Slack MCP
for AI agents

• add_call_participants write

  Add call participants

  Registers new participants added to a Slack call.

• add_emoji write

  Add emoji

  Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits.

• add_emoji_alias write

  Add an emoji alias

  Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization.

• add_enterprise_user_to_workspace write

  Add Enterprise user to workspace

  Adds an Enterprise user to a workspace. Use when you need to assign an existing Enterprise Grid user to a specific workspace with optional guest restrictions.

• add_reaction_to_an_item write

  Add reaction to message

  Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions.

• add_remote_file write

  Add a remote file

  Adds a reference to an external file (e.g., Google Drive, Dropbox) to Slack for discovery and sharing, requiring a unique `external_id` and an `external_url` accessible by Slack.

• add_star write

  Add a star to an item

  Stars a channel, file, file comment, or a specific message in Slack.

• admin_conversations_search read

  Search for channels in Enterprise organization

  Tool to search for public or private channels in an Enterprise organization. Use when you need to find channels by name, type, or other criteria within an Enterprise Grid workspace.

• api_test read

  Test Slack API connection

  Tool to check API calling code by testing connectivity and authentication to the Slack API. Use when you need to verify that API credentials are valid and the connection is working properly.

• archive_conversation write

  Archive a Slack conversation

  Archives a Slack conversation by its ID, rendering it read-only and hidden while retaining history, ideal for cleaning up inactive channels; be aware that some channels (like #general or certain DMs) cannot be archived and this may impact connected integrations.

• assistant_search_context read

  Real-time search

  Search Slack messages, files, channels, and users via Real-time Search API. For queries referencing entities by name (users/channels/files), first resolve with content_types (users/channels/files) to get exact ID. If multiple matches, ask user to clarify before proceeding (e.g. ask for user email).

• assistant_search_info read

  Check search capabilities

  Check if semantic (AI-powered) search is available on the Slack workspace. Returns whether natural language queries will trigger semantic search in assistant.search.context calls.

• close_dm write

  Close conversation channel

  Closes a Slack direct message (DM) or multi-person direct message (MPDM) channel, removing it from the user's sidebar without deleting history; this action affects only the calling user's view.

• convert_channel_to_private write

  Convert public channel to private

  Convert a public Slack channel to private using the Admin API. This is an Enterprise Grid only feature and requires an org-installed user token with admin.conversations:write scope.

• create_a_reminder write

  Create a reminder

  Creates a Slack reminder with specified text and time; time accepts Unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', 'every Thursday at 2pm').

• create_canvas write

  Create Slack Canvas

  Creates a new Slack Canvas with the specified title and optional content.

• create_channel write

  Create channel

  Initiates a public or private channel-based conversation in a Slack workspace. Immediately creates the channel; invoke only after explicit user confirmation.

• create_channel_based_conversation write

  Create a channel-based conversation

  Creates a new public or private Slack channel with a unique name; the channel can be org-wide, or team-specific if `team_id` is given (required if `org_wide` is false or not provided).

• create_enterprise_team write

  Create Enterprise team

  Tool to create an Enterprise team in Slack. Use when you need to create a new team (workspace) within an Enterprise Grid organization. Requires admin.teams:write scope.

• create_slack_list write

  Create Slack List

  Creates a new Slack List via `slackLists.create`. Provide a `name` and, optionally, a `description_blocks` description and a `schema` of typed columns. You can instead copy an existing List's structure with `copy_from_list_id` (and its rows via `include_copied_list_records`), or enable task-tracking columns with `todo_mode`. Returns the new List's `list_id`. Requires a user token with the `lists:write` scope.

• create_slack_list_item write

  Create Slack List item

  Creates a new item (row) in a Slack List via `slackLists.items.create`. Set initial cell values with `initial_fields`; text columns require Block Kit `rich_text` (a plain string is wrapped automatically). Optionally duplicate an existing row with `duplicated_item_id` or create a subtask with `parent_item_id`. Requires a user token with the `lists:write` scope.

• create_user_group write

  Create a Slack user group

  Creates a new User Group (often referred to as a subteam) in a Slack workspace.

• customize_url_unfurl write

  Customize URL unfurl

  Customizes URL previews (unfurling) in a specific Slack message using a URL-encoded JSON in `unfurls` to define custom content or remove existing previews.

• delete_canvas write

  Delete Slack Canvas

  Deletes a Slack Canvas permanently and irreversibly. Always confirm with the user before calling this tool.

• delete_channel write

  Delete a public or private channel

  Permanently and irreversibly deletes a specified public or private channel, including all its messages and files, within a Slack Enterprise Grid organization.

