This is your standard Slack integration for Claude, built around the Web API with 14 tools covering messages, channels, users, files, and reactions. It requires a SLACK_BOT_TOKEN and appropriate OAuth scopes. The main win here is context efficiency: about 500 tokens for metadata versus 15,000 if you loaded an MCP server with all 30+ Slack tools upfront. Messaging and file uploads require confirmation, which is sensible. Use this for incident notifications, posting deployment updates, or building workflows that need to ping channels. The documentation includes curl examples for every endpoint, so you can test your token setup independently before letting Claude loose on your workspace.
npx skills add https://github.com/oimiragieo/agent-studio --skill slack-notifications