Slack ExplorerCAUTION
MCP server specialized in retrieving information from Slack messages and threads
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
A Model Context Protocol (MCP) server specialized in retrieving information from Slack messages and threads. It provides tools to access messages that the authenticated user can view using a User Token (xoxp).
Available Tools
- Message Search (
search_messages) - Search Slack messages with advanced filtering options. You can search by channel, user, date range, and specific features (reactions, files, etc.).
- Parameters
query: Basic search query. Use dedicated fields for inclusion modifiers (bare modifiers in this field are rejected). Exclusion modifiers prefixed with-(e.g.,-in:#channel) ARE allowed herein_channel: Filter by channel name (e.g., "general", "team-dev")from_user: Search messages from specific user (User ID)with: Search DMs/threads with specific users (array of User IDs)before,after,on: Date range filtering (YYYY-MM-DD format)during: Period specification (e.g., "July", "2023")has: Messages containing specific features (emoji, "pin", "file", "link", "reaction")hasmy: Messages where you reacted with specific emojisort: Sort method ("score" or "timestamp")count: Number of results per page (1-100, default: 20)page: Page number (1-100, default: 1)
- Thread Replies (
get_thread_replies) - Get all replies in a message thread. Supports pagination for efficiently handling large numbers of replies.
- Parameters
channel_id: Channel ID (required)thread_ts: Parent message timestamp (required)limit: Number of replies to retrieve (1-1000, default: 100)cursor: Pagination cursor
- User Profiles (
get_user_profiles) - Get profile information for multiple users in bulk. Retrieve display names, real names, email addresses, and other profile information by specifying a list of user IDs.
- Parameters
user_ids: Array of user IDs (required, max 100)
- Search Users by Di
e956e408db99OBSERVED · 2026-10-08Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add slack-explorer-mcp:0.12.0 -- docker run -i --rm ghcr.io/shibayu36/slack-explorer-mcp:0.12.0:None
Trust audit
CAUTIONgrade C · trust 75/100 Install with care. The audit found things worth knowing before you trust its output.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | WARN |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- declared (2 observation(s))
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- found
Findings (6)
SLACK_USER_TOKEN=xoxp-your-token ./slack-explorer-mcp
"-e", "SLACK_USER_TOKEN=xoxp-your-token-here",
-e SLACK_USER_TOKEN=xoxp-your-token-here \
"-e", "SLACK_USER_TOKEN=xoxp-your-token-here",
-e SLACK_USER_TOKEN=xoxp-your-token-here \
Gates applied: no_behavioural_pass.
e956e408db99full audit observations/trust-audit/mcp-server/shibayu36__slack-explorer.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-08 | e956e408db99 | CAUTION | C | 75 | first audit |
Questions
What is the Slack Explorer MCP server?
MCP server specialized in retrieving information from Slack messages and threads
Is Slack Explorer safe to connect to an agent?
With care. The audit graded it C (75/100) and found 6 things worth knowing before you trust this server, listed below with the exact line each was found on.
What credentials does Slack Explorer need?
No credential environment variables were found in its source, so it appears to need none.
How does Slack Explorer run?
It speaks stdio and streamable-http, so it runs as a local process your client starts.
How current is this page?
The grade is for one exact copy of the source (e956e408db99), read on 2026-10-08. The repository is watched and re-audited when it changes.