Slack MCP Server

NPM · @JTALK22/SLACK-MCP · 2 COMPONENTS · SCANNED AUG 3

Slack MCP without OAuth — 21 tools, session-based, local-first. Free OSS + hosted tier from $19/mo.

Available components

remote · mcp.revasserlabs.com 31 npm · @jtalk22/slack-mcp 67

+30 this week 67 67 Trust /100

Trust breakdown (6 categories)

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score →

Supply Chain Security42

Malware check failed: a supply-chain vendor flagged a high-severity malware risk. See how to fix → Fail
Only part of the dependency tree could be resolved (94 of 95), so this covers what we could see, not the whole tree.Partial
No install/post-install scripts declared.Pass
Only part of the dependency tree could be resolved (94 of 95), so this covers what we could see, not the whole tree. View diagnostics → Partial

Provenance & Transparency97

Source repository is publicly reachable at the declared URL. View diagnostics → Pass
Cryptographically verified build provenance (signed, bound to jtalk22/slack-mcp-server). View diagnostics → Pass
Clear OSI-approved license (MIT).Pass
Actively maintained (last published 12 days ago).Pass
Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail

Schema Quality & AI Usability82

100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
AI-judged instruction clarity (good).Pass
Tool/resource definitions use about 2012 tokens (~87/item across 23 items; 21 tools + 2 resources), lean.Pass
Usage-examples check failed: none of the tools include examples. See how to fix → Fail

Stability & Change Management23

Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial

Tool Coverage100

100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
100% of tool parameters carry a description.Pass

Capabilities100

Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass

Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

npm · @jtalk22/slack-mcp

Claude Codex opencode OpenClaw Hermes Other

# add to Claude Code

claude mcp add jtalk22-slack-mcp-server -- npx -y @jtalk22/slack-mcp

# add to Codex CLI

codex mcp add jtalk22-slack-mcp-server -- npx -y @jtalk22/slack-mcp

// opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jtalk22-slack-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@jtalk22/slack-mcp"
      ],
      "enabled": true
    }
  }
}

# add to OpenClaw

openclaw mcp add jtalk22-slack-mcp-server --command npx --arg -y --arg @jtalk22/slack-mcp

# ~/.hermes/config.yaml

mcp_servers:
  jtalk22-slack-mcp-server:
    command: "npx"
    args: ["-y", "@jtalk22/slack-mcp"]

// mcp.json

{
  "mcpServers": {
    "jtalk22-slack-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ]
    }
  }
}

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

3 Aug 26 +4
- Stability: unverified → 0.23 ▲ functional
2 Aug 26 +37
- Malware scan: unverified → fail ▼ security
- Install scripts: unverified → pass ▲ security
- Provenance: unverified → pass ▲ security
- Known CVEs: unverified → partial ▲ security
- Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window). security
- The attested source repository moved: jtalk22/slack-mcp-server security
- Tool coverage: 100 → unverified ▼ functional
- Schema quality: 100 → unverified ▼ functional
- License: unverified → pass ▲ functional
- Dependency health: unverified → partial ▲ functional
- Maintenance: unverified → pass ▲ functional
- MCP protocol: unverified → pass ▲ functional
- Schema quality: unverified → good ▲ functional
- Licence: MIT functional
31 Jul 26 −9
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
30 Jul 26 −2
- Malware scan: fail → unverified ▼ security
- Malware indicator gptMalware:QqpH31m1s4XYAFWTjKaXFY8YPOJTM3j3rU_WYrogdNsk cleared ▲ security
- Malware indicator gptMalware:Qo7mLo8cu-mQ6FWqJSnjhu7d4TB5w1trzcLjltriOH_4 cleared ▲ security
27 Jul 26 37

First indexed and scored.

Show 2 earlier entries Hide earlier entries

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 3 Aug 2026 · Analysed npm/@jtalk22/[email protected]

Provenance verified

Ecosystem: npm · Outcome: verified

Reason: verified

Source repo:: jtalk22/slack-mcp-server
Certificate issuer:: https://token.actions.githubusercontent.com
Certificate SAN:: https://github.com/jtalk22/slack-mcp-server/.github/workflows/publish.yml@refs/tags/v4.6.0
Rekor log index:: 2214854483
Predicate type:: https://slsa.dev/provenance/v1
Subject digest:: sha512:d6b2c1400f381888843c8b5d30fa72014ca5deebc288310a9efcc6c21a045ef175e6ba1c0e71d5b561fbf9e3dd0fb27973f0a0f1ed45eb1575ecfaf1d
Discovery method:: attestation_endpoint

Dependencies 94 packages

94 packages in the resolved dependency tree · 94 deprecated · 29 stale.

