MCP · Communication
Slack
The official Slack MCP lets you read channels, search history, summarize threads, and post messages. Handy for skipping three hours of scrollback before a 1:1.
Official docs ↗Free (with your Slack plan)
Use cases
- ›Summarize a channel before a meeting
- ›Find a decision made 3 months ago
- ›Post an async status from your terminal
Installation
1.Create a Slack app (api.slack.com/apps), add scopes channels:history, channels:read, chat:write, users:read. Install the app on your workspace, copy the Bot token (xoxb-...) and invite the bot to the relevant channels.
2.One line, one terminal
$ claude mcp add slack -- npx -y @slack/mcp-server --token=YOUR_BOT_TOKENNeed to install Claude Code first? See the Claude Code page · Official docs
Concrete examples
›
"Résume #product sur les 7 derniers jours. Sépare décisions, questions ouvertes, et FYI."Claude reads the full #product history, categorizes messages into 3 buckets, and lists decisions with who made them and when.
Sample output
→ Reading #product (7d, 184 messages, 23 threads) Decisions made - Mon Nov 10: v2 launch postponed to Dec 2 (Marie) - Tue Nov 11: switching to a single CTA on the landing (Pierre, approved) - Thu Nov 13: killing "referral v2" (Thomas, actioned after postmortem) Open questions - Pricing: Free tier 3 or 5 projects? (unresolved thread, 12 replies) - DB migration: go/no-go before Nov 20 (Julien waiting on CTO approval) FYI - New design system shared by Emma (Figma file in thread) - API incident yesterday 2pm-2:23pm, postmortem coming
›
"Trouve le message où on a décidé de la structure de prix pour les entreprises, il y a environ 3 mois."Full-text search filtered by date. Claude isolates the decisional message and pulls the thread context.
Sample output
→ Searching Slack (keywords: pricing enterprise, window: 2-4 months ago) Match found in #pricing on 2025-08-14 (3 months 2 days ago) Original message (Sarah, CEO): "Ok, decision: enterprise = $499/month minimum + custom if >100 users. No intermediate tier between Pro and Enterprise. Good? 👍/👎" Reactions: 5 👍, 1 👎 (Marie, who wanted a $199 tier) Thread: 8 following messages, none questioned the decision. The decision is final. No enterprise pricing discussions since, in the channels read by the bot.