slack-mcp (redhat-community-ai-tools/slack-mcp) is an MCP server listed on the M8ven Trust Index. It scores 52 out of 100, grade D. It declares 10 tools. No publisher has claimed this listing.

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D
Caution
52/100

slack-mcp

Enables AI assistants to interact with Slack workspaces, providing tools for reading messages, posting content, managing channels, and more.

→ redhat-community-ai-tools/slack-mcp· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

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Who stands behind it

redhat-community-ai-tools

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
✅
10 tools verified — handlers match their declared behaviour
8 read-only tools verified — handlers contain no write/delete/exec
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
🔐
You'll be asked for 3 credentials: SLACK_BOT_TOKEN, SLACK_XOXC_TOKEN, SLACK_XOXD_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes10 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.

get_thread

Get all messages in a thread given a channel ID and the parent message timestamp.

get_channel_history

Get the history of a channel with pagination support. Limit parameter controls max messages to fetch (default 1000).

get_channel_id_by_name

Get the channel ID by channel name. The channel name can be with or without the # prefix.

refresh_channel_cache

Refresh the channel cache. Use this when new channels are created or if channel lookups are failing.

refresh_user_cache

Clear the user cache. Use this when user handles are outdated or if user lookups are failing. Returns the number of cached entries cleared.

get_reactions

Get reactions to a message.

whoami

Checks authentication & identity.

list_joined_channels

List channels the authenticated user is a member of.

search_messages

Search for messages in the workspace with pagination support. Limit parameter controls max results to fetch (default 1000).

search_channel_messages

Search for messages within a specific channel.

// 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.
configMCP_TRANSPORT"": "stdio",
🔐 secretSLACK_BOT_TOKENSet instead of SLACK_XOXC_TOKEN/SLACK_XOXD_TOKEN:
configLOGS_CHANNEL_ID"": "C7000000"
configOUTPUT_FORMAT
configSLACK_TEAM_ID
🔐 secretSLACK_XOXC_TOKENSet SLACK_BOT_TOKEN instead of /SLACK_XOXD_TOKEN:
🔐 secretSLACK_XOXD_TOKENSet SLACK_BOT_TOKEN instead of SLACK_XOXC_TOKEN/:
configFASTMCP_HOST
configFASTMCP_PORT
configALLOWED_HOSTS
// quality suggestions

All four hints declared on every tool

10/10 tools missing one or more hints — get_thread (missing: destructiveHint, idempotentHint); get_channel_history (missing: destructiveHint, idempotentHint); get_channel_id_by_name (missing: destructiveHint, idempotentHint), +7 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.

Destructive tools are labelled

1 tool perform destructive updates without destructiveHint — refresh_user_cache deletes at line 557 (USER_CACHE_FILE.unlink())

Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.

Tool inputs are validated

7/10 tool handlers declare input schemas (70%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 1/10 tool handlers wrap calls in try/catch (10%)

Wrap each tool handler body in try/catch and return a structured error response.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Tests exist

No test files found

Add tests that exercise each declared tool.

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 6 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 Verified](https://m8ven.ai/badge/mcp/redhat-community-ai-tools/slack-mcp?variant=verified)](https://m8ven.ai/mcp/redhat-community-ai-tools/slack-mcp)
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commit: 51104bd67796724defd3a1c724db6de2a782b75c
code hash: c08192cbe267707ea44fd493950a9327cd070ea75a670cfd2108b9e3a8e0325e
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