data=ocs_response)
+
+
 def create_mock_tables_list_response(
     tables: list[dict] = None,
 ) -> httpx.Response:

tests/client/talk/test_talk_api.py

@@ -0,0 +1,465 @@
+"""Unit tests for the Nextcloud Talk (spreed) HTTP client."""
+
+import logging
+
+import httpx
+import pytest
+
+from nextcloud_mcp_server.client.talk import TalkClient, _validate_token
+from nextcloud_mcp_server.models.talk import (
+    TalkConversation,
+    TalkMessage,
+    TalkParticipant,
+)
+from tests.client.conftest import (
+    create_mock_error_response,
+    create_mock_response,
+    create_mock_talk_message_response,
+    create_mock_talk_room_response,
+)
+
+logger = logging.getLogger(__name__)
+pytestmark = pytest.mark.unit
+
+
+# Token validation
+
+
+@pytest.mark.parametrize(
+    "bad_token",
+    [
+        "",
+        "../foo",
+        "a/b",
+        "a b",
+        "a.b",
+        "a-b",
+        "token!",
+    ],
+)
+def test_validate_token_rejects_invalid(bad_token):
+    """_validate_token rejects anything outside the alphanumeric whitelist."""
+    with pytest.raises(ValueError, match="Invalid Talk conversation token"):
+        _validate_token(bad_token)
+
+
+@pytest.mark.parametrize("good_token", ["a1b2c3d4", "ABC123", "abcdef", "1"])
+def test_validate_token_accepts_valid(good_token):
+    """Real spreed tokens — short alphanumeric strings — pass through."""
+    _validate_token(good_token)
+
+
+async def test_talk_get_conversation_rejects_path_traversal(mocker):
+    """Pathological tokens never reach the HTTP layer."""
+    mock_make_request = mocker.patch.object(TalkClient, "_make_request")
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    with pytest.raises(ValueError, match="Invalid Talk conversation token"):
+        await client.get_conversation("../etc/passwd")
+
+    mock_make_request.assert_not_called()
+
+
+# Conversation tests
+
+
+async def test_talk_list_conversations(mocker):
+    """list_conversations parses the OCS-wrapped room list."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={
+            "ocs": {
+                "meta": {"status": "ok"},
+                "data": [
+                    {
+                        "id": 1,
+                        "token": "abc",
+                        "type": 2,
+                        "name": "Group 1",
+                        "displayName": "Group 1",
+                        "lastMessage": [],
+                    },
+                    {
+                        "id": 2,
+                        "token": "def",
+                        "type": 3,
+                        "name": "Public Room",
+                        "displayName": "Public Room",
+                        "lastMessage": [],
+                    },
+                ],
+            }
+        },
+    )
+
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    rooms = await client.list_conversations()
+
+    assert len(rooms) == 2
+    assert all(isinstance(r, TalkConversation) for r in rooms)
+    assert rooms[0].token == "abc"
+    assert rooms[1].room_type == 3
+
+    mock_make_request.assert_called_once()
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "GET"
+    assert call_args[0][1] == "/ocs/v2.php/apps/spreed/api/v4/room"
+    # noStatusUpdate defaults to True
+    assert call_args[1]["params"]["noStatusUpdate"] == 1
+
+
+async def test_talk_list_conversations_with_modified_since(mocker):
+    """modifiedSince and includeStatus are forwarded as query params."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.list_conversations(modified_since=1700000000, include_status=True)
+
+    params = mock_make_request.call_args[1]["params"]
+    assert params["modifiedSince"] == 1700000000
+    assert params["includeStatus"] == 1
+
+
+async def test_talk_get_conversation(mocker):
+    """get_conversation parses the OCS-wrapped room object."""
+    mock_response = create_mock_talk_room_response(
+        conversation_id=42, token="xyz", name="My Room"
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    room = await client.get_conversation("xyz")
+
+    assert isinstance(room, TalkConversation)
+    assert room.id == 42
+    assert room.token == "xyz"
+    assert room.name == "My Room"
+
+    assert mock_make_request.call_args[0][0] == "GET"
+    assert "/api/v4/room/xyz" in mock_make_request.call_args[0][1]
+
+
+async def test_talk_get_conversation_not_found(mocker):
+    """A 404 from spreed propagates as HTTPStatusError."""
+    error_response = create_mock_error_response(404, "Conversation not found")
