--- title: "Slack MCP: review, setup & limitations · Undominated.ai" canonical: https://undominated.ai/mcp-servers/slack/ description: "Searches workspace conversations and performs Slack actions under the authenticated user’s scopes and workspace policy." --- # Slack MCP: review, setup & limitations · Undominated.ai > Searches workspace conversations and performs Slack actions under the authenticated user’s scopes and workspace policy. [← Explore all mcp servers](/mcp-servers/) WORKSPACE MESSAGING / Slack # Slack MCP Searches workspace conversations and performs Slack actions under the authenticated user’s scopes and workspace policy. See setup guidance ↓Original source ↗ SOURCE REVIEW Reviewed 2026-09-21 Evidence 5 linked sources Publisher Slack Licence Not established Read what was—and wasn’t—checked ↓ “With the Slack MCP server, your integrated apps can search channels, send messages, and perform other Slack actions through MCP clients.” Slack · upstream description ↗ Our analysis follows below. 01 / THE REASONING ## Why this made the selection. - Adds conversation history and team decisions that issue trackers and knowledge pages may not contain. - Slack documents per-tool OAuth scopes, workspace approval and the limits on eligible client applications. ### A good fit for - Finding a prior team discussion and its surrounding thread. - Preparing an agreed follow-up using workspace context. ### Weigh up before choosing - Scopes may allow private conversation reads and real message, file, canvas or list changes. - Only internal or Marketplace-published apps may use the server; dynamic client registration and SSE are unsupported. - The hosted implementation’s language and source licence were not established. 02 / THE REVIEW RECORD ## What we actually inspected. Source review has boundaries. A clear record is more useful than a “safe” badge. ### Material inspected - Slack MCP overview: tools, scopes, endpoint and app restrictions. - Claude and Cursor connection guides: approved client setup and OAuth. - Sample-app development guide: app registration, scope selection and consent. ### Our findings - Private-channel and messaging authority comes from specific OAuth scopes, not merely from adding the endpoint. - The documented Claude command installs the Slack MCP and Skills plugin, which configures the server and starts OAuth. ### Not established by this review - Workspace installation, OAuth, searches, message sends and admin controls were not executed. The review applies to the material and revision named here. A newer upstream release can change its behavior. 03 / PUT IT TO WORK ## Connect a server deliberately. Upstream setup instructions ↗ DOCUMENTED COMMAND claude plugin install slack Copy command ↗ Copying does not execute this command. It may retrieve a newer version than the reviewed source. - In Claude Code, install the documented Slack MCP and Skills plugin, then complete workspace OAuth. - For Claude Desktop add Slack through Connectors; Cursor users should follow Slack’s separate guide. ### Before you start - The chosen supported client and access to a Slack workspace. - Workspace-admin approval for the integration. ### Compatibility The official guides cover Claude Code, Claude Desktop and Cursor with workspace approval. · Custom clients need a registered eligible Slack app and the documented OAuth flow. ### Transports Streamable HTTP ### Workspace-approved OAuth - Reads Slack content allowed by the granted user scopes. - Granted write scopes can send messages and change workspace content. ### Cost model Check the workspace and chosen client plans; Slack’s documented API rate limits also apply. 04 / FOLLOW THE EVIDENCE ## The source trail. Our notes are separate from the original resource. Check upstream before adopting a new version. - Server scope, transport and access restrictions ↗ Checked 2026-09-21 https://docs.slack.dev/ai/slack-mcp-server/ Supports: upstreamDescription, descriptionSourceUrl, summary, whySelected, bestFor, limitations, transports, review, access - Claude connection instructions ↗ Checked 2026-09-21 https://docs.slack.dev/ai/slack-mcp-server/connect-to-claude/ Supports: install, compatibility, review - Cursor connection instructions ↗ Checked 2026-09-21 https://docs.slack.dev/ai/slack-mcp-server/connect-to-cursor/ Supports: install, compatibility - Custom-app development and OAuth ↗ Checked 2026-09-21 https://docs.slack.dev/ai/slack-mcp-server/developing/ Supports: review, access, compatibility, install.prerequisites - Slack workspace plans ↗ Checked 2026-09-21 https://slack.com/pricing Supports: access.cost KEEP COMPARING ## Other approaches to consider. Related by category or shared topics. These are alternatives to inspect, not a measured quality order. [### Asana MCP V2 ↗ Asana’s current workspace-scoped MCP connection for task, project and portfolio workflows.](/mcp-servers/asana/)[### Canva MCP ↗ A hosted connection for authorized Canva design discovery, creation, editing and export workflows.](/mcp-servers/canva/)[### GitHub MCP Server ↗ Connects an assistant to repository, issue, pull-request and workflow operations with selectable toolsets and account permissions.](/mcp-servers/github/) [AI Tools ↗](/tools/)[Skills ↗](/skills/)[Agents ↗](/agents/)[MCP Servers ↗](/mcp-servers/)