Server Details
| Property | Value |
|---|---|
| Transport | Streamable HTTP |
| Hosting | Remote (externally hosted) |
| Categories | Productivity & Collaboration, Business Operations |
Authentication
This server supports the following authentication method:Header Authentication
This server authenticates via HTTP headers. During the server onboarding flow, you will be prompted to confirm the required headers. Note that you do not provide the values for the headers during the server on-boarding. Header values are provided by the users during the Auth Link flow.Getting Started
Add the server
Navigate to the Server Library and click on the New Server button. Find Slack in the Caylex Catalog.
Use in a project
Add the server to a project by configuring project connections. Its tools are now available to any agents connected to that project.
Available Tools
This server provides 13 tools:slack_user_search_messages
slack_user_search_messages
Search messages in the workspace. Use to find past messages by keyword or phrase. Optionally restrict to channel_ids. Returns matching messages with context; use sort/sort_dir and count for relevance and pagination.
slack_user_list_channels
slack_user_list_channels
List channels the authenticated user can access. Use to discover public channels, private channels the user is in, DMs, and group DMs. Returns channel IDs and names for posting or reading. Paginate with cursor and limit (max 200).
slack_user_reply_to_thread
slack_user_reply_to_thread
Reply to a thread in a channel as the user. Use when responding to a specific message. Provide channel_id, thread_ts (from the parent message), and reply text.
slack_get_thread_replies
slack_get_thread_replies
Get all messages in a thread. Use when you need replies under a message. Parse Slack URLs like https://workspace.slack.com/archives/C123456/p1234567890123456 as channel_id=‘C123456’, thread_ts=‘1234567890.123456’. Returns parent message and replies.
slack_bot_reply_to_thread
slack_bot_reply_to_thread
Reply to a thread as the bot. Use when the bot should reply in a thread. Provide channel_id, thread_ts, and reply text. Requires bot token in request.
slack_get_channel_history
slack_get_channel_history
Get recent messages from a Slack channel. Use after you have a channel_id (e.g. from slack_user_list_channels or a Slack URL). Returns messages with timestamps and thread_ts for replies.
slack_user_get_info
slack_user_get_info
Get profile and info for a Slack user by user_id. Use to resolve display names, emails, or check if a user exists before messaging or inviting.
slack_bot_post_message
slack_bot_post_message
Post a new message to a Slack channel as the bot. Use when the bot should send a message (not the user). Provide channel_id and text. Requires bot token in request.
slack_bot_add_reaction
slack_bot_add_reaction
Add an emoji reaction to a message as the bot. Use when the bot should react to a message. Provide channel_id, message timestamp, and reaction name (e.g. ‘thumbsup’). Requires bot token in request.
slack_user_add_reaction
slack_user_add_reaction
Add an emoji reaction to a message as the user. Use to react to a message (e.g. thumbsup, eyes). Provide channel_id, message timestamp, and reaction name (without colons, e.g. ‘thumbsup’).
slack_user_post_message
slack_user_post_message
Post a new message to a Slack channel as the authenticated user. Use when sending a message to a channel. Provide channel_id (e.g. C123456) and message text.
slack_invite_users_to_channel
slack_invite_users_to_channel
Invite one or more users (or bots) to a Slack channel. Provide channel_id and a list of user IDs. Use when adding people or bots to a channel. Requires invite permission.
slack_list_users
slack_list_users
List all users in the Slack workspace. Use to find user IDs for DMs, mentions, or invites. Supports pagination (cursor, limit) and optional team_id for Enterprise Grid.
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