Slack MCP server

by mrfentmen·io.github.mrfentmen/slack-mcp·v1.1.0

Query the Slack Web API (bot token; set SLACK_BOT_TOKEN, xoxb): channels, history, post messages.

C65/100grade C

What users say

No reviews yet

Safety scan

C65/100

Adoption

New

805 downloads/wk

Reviews

Nobody has reviewed Slack yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

channel_info
Channel details.
emoji_list
Workspace emoji.
get_history
Recent messages in one channel, newest last.
list_channels
Public channels in the workspace, with id and name.
list_users
Workspace members.
pin_message
Pin a REAL message.
post_messagewrite action
Post a message to a channel as the bot, visible to everyone.
set_topic
Set a REAL channel topic.
thread_replies
Replies in a thread.
user_info
Member profile.

scanner v0.1.10 · 2026-10-28 · same rubric, same numbers if you re-run it

no findings

Code scan7 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitylocal package, no credentials required12/15
Maintenancerepository not readable: repo not found3/15
Maintainer identityno repository or website to verify2/10

Overall 65/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded Productivity MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 65/100; higher than 15% of 1,297 Productivity servers
Tools: 10; the typical Productivity server has 7
Tools that change things: 10%; typical: 0%. Fewer write tools means less an agent can break
Downloads a week: 805; more than 90% of 423 Productivity servers with a package

What its tools let an agent do: 8 read · 1 change · 1 send or post

Runs npx -y @mrfentmen/slack-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add slack-mcp -- npx -y @mrfentmen/slack-mcp

Is Slack MCP server safe?: With care: it is graded C, so read the findings first (65/100). Read the Slack safety report
How do I install Slack?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Slack need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Slack maintained?: The latest release is v1.1.0.
What can I use instead of Slack?: Servers from other publishers that do the same job: Argent MCP server, Agent-Native Dispatch MCP server and Sceneview MCP server.
How does Slack compare with other Productivity MCP servers?: safety score 65/100 (higher than 15% of 1,297 Productivity servers); tools 10 (the typical Productivity server has 7); tools that change things 10% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Same job from other publishers: the closest match first, then the best rated.

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