Integration
Connect Google Calendar and Slack
When Attendee Response Changed fires in Google Calendar, your agent runs Send Direct Message in Slack, or New Mention (instant) in Slack to Create Event in Google Calendar. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Google Calendar and Slack to do together?
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https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Google Calendar holds the meetings and Slack is where people notice things. Connecting them lets a calendar event announce itself in the right channel, a cancellation reach the people who planned around it, and a starred Slack message turn into an event. It also works the other way, so a mention in Slack can check free time in Google Calendar.
Example flows
What Google Calendar and Slack can do together
From Google Calendar to Slack
When Attendee Response Changed in Google Calendar
then Send Direct Message in Slack
When Event Canceled or Deleted in Google Calendar
then Send Message in Slack
From Slack to Google Calendar
When New Mention (instant) in Slack
then Create Event in Google Calendar
When New Saved Message in Slack
then Update Event in Google Calendar
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with Google Calendar and Slack
Triggers and actions 21 triggers · 105 actions
Trigger
Attendee Response ChangedPolling trigger that fires when any attendee's RSVP changes to accepted, declined, or tentative. Returns attendee info and current status.
Trigger
Calendar Event SyncPolling trigger that returns full event data including details, attendees, and metadata. For real-time notifications with basic info, use Calendar Event Changes (webhook).
Trigger
Event Canceled or DeletedTriggers when a Google Calendar event is cancelled or deleted. Returns minimal data: event_id, summary (if available), and cancellation timestamp.
Trigger
Event CreatedPolling trigger that fires when a new calendar event is created. Returns event ID, summary, start/end times, and organizer info.
Trigger
Event Starting SoonTriggers when a calendar event is within a configured number of minutes from starting. Returns event details, time remaining, attendees, and join links when available.
Trigger
Event UpdatedTriggers when an existing Google Calendar event is modified. Returns the event ID, change type, and the specific fields that changed with their previous and new values.
Action
Acl DeleteDeletes an access control rule from a Google Calendar. Use when you need to remove sharing permissions for a user, group, or domain.
Action
Acl GetRetrieves a specific access control rule for a calendar. Use when you need to check permissions for a specific user, group, or domain.
Action
Acl InsertCreates an access control rule for a calendar. Use when you need to grant sharing permissions to a user, group, or domain.
Action
Acl ListRetrieves the list of access control rules (ACLs) for a specified calendar, providing the necessary 'rule_id' values required for updating specific ACL rules.
Action
Acl PatchUpdates an existing access control rule for a calendar using patch semantics (partial update). This allows modifying specific fields without affecting other properties. IMPORTANT: The ACL rule must already exist on the calendar. This action cannot create new rules. If you receive a 404 Not Found error, the rule does not exist - use ACL insert to create it first, or use ACL list to verify available rules. Each patch request consumes three quota units. For domain-type ACL rules, if PATCH fails with 500 error, this action will automatically fallback to UPDATE method.
Action
Acl UpdateUpdates an access control rule for the specified calendar.
Action
Acl WatchTool to watch for changes to ACL resources. Use when you need to set up real-time notifications for access control list modifications on a calendar.
Action
Batch EventsExecute up to 1000 event mutations (create/patch/delete) in one Google Calendar HTTP batch request with per-item status/results. Use this to materially reduce round-trips for bulk operations like migrations, cleanup, or large-scale updates.
Action
Calendar List DeleteTool to remove a calendar from the user's calendar list. Use when you need to unsubscribe from or hide a calendar from the user's list.
Action
Calendar List GetRetrieves metadata for a SINGLE specific calendar from the user's calendar list by its calendar ID. This action requires a calendarId parameter and returns details about that one calendar only. NOTE: This does NOT list all calendars. To list all calendars in the user's calendar list, use GOOGLECALENDAR_CALENDAR_LIST_LIST instead.
Action
Calendar List InsertInserts an existing calendar into the user's calendar list.
Action
Calendar List PatchUpdates an existing calendar on the user's calendar list using patch semantics. This method allows partial updates, modifying only the specified fields.
Action
Calendar List UpdateUpdates an existing entry on the user\'s calendar list.
Action
Calendar List WatchWatch for changes to CalendarList resources using push notifications. Use this to receive real-time updates when calendar list entries are modified.
Action
Calendars DeleteDeletes a secondary calendar. use calendars.clear for clearing all events on primary calendars.
Action
Calendars UpdateUpdates metadata for a calendar.
Action
Channels StopTool to stop watching resources through a notification channel. Use when you need to discontinue push notifications for a specific channel subscription.
Action
Create CalendarCreates a new secondary Google Calendar with the specified title and optional settings. Use this action when you need to create a new calendar for organizing events separately from the primary calendar. The authenticated user becomes the owner of the newly created calendar. Optional parameters include description, location, and timezone.