• delete_file write

  Delete a file by ID

  Permanently deletes an existing file from a Slack workspace using its unique file ID; this action is irreversible and also removes any associated comments or shares.

• delete_file_comment write

  Delete file comment

  Deletes a specific comment from a file in Slack; this action is irreversible.

• delete_multiple_slack_list_items write

  Delete multiple Slack List items

  Deletes several items (rows) from a Slack List in one call via `slackLists.items.deleteMultiple`. This operation is ALL-OR-NOTHING: Slack returns a single `{"ok": true}` on success or `{"ok": false, "error": ...}` on failure, with NO per-item result array, so partial state cannot be reported. On failure, treat the whole batch as not deleted and retry the entire batch. Requires a user token with the `lists:write` scope.

• delete_reminder write

  Delete a Slack reminder

  Deletes an existing Slack reminder, typically when it is no longer relevant or a task is completed; this operation is irreversible.

• deletes_a_message_from_a_chat write

  Delete a message from a chat

  Deletes a message, identified by its channel ID and timestamp, from a Slack channel, private group, or direct message conversation; the authenticated user or bot must be the original poster.

• delete_scheduled_message write

  Delete scheduled chat message

  Deletes a pending, unsent scheduled message from the specified Slack channel, identified by its `scheduled_message_id`.

• delete_slack_list_access write

  Delete Slack List access

  Revokes sharing access on a Slack List via `slackLists.access.delete`. Provide the `list_id` and EXACTLY ONE of `channel_ids` or `user_ids` (they are mutually exclusive) to remove access for those channels or users. Requires a user token with the `lists:write` scope.

• delete_slack_list_item write

  Delete Slack List item

  Deletes an item (row) from a Slack List via `slackLists.items.delete`. Identify the List with `list_id` and the row to remove with `id`. Deletion is permanent and cannot be undone. Requires a user token with the `lists:write` scope.

• delete_user_profile_photo write

  Delete user profile photo

  Deletes the Slack profile photo for the user identified by the token, reverting them to the default avatar; this action is irreversible and succeeds even if no custom photo was set.

• disable_user_group write

  Disable a Slack user group

  Disables a specified, currently enabled Slack User Group by its unique ID, effectively archiving it by setting its 'date_delete' timestamp; the group is not permanently deleted and can be re-enabled.

• download_slack_file read

  Download Slack file

  Tool to download Slack file content and convert it to a publicly accessible URL. Use when you need to retrieve and download files that have been shared in Slack channels or conversations.

• edit_canvas write

  Edit Slack Canvas

  Edits a Slack Canvas with granular control over content placement. Supports replace, insert (before/after/start/end) operations for flexible content management.

• enable_public_sharing_of_a_file write

  Share file public url

  Enables public sharing for an existing Slack file by generating a publicly accessible URL; this action does not create new files. Once enabled, the file is accessible to anyone with the URL — verify intent before sharing sensitive or confidential files.

• enable_user_group write

  Enable a user group

  Enables a disabled User Group in Slack using its ID, reactivating it for mentions and permissions; this action only changes the enabled status and cannot create new groups or modify other properties.

• end_call write

  End a call

  Ends an ongoing Slack call, identified by its ID (obtained from `calls.add`), optionally specifying the call's duration.

• end_dnd write

  End DND session

  Ends the authenticated user's current Do Not Disturb (DND) session in Slack, affecting only DND status and making them available; if DND is not active, Slack acknowledges the request without changing status.

• end_snooze write

  End snooze

  Ends the current user's snooze mode immediately.

• fetch_conversation_history read

  Fetch conversation history

  Fetches a chronological list of messages and events from a specified Slack conversation, accessible by the authenticated user/bot, with options for pagination and time range filtering. IMPORTANT LIMITATION: This action only returns messages from the main channel timeline. Threaded replies are NOT returned by this endpoint. To retrieve threaded replies, use the SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION action (conversations.replies API) instead. The oldest/latest timestamp filters work reliably for filtering the main channel timeline, but cannot be used to retrieve individual threaded replies - even if you know the exact reply timestamp, setting oldest=latest to that timestamp will return an empty messages array. To get threaded replies: 1. Use this action to get parent messages (which include thread_ts, reply_count, latest_reply fields) 2. Use SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION with the parent's thread_ts to fetch all replies in that thread

• fetch_item_reactions read

  Fetch item reactions

  Fetches reactions for a Slack message, file, or file comment. Exactly one identifier path must be provided: `channel`+`timestamp`, `file`, or `file_comment`. Mixing identifiers (e.g., providing both `channel`+`timestamp` and `file`) causes errors. If the response omits the `reactions` field, the item has zero reactions.

