Slack MCP Server (Themetralla3000/slack-mcp-server) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 6 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100

Slack MCP Server

A Model Context Protocol (MCP) server for Slack workspace integration. This server allows AI assistants to interact directly with your Slack workspace, providing tools to manage channels, send messages, list users, and upload files.

→ Themetralla3000/slack-mcp-server· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

Themetralla3000

Source: Glama

Is this your MCP?

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: SLACK_BOT_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes6 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

channels_create

Creates a new Slack channel. Name must be lowercase with no spaces (a-z, 0-9, _ or -).

channels_list

Lists channels in the workspace. Archived channels are excluded by default.

channels_invite

Invites one or more workspace members to a channel. Provide at least one user ID.

files_upload

Uploads a file from the server filesystem to a Slack channel. Optionally overrides the display filename and adds an initial comment.

messages_send

Sends a message to a Slack channel. Optionally posts as a threaded reply by providing thread_ts.

users_list

Lists members of the workspace.

// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretSLACK_BOT_TOKENecho "=xoxb-your-bot-token" > .env
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

6/6 tools missing one or more hints — channels_create (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); channels_list (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); channels_invite (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

Only 0/6 tools referenced in tests (0%)

Write tests that reference each tool by name so every tool has at least one test.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/themetralla3000/slack-mcp-server)](https://m8ven.ai/mcp/themetralla3000/slack-mcp-server)
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commit: aea0ffea1ae898fd313a93c341164735ce9adc5f
code hash: cfe2f59b169d2c4772b150d38b06f32e2f6d3bbc434ac1a2fe8acb7beadcbbca
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