Action
Create EventCreates an event on a google calendar, needing rfc3339 utc start/end times (end after start) and write access to the calendar. by default, adds the organizer as an attendee unless exclude organizer is set to true.
Action
Delete EventDeletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
Action
Duplicate CalendarCreates a new, empty google calendar with the specified title (summary).
Action
Events GetRetrieves a SINGLE event by its unique event_id (REQUIRED). This action does NOT list or search events - it fetches ONE specific event when you already know its ID. If you want to list events within a time range, search for events, or filter by criteria like time_min/time_max, use GOOGLECALENDAR_EVENTS_LIST instead.
Action
Events ImportTool to import an event as a private copy to a calendar. Use when you need to add an existing event to a calendar using its iCalUID. Only events with eventType='default' can be imported.
Action
Events InstancesReturns instances of the specified recurring event.
Action
Events ListReturns events on the specified calendar.
Action
Events List All CalendarsReturn a unified event list across all calendars in the user's calendar list for a given time range. Use when you need a single view of all events across multiple calendars. An inverted or incorrect time range silently returns empty results rather than an error. An empty `items` list means no events matched the filters—adjust `time_min`, `time_max`, or `q` before concluding no events exist.
Action
Events MoveMoves an event to another calendar, i.e., changes an event's organizer.
Action
Events WatchWatch for changes to events resources.
Action
Find EventFinds events in a specified google calendar using text query, time ranges (event start/end, last modification), and event types; ensure `timemin` is not chronologically after `timemax` if both are provided.
Action
Find Free SlotsFinds free/busy time slots in google calendars for specified calendars within a defined time range (defaults to the current day utc if `time min`/`time max` are omitted), enhancing busy intervals with event details; `time min` must precede `time max` if both are provided.
Action
Free Busy QueryReturns free/busy information for a set of calendars.
Action
Get CalendarRetrieves a specific google calendar, identified by `calendar id`, to which the authenticated user has access.
Action
Get Current Date TimeGets the current date and time, allowing for a specific timezone offset.
Action
List Acl RulesRetrieves the list of access control rules (acls) for a specified calendar, providing the necessary 'rule id' values required for updating specific acl rules.
Action
List CalendarsRetrieves calendars from the user's google calendar list, with options for pagination and filtering.
Action
Patch CalendarPartially updates (patches) an existing google calendar, modifying only the fields provided; `summary` is mandatory and cannot be an empty string, and an empty string for `description` or `location` clears them.
Action
Patch EventUpdates specified fields of an existing event in a google calendar using patch semantics (array fields like `attendees` are fully replaced if provided); ensure the `calendar id` and `event id` are valid and the user has write access to the calendar.
Action
Quick AddParses natural language text to quickly create a basic google calendar event with its title, date, and time, suitable for simple scheduling; does not support direct attendee addition or recurring events, and `calendar id` must be valid if not 'primary'.
Action
Remove AttendeeRemoves an attendee from a specified event in a google calendar; the calendar and event must exist.
Action
Settings GetTool to return a single user setting for the authenticated user. Use when you need to retrieve a specific calendar setting value.
Action
Settings ListReturns all user settings for the authenticated user.
Action
Settings WatchWatch for changes to settings resources.
Action
Sync EventsSynchronizes google calendar events, performing a full sync if no `sync token` is provided or if a 410 gone error (due to an expired token) necessitates it, otherwise performs an incremental sync for events changed since the `sync token` was issued.
Action
Update Acl RuleUpdates an access control rule for the specified calendar.
Action
Update EventUpdates an existing event by `event id` in a google calendar; this is a full put replacement, so provide all desired fields as unspecified ones may be cleared or reset.
Trigger
New ChannelTriggers when a new channel is created in the workspace.
Trigger
New Channel (instant)Triggers when a new channel is created (Slack event channel_created).
Trigger
New Channel MemberTriggers when a member joins a chosen channel (Slack event member_joined_channel).
Trigger
New File (instant)Triggers when a new file is uploaded to the workspace (Slack event file_created).
Trigger
New Mention (instant)Triggers when a username or keyword is mentioned in a channel. Events API message events with keyword filter.
Trigger
New Message Posted to ChannelTriggers when a message is posted to a chosen channel (Slack event message.channels).
Trigger
New Message Posted to Private ChannelTriggers when a message is posted to a chosen private channel or group DM (Slack events message.groups, message.mpim).
Trigger
New Pinned ItemTriggers when an item is pinned in a channel.
Trigger
New Public Message Posted AnywhereTriggers when a message is posted to any public channel (Slack event message.channels).
Trigger
New Reaction AddedTriggers when an emoji reaction is added to a message (Slack event reaction_added).
Trigger
New Saved MessageTriggers when a message or file is saved (starred) (Slack event star_added).
Trigger
New Team Custom EmojiTriggers when a custom emoji is added to the workspace (Slack event emoji_changed).