• fetch_message_thread_from_a_conversation read

  Retrieve conversation replies

  Retrieves replies to a specific parent message in a Slack conversation, using the channel ID and the parent message's timestamp (`ts`). Note: The parent message in the response contains metadata (reply_count, reply_users, latest_reply) that indicates expected thread activity. If the returned messages array contains fewer replies than reply_count indicates, check: (1) has_more=true means pagination is needed, (2) recently posted replies may have timing delays, (3) some replies may be filtered by permissions or deleted. The composio_execution_message field will warn about any detected mismatches.

• fetch_team_info read

  Fetch team info

  Fetches comprehensive metadata about the current Slack team, or a specified team if the provided ID is accessible.

• find_channels read

  Find channels

  Find channels in a Slack workspace by any criteria - name, topic, purpose, or description. Returns channel IDs (C*/G* prefixed) required by most Slack tools — always resolve names to IDs here before passing to other tools. NOTE: This action searches channels and conversations visible to the authenticated user. Empty results may indicate: - No channels match the search query in name, topic, or purpose - The target private channel or DM is not accessible to the authenticated user because they are not a member - The connection lacks required read scopes (channels:read, groups:read, im:read, mpim:read). If empty, retry with exact_match=false or exclude_archived=false to avoid false negatives. In large workspaces, paginate using next_cursor to avoid missing matches. Check 'composio_execution_message' and 'total_channels_searched' in the response for details.

• find_user_by_email_address read

  Lookup users by email

  Retrieves the Slack user object for an active user by their registered email address; requires the users:read.email OAuth scope. Fails with 'users_not_found' if the email is unregistered, the user is inactive, the account is a guest, or the email is hidden by workspace privacy settings.

• find_users read

  Find users

  Find users in a Slack workspace by any criteria - email, name, display name, or other text. Includes optimized email lookup for exact email matches. Zero results may reflect email visibility restrictions or workspace policies, not global absence. Repeated calls may trigger HTTP 429; honor the Retry-After header.

• get_audit_action_types read

  Get Audit Action Types

  Tool to retrieve information about action types available in the Slack Audit Logs API. Use when you need to know which action types can be used to filter audit logs or understand the categories of auditable actions in Slack.

• get_audit_schemas read

  Get Audit Schemas

  Tool to retrieve object schema information from the Slack Audit Logs API. Use when you need to understand the types of objects returned by audit log endpoints. Returns a list of all object types with descriptions.

• get_bot_user read

  Fetch bot user information

  Fetches information for a specified, existing Slack bot user; will not work for regular user accounts or other integration types.

• get_call_info read

  Retrieve call information

  Retrieves a point-in-time snapshot of a specific Slack call's information.

• get_channel_conversation_preferences read

  Get channel conversation preferences

  Retrieves conversation preferences (e.g., who can post, who can thread) for a specified channel, primarily for use within Slack Enterprise Grid environments.

• get_reminder read

  Get reminder information

  Retrieves detailed information for an existing Slack reminder specified by its ID; this is a read-only operation.

• get_remote_file read

  Get remote file

  Retrieve information about a remote file added to Slack via the files.remote API. Does not work for standard Slack-hosted file uploads.

• get_slack_list_item read

  Get Slack List item

  Fetches a single item (row) from a Slack List via `slackLists.items.info`. Returns the row's `column_id`-keyed typed values along with metadata about the parent List. Set `include_is_subscribed` to also report whether the calling user is subscribed to the row. Requires a user token with the `lists:read` scope.

• get_team_profile read

  Retrieve team profile details

  Retrieves all profile field definitions for a Slack team, optionally filtered by visibility, to understand the team's profile structure.

• get_unread_messages_from_user read

  Get unread messages from user

  Retrieves unread direct messages from a specific user by opening their DM conversation, checking for unread messages, and fetching message history since the last read timestamp. Use this action when you need to check if a specific user has sent unread direct messages to the authenticated user, or when monitoring incoming DMs from particular users. Returns an empty messages array if there are no unread messages from the specified user. Note: This action only works for direct messages (DMs), not channel messages or group conversations.

• get_user_dnd_status read

  Get team DND status

  Retrieves a user's current Do Not Disturb status.

• get_user_presence read

  Retrieve user presence

  Retrieves a Slack user's current real-time presence (e.g., 'active', 'away') to determine their availability, noting this action does not provide historical data or status reasons.