+    mock_make_request = mocker.patch.object(TalkClient, "_make_request")
+    mock_make_request.side_effect = httpx.HTTPStatusError(
+        "404 Not Found",
+        request=httpx.Request("GET", "http://test.local"),
+        response=error_response,
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    with pytest.raises(httpx.HTTPStatusError) as excinfo:
+        await client.get_conversation("nope")
+    assert excinfo.value.response.status_code == 404
+
+
+async def test_talk_create_conversation(mocker):
+    """create_conversation builds the right POST body."""
+    mock_response = create_mock_talk_room_response(
+        conversation_id=10, token="new", name="New Room"
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    room = await client.create_conversation(room_name="New Room")
+
+    assert room.token == "new"
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "POST"
+    assert call_args[1]["json"] == {"roomType": 2, "roomName": "New Room"}
+
+
+async def test_talk_delete_conversation(mocker):
+    """delete_conversation issues DELETE on the room URL."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.delete_conversation("doomed")
+
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "DELETE"
+    assert "/api/v4/room/doomed" in call_args[0][1]
+
+
+# Chat tests
+
+
+async def test_talk_get_messages(mocker):
+    """get_messages parses the OCS-wrapped message list."""
+    mock_response = create_mock_response(
+        status_code=200,
+        headers={"X-Chat-Last-Given": "100"},
+        json_data={
+            "ocs": {
+                "meta": {"status": "ok"},
+                "data": [
+                    {
+                        "id": 101,
+                        "token": "abc",
+                        "actorType": "users",
+                        "actorId": "alice",
+                        "actorDisplayName": "Alice",
+                        "timestamp": 1700000000,
+                        "messageType": "comment",
+                        "message": "Hi",
+                    },
+                    {
+                        "id": 102,
+                        "token": "abc",
+                        "actorType": "users",
+                        "actorId": "bob",
+                        "actorDisplayName": "Bob",
+                        "timestamp": 1700000010,
+                        "messageType": "comment",
+                        "message": "Hello",
+                    },
+                ],
+            }
+        },
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    messages, last_given = await client.get_messages("abc", limit=20)
+
+    assert len(messages) == 2
+    assert all(isinstance(m, TalkMessage) for m in messages)
+    assert messages[0].id == 101
+    assert messages[1].actorId == "bob"
+    assert last_given == 100
+
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "GET"
+    assert "/chat/abc" in call_args[0][1]
+    params = call_args[1]["params"]
+    assert params["limit"] == 20
+    # Defaults: not look_into_future, not set_read_marker
+    assert params["lookIntoFuture"] == 0
+    assert params["setReadMarker"] == 0
+
+
+async def test_talk_get_messages_pagination_cursor(mocker):
+    """last_known_message_id is forwarded as the spreed cursor param."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    messages, last_given = await client.get_messages(
+        "abc", last_known_message_id=500, include_last_known=True
+    )
+
+    assert messages == []
+    assert last_given is None  # No header on this response
+
+    params = mock_make_request.call_args[1]["params"]
+    assert params["lastKnownMessageId"] == 500
+    assert params["includeLastKnown"] == 1
+
+
+async def test_talk_get_messages_invalid_last_given_header(mocker, caplog):
+    """A non-numeric X-Chat-Last-Given falls back to None and logs a warning."""
+    mock_response = create_mock_response(
+        status_code=200,
+        headers={"X-Chat-Last-Given": "not-a-number"},
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mocker.patch.object(TalkClient, "_make_request", return_value=mock_response)
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    with caplog.at_level(logging.WARNING, logger="nextcloud_mcp_server.client.talk"):
+        messages, last_given = await client.get_messages("abc")
+
+    assert messages == []
+    assert last_given is None
+    assert any(
+        "Invalid X-Chat-Last-Given" in record.message for record in caplog.records
+    ), "Expected a warning log for the malformed header"
+
+
