How to integrate Slack MCP with Codex

Registers new participants added to a Slack call.

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

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

Adds an Enterprise user to a workspace.

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

Adds a reference to an external file (e.

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

Tool to search for public or private channels in an Enterprise organization.

Tool to check API calling code by testing connectivity and authentication to the Slack API.

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.

Search Slack messages, files, channels, and users via Real-time Search API.

Check if semantic (AI-powered) search is available on the Slack workspace.

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 a public Slack channel to private using the Admin API.

Creates a Slack reminder with specified text and time; time accepts Unix timestamps, seconds from now, or natural language (e.

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

Initiates a public or private channel-based conversation in a Slack workspace.

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).

Tool to create an Enterprise team in Slack.

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

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

Deletes a Slack Canvas permanently and irreversibly.

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

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.

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

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

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.

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

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.

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.

Tool to download Slack file content and convert it to a publicly accessible URL.

Edits a Slack Canvas with granular control over content placement.

Enables public sharing for an existing Slack file by generating a publicly accessible URL; this action does not create new files.

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.

Ends an ongoing Slack call, identified by its ID (obtained from `calls.

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.

Ends the current user's snooze mode immediately.

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.

Fetches reactions for a Slack message, file, or file comment.

Retrieves replies to a specific parent message in a Slack conversation, using the channel ID and the parent message's timestamp (`ts`).

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

Find channels in a Slack workspace by any criteria - name, topic, purpose, or description.

Retrieves the Slack user object for an active user by their registered email address; requires the users:read.

Find users in a Slack workspace by any criteria - email, name, display name, or other text.

Tool to retrieve information about action types available in the Slack Audit Logs API.

Tool to retrieve object schema information from the Slack Audit Logs API.

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

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

Retrieves conversation preferences (e.

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

Retrieve information about a remote file added to Slack via the files.

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

Retrieves a user's current Do Not Disturb status.

Retrieves a Slack user's current real-time presence (e.

Tool to get all workspaces a channel is connected to within an Enterprise org.

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

Invites users to an existing Slack channel using their valid Slack User IDs.

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.

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.

Joins an existing Slack conversation (public channel, private channel, or multi-person direct message) by its ID, if the authenticated user has permission.

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.

Tool to list approved apps for an Enterprise Grid organization or workspace.

Tool to list pending app installation requests for a team/workspace.

List custom emoji across an Enterprise Grid organization.

Lists conversations available to the user with various filters and search options.

Retrieves a paginated list of all users with profile details, status, and team memberships in a Slack workspace; data may not be real-time.

List all approved workspace invite requests with pagination support.

Obtains a paginated list of workspaces your org-wide app has been approved for.

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.

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

Tool to list all denied workspace invite requests with details about who denied them and when.

List all teams (workspaces) in a Slack Enterprise Grid organization with pagination support.

Lists files and their metadata within a Slack workspace, filterable by user, channel, timestamp, or type; returns metadata only, not file content.

Lists IDP groups that have restricted access to a private Slack channel.

Tool to list all pending workspace invite requests.

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

Lists all reminders with their details for the authenticated Slack user; returns an empty array if no reminders exist (valid state, not an error).

Retrieve information about a team's remote files.

Tool to list restricted apps for an org or workspace.

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.

Lists items starred by a user.

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

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

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.

Tool to list all admins on a given Slack workspace.

Tool to list all owners on a given Slack workspace.

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

Looks up section IDs in a Slack Canvas for use with targeted edit operations.

Opens or resumes a Slack direct message (DM) or multi-person direct message (MPIM) by providing either user IDs or an existing channel ID.

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

Read Slack Enterprise Grid Audit Logs (logins, admin changes, app installs, channel/privacy changes, etc.

Registers participants removed from a Slack call.

Tool to remove a custom emoji across an Enterprise Grid organization.

Removes an emoji reaction from a message, file, or file comment in Slack.

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.

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).

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

Tool to remove a user from a Slack workspace.

Renames a Slack channel, automatically adjusting the new name to meet naming conventions (e.

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

Tool to wipe all valid sessions on all devices for a given user.

Restrict an app for installation on a workspace.

Retrieves the authenticated user's and their team's identity, with details varying based on OAuth scopes (e.

Retrieves metadata for a Slack conversation by ID (e.

Retrieves a paginated list of active member IDs (not names, emails, or presence) for a specified Slack public channel, private channel, DM, or MPIM.

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.

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

Retrieves comprehensive information for a valid Slack user ID, excluding message history and channel memberships.

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

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.

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

Starts a Real Time Messaging session and returns a WebSocket URL.

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.

Tool to retrieve SCIM service provider configuration from Slack.

Tool to search all messages and files.

Workspace‑wide Slack message search with date ranges and filters.

Sends an ephemeral message visible only to the specified `user` in a channel; other channel members cannot see it.

Sends a 'me message' (e.

Posts a message to a Slack channel, DM, or private group; requires at least one content field (`markdown_text`, `text`, `blocks`, or `attachments`) — omitting all causes a `no_text` error.

Promotes an existing workspace member (guest, regular user, or owner) to admin status.

Sets the posting permissions for a public or private channel in Slack.

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.

Tool to set the default channels of a workspace.

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

This method allows the user to set their profile image.

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.

Sets or updates the topic for a specified Slack conversation.

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.

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

Set the description of a given workspace.

Sets the icon of a workspace.

Set the name of a given Slack workspace.

Set an existing guest, regular user, or admin user to be a workspace owner.

Set the workspaces in an Enterprise grid org that connect to a channel.

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

Registers a new call in Slack using `calls.

Checks authentication and tells you who you are.

Reverses conversation archival.

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

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

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, identified by `channel` ID and `ts` timestamp, by modifying its `text`, `attachments`, or `blocks`; provide at least one content field, noting `attachments`/`blocks` are replaced if included (`[]` clears them).

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.

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

Upload files, images, screenshots, documents, or any media to Slack channels or threads.