• get_workspace_connections_for_channel read

  Get workspace connections for channel

  Tool to get all workspaces a channel is connected to within an Enterprise org. Use when you need to determine which workspaces have access to a specific public or private channel in an Enterprise Grid organization.

• get_workspace_settings read

  Fetch workspace settings information

  Retrieves detailed settings for a specific Slack workspace, primarily for administrators in an Enterprise Grid organization to view or audit workspace configurations.

• invite_users_to_a_slack_channel write

  Invite users to a Slack channel

  Invites users to an existing Slack channel using their valid Slack User IDs. Response is always HTTP 200; inspect `ok`, `error`, and `errors` fields to confirm users were added.

• invite_user_to_channel write

  Invite users to channel

  Invites users to a specified Slack channel; this action is restricted to Enterprise Grid workspaces and requires the authenticated user to be a member of the target channel.

• invite_user_to_workspace write

  Invite user to workspace

  Invites a user to a Slack workspace and specified channels by email; use `resend=True` to re-process an existing invitation for a user not yet signed up.

• join_an_existing_conversation write

  Join conversation by channel id

  Joins an existing Slack conversation (public channel, private channel, or multi-person direct message) by its ID, if the authenticated user has permission. Joining an already-joined channel returns a non-fatal no-op response. Private or restricted channel joins may fail with a permission error.

• leave_conversation write

  Leave conversation channel

  Leaves a Slack conversation given its channel ID; fails if leaving as the last member of a private channel or if used on a Slack Connect channel.

• list_admin_apps_approved read

  List approved apps

  Tool to list approved apps for an Enterprise Grid organization or workspace. Use when you need to retrieve the list of apps that have been approved for installation by workspace admins. Requires admin.apps:read scope and a user token from an org owner/admin context.

• list_admin_apps_requests read

  List app requests

  Tool to list pending app installation requests for a team/workspace. Use when you need to see which apps users have requested to install that haven't yet been approved or denied. Requires Enterprise Grid or Business+ plan with admin.apps:read scope.

• list_admin_emoji read

  List admin emoji

  List custom emoji across an Enterprise Grid organization. Use when you need to retrieve all custom emoji for an entire Enterprise Grid org (not just a single workspace). Requires admin.teams:read scope and an admin token. For single workspace emoji, use the regular emoji.list method instead.

• list_all_channels read

  List all channels

  Lists conversations available to the user with various filters and search options. Always use resolved `channel_id` (not display names) for downstream operations, as names may be non-unique. The `created` field in results is a Unix epoch timestamp (UTC). Pagination across large workspaces may return HTTP 429 with a `Retry-After` header; honor the delay and resume from the last successful cursor.

• list_all_users read

  List all users

  Retrieves a paginated list of all users with profile details, status, and team memberships in a Slack workspace; data may not be real-time. Filter response fields `is_bot`, `is_app_user`, and `deleted` to build human-only rosters. Profile fields like `email` and `phone` may be absent depending on OAuth scopes and workspace privacy settings. Guest/restricted accounts may be omitted based on scopes—do not treat results as a complete directory. High-frequency calls risk HTTP 429; honor the `Retry-After` header and throttle to ~1–2 requests/second. Use stable user IDs rather than display names for mapping. Prefer SLACK_FIND_USERS for targeted lookups; cache results to avoid full-workspace fetches.

• list_approved_workspace_invite_requests read

  List approved workspace invite requests

  List all approved workspace invite requests with pagination support. Use to review which invite requests have been approved and the details of each approval. Requires admin.invites:read scope and Enterprise Grid organization.

• list_auth_teams read

  List authorized teams

  Obtains a paginated list of workspaces your org-wide app has been approved for. Use when you need to discover all workspaces within an organization where the app is installed.

• list_available_workspaces read

  List available workspaces

  List Slack workspaces where both the connection and target user have access. Returns each workspace's team_id and name. Use this when: (1) the user references a workspace by name, (2) a user-specific tool requires team_id and you don't have one, or (3) a user-specific call fails with a team/workspace access error. Match the user's workspace name to a team_id from the results and pass that team_id to subsequent tools. If the name matches zero or multiple workspaces, ask the user to clarify. Only meaningful for org-level installs; single-workspace connections return the workspace only if the specified user's membership is visible to this token.

• list_conversations read

  List conversations

  List conversations (channels/DMs) accessible to a specified user (or the authenticated user if no user ID is provided), respecting shared membership for non-public channels. Returns conversation IDs (C* for channels, G* for group DMs), not display names. Absence of private channels, DMs, or MPIMs from results indicates token scope or membership limits, not that the conversation is nonexistent.