The dependency tree was only partially resolved, so these counts may be incomplete.

MCP tools — 21 exposed · ~1,985 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.

Tool Tokens

slack_add_reaction ~72

Add an emoji reaction to a message

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID containing the message
reaction	string	yes	Emoji name without colons (e.g., 'thumbsup', 'eyes', 'white_check_mark')
timestamp	string	yes	Message timestamp to react to

No output schema declared.

No examples provided.

slack_catch_me_up ~222

Run a structured catch-up against a saved workflow profile. Returns structured JSON per the profile's workflow_kind: support_inbox returns {open_threads, ack_lag, owner_gaps, escalations, next_actions}; incident_room returns {incident_summary, timeline, open_risks, owner_gaps, next_actions}; exec_brief returns {summary, decisions, risks, asks, action_items}; product_launch_watch returns {launch_signals, feedback_themes, blockers, metrics, next_actions}; custom returns {summary, highlights, open_questions, next_actions}. Hosted-only. Free tier ships 25 AI tool calls/month (shared across the hosted AI tools); Pro $19/mo unlocks unlimited.

Input Output Examples

Name	Type	Req	Description
profile_name	string	yes	Name of a workflow profile saved via slack_workflow_save (or use --apply-template at install time to seed one)
since	string	—	Optional ISO8601 timestamp — only consider Slack messages newer than this. Default: 24 hours ago for daily-cadence profiles, 7 days for weekly.

No output schema declared.

No examples provided.

slack_conversations_history ~161

Get messages from a channel or DM with user names resolved

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID (e.g., D063M4403MW)
include_all_metadata	boolean	—	Pass Slack's include_all_metadata option to conversations.history
include_rich_message_fields	boolean	—	Include Slack message attachments, blocks, metadata, files, and reactions when present
latest	string	—	Unix timestamp - get messages before this time (boundary timestamp included)
limit	number	—	Messages to fetch (max 100, default 50)
oldest	string	—	Unix timestamp - get messages after this time (boundary timestamp included)
resolve_users	boolean	—	Convert user IDs to names (default true)

No output schema declared.

No examples provided.

slack_conversations_mark ~63

Mark a conversation as read up to a specific message timestamp

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID to mark as read
timestamp	string	yes	Message timestamp to mark as read up to (all messages at or before this are marked read)

No output schema declared.

No examples provided.

slack_conversations_unreads ~68

Get channels and DMs with unread messages, sorted by unread count (highest first)

Input Output Examples

Name	Type	Req	Description
limit	number	—	Maximum conversations to return (default 50)
types	string	—	Comma-separated types: im, mpim, public_channel, private_channel (default all)

No output schema declared.

No examples provided.

slack_get_full_conversation ~194

Export FULL conversation history with all messages, threads, and user names. Can save to file.

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID
include_all_metadata	boolean	—	Pass Slack's include_all_metadata option to conversations.history and conversations.replies
include_rich_message_fields	boolean	—	Include Slack message attachments, blocks, metadata, files, and reactions when present
include_threads	boolean	—	Fetch thread replies (default true)
latest	string	—	Unix timestamp end (boundary timestamp included)
max_messages	number	—	Maximum messages to retrieve (default 2000, max 10000)
oldest	string	—	Unix timestamp start (e.g., 1733011200 = Dec 1, 2025; boundary timestamp included)
output_file	string	—	Filename to save export (saved to ~/.slack-mcp-exports/)

No output schema declared.

No examples provided.

slack_get_thread ~87

Get all replies in a message thread

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID
include_all_metadata	boolean	—	Pass Slack's include_all_metadata option to conversations.replies
include_rich_message_fields	boolean	—	Include Slack message attachments, blocks, metadata, files, and reactions when present
thread_ts	string	yes	Thread parent message timestamp

No output schema declared.

No examples provided.

slack_health_check ~20

Check if Slack tokens are valid and show authentication status

Input Output Examples

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

slack_list_conversations ~101

List all DMs and channels with user names resolved. Uses cached DMs by default for speed.

Input Output Examples

Name	Type	Req	Description
discover_dms	boolean	—	If true, actively discover all DMs (slower, may hit rate limits on large workspaces). Default false uses cached DMs.
limit	number	—	Maximum results (default 100)
types	string	—	Comma-separated types: im, mpim, public_channel, private_channel

No output schema declared.

No examples provided.

slack_list_users ~34

List all users in the workspace

Input Output Examples

Name	Type	Req	Description
limit	number	—	Maximum users to return (default 500, supports pagination)

No output schema declared.