+async def test_talk_send_message(mocker):
+    """send_message posts the message text and parses the response."""
+    mock_response = create_mock_talk_message_response(
+        message_id=999, token="abc", text="Posted from MCP"
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    posted = await client.send_message("abc", "Posted from MCP")
+
+    assert isinstance(posted, TalkMessage)
+    assert posted.id == 999
+    assert posted.message == "Posted from MCP"
+
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "POST"
+    assert "/chat/abc" in call_args[0][1]
+    body = call_args[1]["json"]
+    assert body["message"] == "Posted from MCP"
+    # Optional fields are not sent unless explicitly set
+    assert "replyTo" not in body
+    assert "referenceId" not in body
+    assert "silent" not in body
+
+
+async def test_talk_send_message_with_reference_id_and_reply(mocker):
+    """send_message forwards reply_to, reference_id, silent."""
+    mock_response = create_mock_talk_message_response(
+        message_id=1000, token="abc", text="A reply"
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.send_message(
+        "abc",
+        "A reply",
+        reply_to=999,
+        reference_id="dedupe-token",
+        silent=True,
+    )
+
+    body = mock_make_request.call_args[1]["json"]
+    assert body == {
+        "message": "A reply",
+        "replyTo": 999,
+        "referenceId": "dedupe-token",
+        "silent": True,
+    }
+
+
+async def test_talk_mark_as_read_no_message(mocker):
+    """mark_as_read with no message ID sends no body (json=None)."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.mark_as_read("abc")
+
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "POST"
+    assert "/chat/abc/read" in call_args[0][1]
+    # Empty body is sent as ``json=None`` so httpx skips both the body and
+    # the ``Content-Type: application/json`` header for this bodyless POST.
+    assert call_args[1]["json"] is None
+
+
+async def test_talk_mark_as_read_with_message(mocker):
+    """mark_as_read sends lastReadMessage when provided."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.mark_as_read("abc", last_read_message=500)
+
+    assert mock_make_request.call_args[1]["json"] == {"lastReadMessage": 500}
+
+
+# Participant tests
+
+
+async def test_talk_list_participants(mocker):
+    """list_participants parses the OCS-wrapped participant list."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={
+            "ocs": {
+                "meta": {"status": "ok"},
+                "data": [
+                    {
+                        "attendeeId": 1,
+                        "actorType": "users",
+                        "actorId": "alice",
+                        "displayName": "Alice",
+                        "participantType": 1,
+                        "inCall": 0,
+                        "lastPing": 1700000000,
+                    },
+                    {
+                        "attendeeId": 2,
+                        "actorType": "users",
+                        "actorId": "bob",
+                        "displayName": "Bob",
+                        "participantType": 3,
+                        "inCall": 0,
+                        "lastPing": 1700000000,
+                    },
+                ],
+            }
+        },
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    participants = await client.list_participants("abc")
+
+    assert len(participants) == 2
+    assert all(isinstance(p, TalkParticipant) for p in participants)
+    assert participants[0].actorId == "alice"
+    assert participants[1].participantType == 3
+
+    call_args = mock_make_request.call_args
+    assert call_args[0][0] == "GET"
+    assert "/api/v4/room/abc/participants" in call_args[0][1]
+    # Default: include_status off → no includeStatus param
+    assert "includeStatus" not in call_args[1].get("params", {})
+
+
+async def test_talk_list_participants_with_include_status(mocker):
+    """include_status=True forwards includeStatus=1 as a query param."""
+    mock_response = create_mock_response(
+        status_code=200,
+        json_data={"ocs": {"meta": {"status": "ok"}, "data": []}},
+    )
+    mock_make_request = mocker.patch.object(
+        TalkClient, "_make_request", return_value=mock_response
+    )
+
+    client = TalkClient(mocker.AsyncMock(spec=httpx.AsyncClient), "testuser")
+    await client.list_participants("abc", include_status=True)
+
+    params = mock_make_request.call_args[1]["params"]
+    assert params["includeStatus"] == 1