• list_custom_emojis read

  List team custom emojis

  Retrieves all custom emojis for the Slack workspace (image URLs or aliases), not standard Unicode emojis; does not include usage statistics or creation dates.

• list_denied_workspace_invite_requests read

  List denied workspace invite requests

  Tool to list all denied workspace invite requests with details about who denied them and when. Use when you need to review or audit denied invitation requests.

• list_enterprise_teams read

  List Enterprise teams

  List all teams (workspaces) in a Slack Enterprise Grid organization with pagination support. Use when you need to retrieve team IDs, names, domains, and metadata for all workspaces in an Enterprise. Requires admin.teams:read scope and Enterprise Grid organization.

• list_files_with_filters_in_slack read

  List Slack files

  Lists files and their metadata within a Slack workspace, filterable by user, channel, timestamp, or type; returns metadata only, not file content. Results are limited to files visible to the authenticated user — files in private channels or restricted to certain members require appropriate membership and permissions. For large workspaces, check `paging.pages` in the response to determine total pages when paginating.

• list_idp_groups_linked_to_channel read

  List IDP groups linked to channel

  Lists IDP groups that have restricted access to a private Slack channel. Use when you need to see which identity provider groups can access a specific channel.

• list_pending_workspace_invite_requests read

  List pending workspace invite requests

  Tool to list all pending workspace invite requests. Use when you need to see who has been invited but hasn't joined yet. Requires admin.invites:read scope.

• list_pinned_items read

  List pinned items in a channel

  Retrieves all messages and files pinned to a specified channel; the caller must have access to this channel.

• list_reminders read

  List reminders

  Lists all reminders with their details for the authenticated Slack user; returns an empty array if no reminders exist (valid state, not an error). Reminder text is not unique—perform client-side matching on returned objects before extracting a reminder ID for use with SLACK_DELETE_A_SLACK_REMINDER.

• list_remote_files read

  List remote files

  Retrieve information about a team's remote files.

• list_restricted_apps read

  List Restricted Apps

  Tool to list restricted apps for an org or workspace. Use when you need to view apps that have been restricted from installation. Requires admin.apps:read scope and appropriate admin permissions.

• list_scheduled_messages read

  List scheduled messages

  Retrieves a list of pending (not yet delivered) messages scheduled in a specific Slack channel, or across all accessible channels if no channel ID is provided, optionally filtered by time and paginated.

• list_slack_list_items read

  List Slack List items

  Lists the rows (items) in a Slack List via `slackLists.items.list`. Each row exposes `column_id`-keyed typed values (e.g. `rich_text`, `select`, `user`, `date`, `number`); the legacy `key`/`value` fields are deprecated. Results are cursor-paginated—you must paginate using `response_metadata.next_cursor` until it is empty, or rows are silently truncated to the first page. Set `archived=true` to return archived rows instead of active ones. Requires a user token with the `lists:read` scope.

• list_starred_items read

  List starred items

  Lists items starred by a user. Returns classic starred items only — does not reflect Slack's 'saved for later' feature. Use SLACK_SEARCH_MESSAGES or SLACK_SEARCH_ALL for broader saved-content queries.

• list_unread_channel_messages read

  List unread channel messages

  Lists all unread messages in a specified Slack channel for the authenticated user. This action fetches messages that have been posted since the user's last read position in the channel. Use this action when you need to retrieve messages the user hasn't seen yet. The action determines the user's read position and returns all messages posted after that timestamp. Note: This only returns messages from the main channel timeline, not threaded replies. For threaded replies, use SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION.

• list_user_group_members read

  List all users in a user group

  Retrieves a list of all user IDs within a specified Slack user group, with an option to include users from disabled groups.

• list_user_groups read

  List user groups

  Lists user groups in a Slack workspace, including user-created and default groups; results for large workspaces may be paginated.

• list_user_reactions read

  List user reactions

  Lists all reactions added by a specific user to messages, files, or file comments in Slack, useful for engagement analysis when the item content itself is not required. Results are paginated; check `response_metadata.next_cursor` and iterate with the `cursor` parameter to retrieve complete reaction history.

• list_workspace_admins read

  List workspace admins

  Tool to list all admins on a given Slack workspace. Use when you need to identify workspace administrators. Requires Enterprise Grid organization and admin.teams:read scope.

• list_workspace_owners read

  List workspace owners

  Tool to list all owners on a given Slack workspace. Use when you need to identify workspace ownership or admin structure. Requires admin.teams:read scope.

• list_workspace_users read

  List admin users

  Retrieves a paginated list of admin users for a specified Slack workspace.