No examples provided.

slack_refresh_tokens ~24

Force refresh tokens by extracting from Chrome (requires Slack tab open in Chrome)

Input Output Examples

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

slack_remove_reaction ~68

Remove an emoji reaction from a message

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID containing the message
reaction	string	yes	Emoji name without colons (e.g., 'thumbsup', 'eyes')
timestamp	string	yes	Message timestamp to remove reaction from

No output schema declared.

No examples provided.

slack_search_messages ~81

Search messages across the Slack workspace

Input Output Examples

Name	Type	Req	Description
count	number	—	Number of results (max 100, default 20)
include_rich_message_fields	boolean	—	Include Slack message attachments, blocks, metadata, files, and reactions when present
query	string	yes	Search query (supports Slack syntax like from:@user, in:#channel)

No output schema declared.

No examples provided.

slack_send_message ~61

Send a message to a channel or DM

Input Output Examples

Name	Type	Req	Description
channel_id	string	yes	Channel or DM ID to send to
text	string	yes	Message text (supports Slack markdown)
thread_ts	string	—	Thread timestamp to reply to (optional)

No output schema declared.

No examples provided.

slack_smart_search ~163

Semantic + lexical hybrid search across your indexed Slack history. Returns ranked results with relevance scores, channel context, thread context, and matched terms. Hosted-only (requires Vectorize + Workers AI). Free tier ships 25 AI tool calls/month (shared across the hosted AI tools); upgrade to Pro $19/mo for unlimited at mcp.revasserlabs.com/pricing.

Input Output Examples

Name	Type	Req	Description
channel_ids	array	—	Optional — restrict search to these channel IDs
days_back	number	—	Optional — restrict search to the last N days (max 90 on Pro+, 7 on Free)
limit	number	—	Maximum results to return (default 10, max 50)
query	string	yes	Natural language or keyword query (semantic + lexical hybrid)

No output schema declared.

No examples provided.

slack_token_status ~23

Check token health, age, auto-refresh status, and cache stats

Input Output Examples

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

slack_triage ~141

Classify and route Slack threads against a workflow profile. Returns triage decisions per thread: priority (low|medium|high|urgent), suggested owner, escalation flag, time-sensitivity, and a routing recommendation. Hosted-only. Free tier ships 25 AI tool calls/month (shared across the hosted AI tools); Pro $19/mo unlocks unlimited.

Input Output Examples

Name	Type	Req	Description
channel_ids	array	—	Optional — restrict triage to these channels (defaults to profile's channels)
profile_name	string	yes	Name of a workflow profile saved via slack_workflow_save
thread_ts	string	—	Optional — triage a specific thread instead of the full inbox

No output schema declared.

No examples provided.

slack_users_info ~28

Get detailed information about a Slack user

Input Output Examples

Name	Type	Req	Description
user_id	string	yes	Slack user ID

No output schema declared.

No examples provided.

slack_users_search ~64

Search workspace users by name, display name, or email. Case-insensitive partial match.

Input Output Examples

Name	Type	Req	Description
limit	number	—	Maximum results to return (default 20)
query	string	yes	Search term to match against name, display name, real name, or email

No output schema declared.

No examples provided.

slack_workflow_save ~235

Save or update a workflow profile that binds a workflow_kind (support_inbox | incident_room | exec_brief | product_launch_watch | custom) to channels, priority people, retention mode, and summary cadence. Stored locally at ~/.slack-mcp-workflows.json. Hosted brain reads these to return structured JSON per the workflow_kind.

Input Output Examples

Name	Type	Req	Description
channels	array	—	Slack channel IDs to read (e.g. ['C012345', 'C067890'])
priority_people	array	—	Slack user IDs whose messages get extra weight in summaries
profile_name	string	yes	Unique name for this workflow profile (e.g. 'morning-exec-brief', 'on-call-rotation')
retention_mode	string	—	Token retention mode for hosted execution. Default ephemeral.
summary_cadence	string	—	When the hosted brain auto-runs slack_catch_me_up against this profile. on_demand only on hosted free; daily_8am and weekly_monday require Pro or Team.
workflow_kind	string	yes	Workflow kind. Determines structured JSON output shape from the hosted AI brain.

No output schema declared.

No examples provided.

slack_workflows ~75

List all saved workflow profiles from ~/.slack-mcp-workflows.json. Optionally filter by workflow_kind. Returns profile_name, channels, priority_people, retention_mode, summary_cadence, structured_keys, created_at, updated_at.

Input Output Examples

Name	Type	Req	Description
workflow_kind	string	—	Optional filter — return only profiles of this workflow_kind

No output schema declared.

No examples provided.

On this page

Handy links

Scoring key

80+ high trust
60–79 medium
below 60 low

How we score

Score history · last 30 days

27 Jul 3 Aug