slack-mcp-server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| AUTH_TOKEN | No | Optional: Bearer token for HTTP authorization (Streamable HTTP transport only) | |
| SLACK_TEAM_ID | Yes | Slack Team ID (starts with T) | |
| SLACK_BOT_TOKEN | Yes | Slack Bot User OAuth Token (starts with xoxb-) | |
| SLACK_CHANNEL_IDS | No | Optional: Comma-separated list of predefined channel IDs |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| slack_list_channelsB | List public and private channels that the bot is a member of, or pre-defined channels in the workspace with pagination |
| slack_post_messageA | Post a new message to a Slack channel or direct message to user. Accepts both channel names (#general, general) and channel IDs (C1234567890). |
| slack_reply_to_threadC | Reply to a specific message thread in Slack. Accepts both channel names (#general, general) and channel IDs (C1234567890). |
| slack_add_reactionA | Add a reaction emoji to a message. Accepts both channel names (#general, general) and channel IDs (C1234567890). |
| slack_get_channel_historyA | Get recent messages from a channel. Accepts both channel names (#general, general) and channel IDs (C1234567890). |
| slack_get_thread_repliesA | Get all replies in a message thread. Accepts both channel names (#general, general) and channel IDs (C1234567890). |
| slack_get_usersA | Get a list of all users in the workspace with their basic profile information |
| slack_get_user_profileB | Get detailed profile information for a specific user |
| slack_post_markdown_messageA | Post a new message to a Slack channel or direct message with markdown formatting enabled. Accepts both channel names (#general, general) and channel IDs (C1234567890). Supports Slack's mrkdwn formatting like bold, italic, |
| slack_reply_to_thread_markdownA | Reply to a specific message thread in Slack with markdown formatting enabled. Accepts both channel names (#general, general) and channel IDs (C1234567890). Supports Slack's mrkdwn formatting like bold, italic, |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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