Product / UX / Agent tools & protocols

Slack MCP Server

Actively maintained community Slack MCP server (Go) connecting AI agents to Slack workspaces over stdio/SSE/HTTP, with a 'stealth mode' needing no bot install or workspace permissions plus an OAuth mode. Exposes 18 tools (history, search, posting, reactions, channel/user management).

There is no first-party Slack MCP server; the original reference server was archived, and this is the maintained community one. The PyPI package of the same name is an unedited template and is not this product, so adoption reads the npm package. Verified 2026-08-13 via GitHub and the repository LICENSE.

Openness

5 high confidence

5.0

license: MIT(OSI)
source: public
core-gated: ungated

Fully MIT, no feature-gated core. The LICENSE is the plain MIT License, the whole Go server ships in the tree and installs from npm or Docker with no key, and the maintainer sells nothing beside it - no hosted tier, enterprise directory or second license.

https://raw.githubusercontent.com/korotovsky/slack-mcp-server/master/LICENSE recorded 2026-08-13
Plain MIT License text: "Copyright (c) 2025 Dmitrii Korotovskii".
https://github.com/korotovsky/slack-mcp-server recorded 2026-08-13
Repo page - MIT badge, 1,782 stargazers, the whole server in the tree. No paid tier, hosted service, license key or enterprise directory.

Adoption

3 medium confidence

3.0

111,307 downloads of slack-mcp-server in the trailing 30 days, which bands at 100K-1M, level 3 on the software adoption scale. The figure is for the npm package, whose registry metadata points at korotovsky/slack-mcp-server; the PyPI package of the same name is an unedited template and is a different thing entirely.

https://api.npmjs.org/downloads/point/last-month/slack-mcp-server recorded 2026-08-12
111,307 downloads in the trailing 30 days for slack-mcp-server

Capability

4 medium confidence

4.0

Broad Slack read/write surface with an unusual no-permission stealth mode.

https://github.com/korotovsky/slack-mcp-server recorded 2026-08-13
README - "supports Stdio, SSE and HTTP transports, proxy settings, DMs, Group DMs, Smart History fetch (by date or count), may work via OAuth or in complete stealth mode with no permissions and scopes in Workspace". Feature list opens with "Stealth and OAuth Modes" and "Enterprise Workspaces Support"; a Tools section enumerates the tool set.

Verified 2026-08-12