• lookup_canvas_sections read

  Lookup Canvas Sections

  Looks up section IDs in a Slack Canvas for use with targeted edit operations. Section IDs are needed for insert_after, insert_before, delete, and section-specific replace operations.

• open_dm write

  Open DM

  Opens or resumes a Slack direct message (DM) or multi-person direct message (MPIM) by providing either user IDs or an existing channel ID. Returns `already_open=true` when the DM exists — treat as success and reuse the returned `channel.id` (starts with 'D') for subsequent SLACK_SEND_MESSAGE calls; passing a username, email, or user ID directly to SLACK_SEND_MESSAGE causes `channel_not_found`. Avoid redundant calls when an existing DM channel ID is available.

• pin_item write

  Pin an item to a channel

  Pins a message to a specified Slack channel; the message must not already be pinned.

• read_audit_logs read

  Read Audit Logs

  Read Slack Enterprise Grid Audit Logs (logins, admin changes, app installs, channel/privacy changes, etc.) with server-side filters and pagination. Requires Enterprise Grid organization with auditlogs:read scope and a user token (xoxp-...) from an owner/admin context.

• remove_call_participants write

  Remove call participants

  Registers participants removed from a Slack call.

• remove_emoji write

  Remove emoji

  Tool to remove a custom emoji across an Enterprise Grid organization. Use when you need to delete a custom emoji from the entire organization.

• remove_reaction_from_item write

  Remove reaction from item

  Removes an emoji reaction from a message, file, or file comment in Slack. Provide exactly one targeting method: channel+timestamp together, file, or file_comment. Mixing methods or omitting all returns invalid_arguments.

• remove_remote_file write

  Remove remote file

  Removes the Slack reference to an external file (which must have been previously added via the remote files API), specified by either its `external_id` or `file` ID (one of which is required), without deleting the actual external file.

• remove_star write

  Remove a star from an item

  Removes a star from a previously starred Slack item (message, file, file comment, channel, group, or DM), requiring identification via `file`, `file_comment`, `channel` (for channel/group/DM), or both `channel` and `timestamp` (for a message).

• remove_user_from_conversation write

  Remove user from conversation

  Removes a specified user from a Slack conversation (channel); the caller must have permissions to remove users and cannot remove themselves using this action.

• remove_user_from_workspace write

  Remove user from workspace

  Tool to remove a user from a Slack workspace. Use when you need to revoke a user's access to a workspace.

• rename_conversation write

  Rename a conversation

  Renames a Slack channel, automatically adjusting the new name to meet naming conventions (e.g., converting to lowercase), which may affect integrations using the old name.

• rename_emoji write

  Rename an emoji

  Renames an existing custom emoji in a Slack workspace, updating all its instances.

• reset_user_sessions write

  Reset user sessions

  Tool to wipe all valid sessions on all devices for a given user. Use when you need to force a user to re-authenticate due to security concerns or account changes.

• restrict_app_installation write

  Restrict app installation

  Restrict an app for installation on a workspace. Use when you need to prevent an app from being installed on a specific workspace or enterprise organization.

• retrieve_a_user_s_identity_details read

  Retrieve a user's identity details

  Retrieves the authenticated user's and their team's identity, with details varying based on OAuth scopes (e.g., `identity.basic`, `identity.email`, `identity.avatar`).

• retrieve_conversation_information read

  Retrieve conversation information

  Retrieves metadata for a Slack conversation by ID (e.g., name, purpose, creation date, with options for member count/locale), excluding message content. The `channel` parameter is effectively required. Private channels, DMs, or channels where the app lacks membership may return restricted data; check `is_archived` and `is_member` fields in the response to diagnose access issues. Bulk lookups may trigger HTTP 429 rate limiting; honor the `Retry-After` response header.

• retrieve_conversation_members_list read

  Get conversation members

  Retrieves a paginated list of active member IDs (not names, emails, or presence) for a specified Slack public channel, private channel, DM, or MPIM. Returns only user IDs; use a user-lookup tool to enrich member data.

• retrieve_current_user_dnd_status read

  Retrieve user DND status

  Retrieves a Slack user's current Do Not Disturb (DND) status to determine their availability before interaction; any specified user ID must be a valid Slack user ID.

• retrieve_detailed_information_about_a_file read

  Retrieve detailed file information

  Retrieves detailed metadata and paginated comments for a specific Slack file ID; does not download file content.

• retrieve_detailed_user_information read

  Retrieve detailed user information

  Retrieves comprehensive information for a valid Slack user ID, excluding message history and channel memberships. Sensitive fields like `email` and `phone` require the `users:read.email` scope and may be silently omitted based on workspace privacy policies.