tests/conftest.py

@@ -38,7 +38,8 @@ DEFAULT_FULL_SCOPES = (
     "deck.read deck.write "
     "tables.read tables.write "
     "files.read files.write "
-    "sharing.read sharing.write"
+    "sharing.read sharing.write "
+    "talk.read talk.write"
 )
 
 # Read-only scopes (all read scopes across apps) - should match DEFAULT_FULL_SCOPES read portion
@@ -52,7 +53,8 @@ DEFAULT_READ_SCOPES = (
     "deck.read "
     "tables.read "
     "files.read "
-    "sharing.read"
+    "sharing.read "
+    "talk.read"
 )
 
 # Write-only scopes (all write scopes across apps) - should match DEFAULT_FULL_SCOPES write portion
@@ -66,7 +68,8 @@ DEFAULT_WRITE_SCOPES = (
     "deck.write "
     "tables.write "
     "files.write "
-    "sharing.write"
+    "sharing.write "
+    "talk.write"
 )
 
 
@@ -916,6 +919,43 @@ async def temporary_board_with_card(
                 logger.error(f"Unexpected error deleting temporary card {card.id}: {e}")
 
 
+@pytest.fixture
+async def temporary_conversation(nc_client: NextcloudClient):
+    """Create a temporary Talk conversation and clean it up after the test.
+
+    Yields a dict with the room ``token``, ``id``, and ``name``.
+    """
+    unique_suffix = uuid.uuid4().hex[:8]
+    room_name = f"MCP Test Room {unique_suffix}"
+    token = None
+
+    logger.info(f"Creating temporary Talk conversation: {room_name}")
+    try:
+        room = await nc_client.talk.create_conversation(room_name=room_name)
+        token = room.token
+        logger.info(f"Temporary Talk conversation created (token={token})")
+        yield {"token": token, "id": room.id, "name": room_name}
+
+    finally:
+        if token:
+            logger.info(f"Cleaning up temporary Talk conversation token={token}")
+            try:
+                await nc_client.talk.delete_conversation(token)
+                logger.info(f"Successfully deleted Talk conversation token={token}")
+            except HTTPStatusError as e:
+                if e.response.status_code not in [404, 403]:
+                    logger.error(f"HTTP error deleting Talk conversation {token}: {e}")
+                else:
+                    logger.warning(
+                        f"Talk conversation {token} already deleted or access denied "
+                        f"({e.response.status_code})."
+                    )
+            except Exception as e:
+                logger.error(
+                    f"Unexpected error deleting Talk conversation {token}: {e}"
+                )
+
+
 @pytest.fixture(scope="session")
 def shared_test_calendar_name():
     """Unique calendar name for the entire test session."""