Trigger
New Thread ReplyTriggers when a new reply is added to a message thread.
Trigger
New UserTriggers when a new user joins the workspace. Polling; deduped by user id.
Trigger
New User (instant)Triggers when a new user joins the workspace (Slack event team_join).
Action
Add BookmarkAdd a bookmark to a channel.
Action
Add ReactionAdd an emoji reaction to a message.
Action
Add StarSave a message or file by starring it.
Action
Archive ChannelArchive a channel.
Action
Complete ReminderMark a reminder as complete.
Action
Create CanvasCreate a standalone canvas document.
Action
Create ChannelCreate a new public or private channel.
Action
Create Channel CanvasCreate a canvas attached to a channel.
Action
Create ReminderCreate a reminder for a user at a specified time.
Action
Delete CanvasDelete a canvas.
Action
Delete FileDelete a file from the workspace.
Action
Delete MessageDelete a message from a channel by timestamp.
Action
Delete ReminderDelete a reminder.
Action
Delete Scheduled MessageCancel a scheduled message before it is sent.
Action
Edit BookmarkEdit an existing channel bookmark.
Action
Edit CanvasEdit the content of a canvas.
Action
Find Channel by NameList channels filtered to locate a channel by name (client filters the returned list).
Action
Find User by EmailLook up a Slack user by their email address.
Action
Get Channel MessagesFetch the message history of a channel.
Action
Get File InfoGet information about a file.
Action
Get Message PermalinkGet a permanent link to a specific message.
Action
Get Message ReactionsGet the emoji reactions on a message.
Action
Get Team InfoGet information about the workspace.
Action
Get Thread RepliesGet the replies in a message thread.
Action
Get User InfoGet profile information for a Slack user by ID.
Action
Get User PresenceGet a user's current presence status.
Action
Get User ProfileGet a user's profile fields.
Action
Invite User to ChannelInvite one or more users to a channel (comma-separated user IDs).
Action
Join ChannelJoin a public channel.
Action
Leave ChannelLeave a channel.
Action
List BookmarksList the bookmarks in a channel.
Action
List Channel MembersList the members of a channel.
Action
List ChannelsList channels in the workspace (public and private).
Action
List Custom EmojisList the workspace's custom emojis.
Action
List FilesList files in the workspace, optionally filtered by channel or user.
Action
List Pinned ItemsList the items pinned in a channel.
Action
List Scheduled MessagesList messages scheduled to be sent later.
Action
List User GroupsList the workspace's user groups.
Action
List UsersList all users in the workspace.
Action
List User's ChannelsList the channels a user is a member of.
Action
Mark Channel ReadSet the read cursor position in a channel.
Action
Pin MessagePin a message to a channel.
Action
Remove BookmarkRemove a bookmark from a channel.
Action
Remove ReactionRemove an emoji reaction from a message.
Action
Remove StarRemove a star from a message or file.
Action
Remove User from ChannelRemove a member from a channel.
Action
Rename ChannelRename a channel.
Action
Schedule MessageSchedule a message to be sent to a channel at a future Unix time.
Action
Search FilesSearch files across the workspace.
Action
Search MessagesSearch messages across the workspace.
Action
Send Direct MessageOpen a DM with a user and post a message to it.
Action
Send Ephemeral MessageSend a message in a channel that is visible only to one user.
Action
Send MessagePost a message to a channel, private group, or DM.
Action
Set Channel PurposeSet the purpose (description) for a channel.
Action
Set Channel TopicSet the topic for a channel.
Action
Set User PresenceSet the authenticated user's presence status.
Action
Unarchive ChannelRestore an archived channel.
Action
Unpin MessageRemove a pinned message from a channel.
Action
Update MessageUpdate an existing message in a channel by timestamp.
Action
Upload FileUpload a file and share it to one or more channels.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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Questions
Google Calendar and Slack, answered
Can a Slack message create a real event on the calendar?
Yes. A starred message in Slack can feed the Quick Add action in Google Calendar, which reads the plain text and makes an event with a title, date and time. For events that need exact start and end times, the Create Event action can be used instead.
What happens if no Slack channel matches the event?
The Find Channel by Name action returns nothing, and the steps after it are skipped, so no message is posted and the Google Calendar event is left as it is. You can add a fallback that posts to a general channel instead.
What can start an automation from Google Calendar?
Any of Google Calendar's 6 triggers in the catalog, including Attendee Response Changed, Event Canceled or Deleted, Event Created and Event Updated. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Slack when something happens in Google Calendar?
Any of Slack's 60 actions, including Find Channel by Name, Send Direct Message, Send Message and Create Canvas. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Slack to Google Calendar?
Yes. When something happens in Slack, your agent can act in Google Calendar too. This page covers both directions: Slack's triggers and Google Calendar's actions are listed here as well.
Do I have to build a connector for Google Calendar or Slack?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use Google Calendar and Slack without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.