Use when a developer asks which Slack Web API method does something, needs a method's OAuth scopes or token type, wants to call or test a family.method endpoint (chat.postMessage, conversations.history, users.info, views.open), is handling cursor pagination (next_cursor) or rate limits (tier/ratelimited/Retry-After), or is debugging errors like missing_scope, invalid_auth, or channel_not_found.
Install
npx skills add slackapi/slack-skills-plugin --skill slack-apinpx skills add slackapi/slack-skills-plugin --skill slack-api -a claude-code -gnpx skills add slackapi/slack-skills-plugin --skill slack-api -a codex -ggemini skills install https://github.com/slackapi/slack-skills-plugin.git --path skills/slack-apigh skill install slackapi/slack-skills-plugin slack-apigit clone --depth 1 https://github.com/slackapi/slack-skills-plugin /tmp/slackapi__slack-skills-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/slackapi__slack-skills-plugin/skills/slack-api ~/.claude/skills/slack-api # Claude Code
cp -R /tmp/slackapi__slack-skills-plugin/skills/slack-api ~/.agents/skills/slack-api # Codex, Cursor, Gemini CLI, Copilot, OpenCode