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ubie-oss

Slack MCP Server

by ubie-oss

Server Configuration

Describes the environment variables required to run the server.

NameRequiredDescriptionDefault
SLACK_BOT_TOKENYesSlack Bot User OAuth Token
SLACK_USER_TOKENYesSlack User OAuth Token (required for some features like message search)
NPM_CONFIG_//npm.pkg.github.com/:_authTokenNoYour GitHub Personal Access Token needed to install the package

Tools

Functions exposed to the LLM to take actions

NameDescription
slack_list_channels

List public channels in the workspace with pagination

slack_post_message

Post a new message to a Slack channel

slack_reply_to_thread

Reply to a specific message thread in Slack

slack_add_reaction

Add a reaction emoji to a message

slack_get_channel_history

Get messages from a channel in chronological order. Use this when: 1) You need the latest conversation flow without specific filters, 2) You want ALL messages including bot/automation messages, 3) You need to browse messages sequentially with pagination. Do NOT use if you have specific search criteria (user, keywords, dates) - use slack_search_messages instead.

slack_get_thread_replies

Get all replies in a message thread

slack_get_users

Retrieve basic profile information of all users in the workspace

slack_get_user_profiles

Get multiple users profile information in bulk

slack_search_messages

Search for messages with specific criteria/filters. Use this when: 1) You need to find messages from a specific user, 2) You need messages from a specific date range, 3) You need to search by keywords, 4) You want to filter by channel. This tool is optimized for targeted searches. For general channel browsing without filters, use slack_get_channel_history instead.

slack_search_channels

Search for channels by partial name match. Use this when you need to find channels containing specific keywords in their names. Returns up to the specified limit of matching channels.

slack_search_users

Search for users by partial name match across username, display name, and real name. Use this when you need to find users containing specific keywords in their names. Returns up to the specified limit of matching users.

Prompts

Interactive templates invoked by user choice

NameDescription

No prompts

Resources

Contextual data attached and managed by the client

NameDescription

No resources

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