Run the Slack MCP agent and tools in the cloud with Meshagent Rooms:

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Required Environment Variables

Set these environment variables to configure Slack access:

  • SLACK_TEAM_ID: Your Slack workspace Team ID (format: T01234567)
  • SLACK_CHANNEL_IDS: Comma-separated list of Slack Channel IDs (format: C01234567, C76543210)
  • SLACK_BOT_TOKEN: Your Slack bot token (format: xoxb-your-bot-token)

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Steps

  1. Install Meshagent CLI

    pip install "meshagent[all]"

  2. Sign up and authenticate

  3. Start the Slack MCP service in a Meshagent Room

    Replace the env variable values as needed:

    meshagent service test \
  --room=test \
  --role=agent \
  --image=meshagent/mcp-slack:latest \
  --env MESHAGENT_PORT=8001 \
  --env SLACK_TEAM_ID=T01234567 \
  --env SLACK_CHANNEL_IDS=C01234567,C76543210 \
  --env SLACK_BOT_TOKEN=xoxb-your-bot-token \
  --port="num=8001 path=/webhook liveness=/ type=meshagent.callable" \
  --name=mcp-slack-service

    This command will start a Meshagent Room with the Slack MCP server available. Rooms automatically close if they become inactive.

  4. Start a chatbot agent in the room using the Slack toolkit

    meshagent chatbot join \
  --room=test \
  --agent-name=sample \
  --name=sample \
  --toolkit=mcp-slack
    • This will start a chatbot in the same room that can use the Slack toolkit.
    • Multiple toolkits can be used concurrently in the same room with the same agent.
    • A room link will be provided by the command output, allowing you to interact with the agent and the available tools directly in your browser or CLI.

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Tools Available

Interact with Slack Workspaces over the Slack API. This server provides the following tools:

Tool NameDescription
slack_add_reactionAdd a reaction emoji to a message
slack_get_channel_historyGet recent messages from a channel
slack_get_thread_repliesGet all replies in a message thread
slack_get_user_profileGet detailed profile information for a specific user
slack_get_usersGet a list of all users in the workspace
slack_list_channelsList public or pre-defined channels with pagination
slack_post_messagePost a message to a Slack channel
slack_reply_to_threadReply to a specific message thread in Slack

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Tool Details

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slack_add_reaction

Add a reaction emoji to a message
Parameters:

  • channel_id (string) — The ID of the channel containing the message
  • reaction (string) — The name of the emoji reaction (without ::)
  • timestamp (string) — The timestamp of the message to react to

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slack_get_channel_history

Get recent messages from a channel
Parameters:

  • channel_id (string) — The ID of the channel
  • limit (number, optional) — Number of messages to retrieve (default 10)

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slack_get_thread_replies

Get all replies in a message thread
Parameters:

  • channel_id (string) — The ID of the channel containing the thread
  • thread_ts (string) — The timestamp of the parent message (e.g., ‘1234567890.123456’)

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slack_get_user_profile

Get detailed profile information for a specific user
Parameters:

  • user_id (string) — The ID of the user

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slack_get_users

Get a list of all users in the workspace
Parameters:

  • cursor (string, optional) — Pagination cursor for next results page
  • limit (number, optional) — Maximum number of users (default 100, max 200)

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slack_list_channels

List public or pre-defined channels with pagination
Parameters:

  • cursor (string, optional) — Pagination cursor for next results page
  • limit (number, optional) — Maximum number of channels (default 100, max 200)

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slack_post_message

Post a message to a Slack channel
Parameters:

  • channel_id (string) — The channel ID
  • text (string) — The message text

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slack_reply_to_thread

Reply to a specific message thread in Slack
Parameters:

  • channel_id (string) — The channel ID
  • text (string) — The reply text
  • thread_ts (string) — The timestamp of the parent message (‘1234567890.123456’)

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