user_id

MCP tool from Slack User MCP by lars-hagen

(string): The user's ID

How to use it

user_id is exposed by the Slack User MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the user_id tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install Slack User MCP

$npx -y @smithery/cli install @lars-hagen/slack-user-mcp --client claude

FULL SLACK USER MCP LISTING

Other tools in Slack User MCP (7)

channel_id

(string): The ID of the channel to post to

cursor

(string): Pagination cursor for next page

limit

(number, default: 100, max: 200): Maximum number of channels to return

reaction

(string): Emoji name without colons