• retrieve_message_permalink_url read

  Retrieve message permalink

  Retrieves a permalink URL for a specific message in a Slack channel or conversation; the permalink respects Slack's privacy settings.

• retrieve_user_profile_information read

  Retrieve user profile information

  Retrieves profile information for a specified Slack user (defaults to the authenticated user if `user` ID is omitted); a provided `user` ID must be valid. Sensitive fields like email and phone may be silently omitted if required scopes (e.g., `users:read.email`) are not granted or workspace privacy policies restrict access.

• revoke_file_public_sharing write

  Revoke a file's public url

  Revokes a Slack file's public URL, making it private; this is a no-op if not already public and is irreversible.

• rtm_connect write

  Start RTM session

  Starts a Real Time Messaging session and returns a WebSocket URL. Use when you need to establish a persistent RTM connection to receive real-time events from Slack.

• schedule_message write

  Schedule message

  Schedules a message to a Slack channel, DM, or private group for a future time (`post_at`), requiring `text`, `blocks`, or `attachments` for content; scheduling is limited to 120 days in advance.

• scim_get_config read

  Get SCIM service provider configuration

  Tool to retrieve SCIM service provider configuration from Slack. Use when you need to discover Slack's SCIM API capabilities including supported authentication schemes, bulk operations, filtering, and other service provider features.

• search_all read

  Search all content

  Tool to search all messages and files. Use when you need unified content search across channels and files in one call. Results are scoped to content visible to the authenticated token; missing hits in private or restricted channels reflect permission/membership gaps. Response separates messages and files into distinct sections — explicitly read the files section for document results. Results are index-based and may lag several minutes behind real-time; use SLACK_FETCH_CONVERSATION_HISTORY for near-real-time per-channel coverage. Paginated searches exceeding ~1 req/sec may return HTTP 429 too_many_requests; honor the Retry-After header and resume from the last page.

• search_messages read

  Search messages

  Workspace‑wide Slack message search with date ranges and filters. Use `query` modifiers (e.g., in:#channel, from:@user, before/after:YYYY-MM-DD), sorting (score/timestamp), and pagination.

• send_ephemeral_message write

  Send ephemeral message

  Sends an ephemeral message visible only to the specified `user` in a channel; other channel members cannot see it. Both the bot and the target user must be members of the specified channel.

• send_me_message write

  Share a me message in a channel

  Sends a 'me message' (e.g., '/me is typing') to a Slack channel, where it's displayed as a third-person user action; messages are plain text and the channel must exist and be accessible.

• send_message write

  Send message

  Posts a message to a Slack channel, DM, or private group. Provide exactly one visible content mode: `markdown_text` for normal Markdown content, or `blocks` for raw Slack Block Kit layouts. Use `fallback_text` only with `blocks`; it maps to Slack's top-level `text` fallback. Fails with `not_in_channel`, `channel_not_found`, or `channel_is_archived` if the bot lacks access. Rate-limited at ~1 req/sec (HTTP 429, honor `Retry-After`). Not idempotent — duplicate calls post duplicate messages.

• set_admin_user write

  Set admin user

  Promotes an existing workspace member (guest, regular user, or owner) to admin status. Use when you need to grant admin privileges to a user.

• set_conversation_prefs write

  Set conversation preferences

  Sets the posting permissions for a public or private channel in Slack. Use this to control who can post messages, start threads, use @channel/@here mentions, and initiate huddles in a specific channel.

• set_conversation_purpose write

  Set a conversation's purpose

  Sets the purpose (a short description of its topic/goal, displayed in the header) for a Slack conversation; the calling user must be a member.

• set_default_channels write

  Set default channels

  Tool to set the default channels of a workspace. Use when you need to configure which channels new members automatically join.

• set_dnd_duration write

  Set DND duration

  Turns on Do Not Disturb mode for the current user, or changes its duration.

• set_profile_photo write

  Set profile photo

  This method allows the user to set their profile image.

• set_read_cursor_in_a_conversation write

  Set conversation read cursor

  Marks a message, specified by its timestamp (`ts`), as the most recently read for the authenticated user in the given `channel`, provided the user is a member of the channel and the message exists within it.

• set_slack_list_access write

  Set Slack List access

  Grants or sets sharing access on a Slack List via `slackLists.access.set`. Grant `read`, `write`, or `owner` access to either channels (`channel_ids`) or users (`user_ids`) — exactly one of the two is required. The `owner` level is user-only and subject to additional server-side rules. Requires a user token with the `lists:write` scope.