tests/server/test_talk_mcp.py

@@ -0,0 +1,163 @@
+"""Integration tests for the Nextcloud Talk (spreed) MCP tools."""
+
+import json
+import logging
+
+import pytest
+from mcp import ClientSession
+
+from nextcloud_mcp_server.client import NextcloudClient
+
+logger = logging.getLogger(__name__)
+pytestmark = pytest.mark.integration
+
+
+EXPECTED_TALK_TOOLS = {
+    "talk_list_conversations",
+    "talk_get_conversation",
+    "talk_get_messages",
+    "talk_list_participants",
+    "talk_send_message",
+    "talk_mark_as_read",
+}
+
+
+async def test_talk_mcp_connectivity(nc_mcp_client: ClientSession):
+    """All six Talk tools should be registered with the MCP server."""
+    tools = await nc_mcp_client.list_tools()
+    tool_names = {tool.name for tool in tools.tools}
+
+    missing = EXPECTED_TALK_TOOLS - tool_names
+    assert not missing, f"Missing Talk tools: {missing}"
+
+
+async def test_talk_send_and_read_workflow(
+    nc_mcp_client: ClientSession,
+    nc_client: NextcloudClient,
+    temporary_conversation: dict,
+):
+    """End-to-end: post a message via MCP, read it back, mark read."""
+    token = temporary_conversation["token"]
+
+    # 1. Send a message via MCP
+    send_result = await nc_mcp_client.call_tool(
+        "talk_send_message",
+        {"token": token, "message": "Hello from MCP integration test"},
+    )
+    assert send_result.isError is False, (
+        f"talk_send_message failed: {send_result.content}"
+    )
+    send_payload = json.loads(send_result.content[0].text)
+    assert send_payload["success"] is True
+    posted = send_payload["message"]
+    assert posted["message"] == "Hello from MCP integration test"
+    assert posted["token"] == token
+    posted_id = posted["id"]
+    logger.info(f"Posted message id={posted_id} into token={token}")
+
+    # 2. Cross-check via direct client
+    direct_messages, _ = await nc_client.talk.get_messages(token, limit=10)
+    direct_ids = [m.id for m in direct_messages]
+    assert posted_id in direct_ids, "Posted message not visible via direct client"
+
+    # 3. Read messages via MCP
+    get_result = await nc_mcp_client.call_tool(
+        "talk_get_messages", {"token": token, "limit": 10}
+    )
+    assert get_result.isError is False, (
+        f"talk_get_messages failed: {get_result.content}"
+    )
+    get_payload = json.loads(get_result.content[0].text)
+    assert get_payload["conversation_token"] == token
+    listed_ids = [m["id"] for m in get_payload["results"]]
+    assert posted_id in listed_ids, "Posted message not in MCP get_messages results"
+
+    # 4. Mark conversation as read up to that message
+    mark_result = await nc_mcp_client.call_tool(
+        "talk_mark_as_read",
+        {"token": token, "last_read_message": posted_id},
+    )
+    assert mark_result.isError is False, (
+        f"talk_mark_as_read failed: {mark_result.content}"
+    )
+    mark_payload = json.loads(mark_result.content[0].text)
+    assert mark_payload["success"] is True
+    assert mark_payload["conversation_token"] == token
+    assert mark_payload["last_read_message"] == posted_id
+
+
+async def test_talk_list_conversations_includes_temp_room(
+    nc_mcp_client: ClientSession, temporary_conversation: dict
+):
+    """Newly created conversation should appear in talk_list_conversations."""
+    token = temporary_conversation["token"]
+
+    list_result = await nc_mcp_client.call_tool("talk_list_conversations", {})
+    assert list_result.isError is False, (
+        f"talk_list_conversations failed: {list_result.content}"
+    )
+    payload = json.loads(list_result.content[0].text)
+    tokens = [r["token"] for r in payload["results"]]
+    assert token in tokens, "Temporary conversation not found in list"
+
+
+async def test_talk_get_conversation(
+    nc_mcp_client: ClientSession, temporary_conversation: dict
+):
+    """talk_get_conversation returns the same room we created."""
+    token = temporary_conversation["token"]
+    name = temporary_conversation["name"]
+
+    result = await nc_mcp_client.call_tool("talk_get_conversation", {"token": token})
+    assert result.isError is False, f"talk_get_conversation failed: {result.content}"
+    payload = json.loads(result.content[0].text)
+    conversation = payload["conversation"]
+    assert conversation["token"] == token
+    assert conversation["name"] == name
+
+
+async def test_talk_list_participants(
+    nc_mcp_client: ClientSession, temporary_conversation: dict
+):
+    """talk_list_participants returns the room creator as a participant."""
+    token = temporary_conversation["token"]
+
+    result = await nc_mcp_client.call_tool("talk_list_participants", {"token": token})
+    assert result.isError is False, f"talk_list_participants failed: {result.content}"
+    payload = json.loads(result.content[0].text)
+    assert payload["conversation_token"] == token
+    actor_ids = [p["actorId"] for p in payload["results"]]
+    # The user that created the room is always a participant.
+    assert len(actor_ids) >= 1
+
+
+@pytest.mark.parametrize("blank_text", ["", "   ", "\t\n", " \t \n "])
+async def test_talk_send_message_validation_blank_text(
+    nc_mcp_client: ClientSession,
+    temporary_conversation: dict,
+    blank_text: str,
+):
+    """Empty and whitespace-only message text are rejected client-side."""
+    token = temporary_conversation["token"]
+
+    result = await nc_mcp_client.call_tool(
+        "talk_send_message", {"token": token, "message": blank_text}
+    )
+    assert result.isError is True, (
+        f"Expected validation error for blank message {blank_text!r}"
+    )
+
+
+async def test_talk_send_message_validation_too_long(
+    nc_mcp_client: ClientSession, temporary_conversation: dict
+):
+    """A message exceeding the 32000-char ceiling is rejected client-side."""
+    token = temporary_conversation["token"]
+
+    result = await nc_mcp_client.call_tool(
+        "talk_send_message",
+        {"token": token, "message": "x" * 32001},
+    )
+    assert result.isError is True, (
+        "Expected validation error for message longer than 32000 characters"
+    )