reaction

MCP tool from Slack User MCP by lars-hagen

(string): Emoji name without colons

How to use it

reaction is exposed by the Slack User MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the reaction 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

text

(string): The message text to post