• set_the_topic_of_a_conversation write

  Set conversation topic

  Sets or updates the topic for a specified Slack conversation.

• set_user_presence write

  Set user presence

  Manually sets a user's Slack presence, overriding automatic detection; this setting persists across connections but can be overridden by user actions or Slack's auto-away (e.g., after 10 mins of inactivity).

• set_user_profile write

  Set Slack user profile information

  Updates a Slack user's profile, setting either individual fields or multiple fields via a JSON object.

• set_workspace_description write

  Set workspace description

  Set the description of a given workspace. Use when you need to update or change the description text displayed for a Slack workspace.

• set_workspace_icon write

  Set workspace icon

  Sets the icon of a workspace. Use when you need to update or change the workspace icon image. The image must be publicly accessible and in a supported format (GIF, PNG, JPG, JPEG, HEIC, or HEIF).

• set_workspace_name write

  Set workspace name

  Set the name of a given Slack workspace. Use when you need to update the display name for a workspace in an Enterprise Grid organization.

• set_workspace_owner write

  Set workspace owner

  Set an existing guest, regular user, or admin user to be a workspace owner. Use when you need to promote a workspace member to owner status. Requires an Enterprise Grid workspace.

• set_workspaces_for_channel write

  Set workspaces for channel

  Set the workspaces in an Enterprise grid org that connect to a channel. Use when you need to share a public or private channel with specific workspaces in an Enterprise Grid organization.

• share_remote_file write

  Share a remote file in channels

  Shares a remote file, which must already be registered with Slack, into specified Slack channels or direct message conversations.

• start_call write

  Start call

  Registers a new call in Slack using `calls.add` for third-party call integration; `created_by` is required if not using a user-specific token.

• test_auth read

  Test authentication

  Checks authentication and tells you who you are. Use to verify Slack API authentication is functional and to retrieve identity information about the authenticated user or bot.

• unarchive_channel write

  Unarchive channel

  Reverses conversation archival.

• unpin_item write

  Unpin message from channel

  Unpins a message, identified by its timestamp, from a specified channel if the message is currently pinned there; this operation is destructive.

• update_call_info write

  Update call information

  Updates the title, join URL, or desktop app join URL for an existing Slack call identified by its ID.

• update_remote_file write

  Update an existing remote file

  Updates metadata or content details for an existing remote file in Slack; this action cannot upload new files or change the fundamental file type.

• updates_a_slack_message write

  Update a Slack message

  Updates a Slack message by timestamp. Provide exactly one visible content mode: `markdown_text` for normal Markdown content, or `blocks` for raw Slack Block Kit layouts. Use `fallback_text` only with `blocks`; it maps to Slack's top-level `text` fallback.

• update_slack_list write

  Update Slack List

  Updates a Slack List's metadata via `slackLists.update`. Only the List's `name`, `description_blocks`, and `todo_mode` are editable here. The List to update is identified by its `id` (not `list_id`). Descriptions are rich text — a plain string is wrapped into a `rich_text` block automatically. Requires a user token with the `lists:write` scope.

• update_slack_list_item write

  Update Slack List item

  Updates one or more cells in an EXISTING Slack List row via `slackLists.items.update`. Each cell is identified by `row_id` (an existing row ID matching `^Rec[A-Z0-9]{8,}$`) and `column_id` and carries a typed value; text columns require Block Kit `rich_text` (a plain string is wrapped automatically), and `select` takes the column's choice values (e.g. `["todo"]`). Use it to UPDATE existing rows; the live API rejects `row_id_to_create` inside a cell (despite Slack's inline example), so to ADD a row use `create_slack_list_item`. Requires a user token with the `lists:write` scope.

• update_user_group write

  Update Slack user group

  Updates an existing Slack User Group, which must be specified by an existing `usergroup` ID, with new optional details such as its name, description, handle, or default channels.

• update_user_group_members write

  Update user group members

  Replaces all members of an existing Slack User Group with a new list of valid user IDs.

• upload_or_create_a_file_in_slack write

  Upload or create a file in Slack

  Upload files, images, screenshots, documents, or any media to Slack channels or threads. Supports all file types including images (PNG, JPG, JPEG, GIF), documents (PDF, DOCX, TXT), code files, and more. Can share files publicly in channels or as thread replies with optional comments. Large files may fail with `upload_too_large`; use SLACK_ADD_A_REMOTE_FILE_FROM_A_SERVICE for large uploads. If the API returns `ok=false` with `method_deprecated`, fall back to SLACK_ADD_A_REMOTE_FILE_FROM_A_SERVICE or SLACK_SEND_MESSAGE with a URL.

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