How should slack-mcp-server be evaluated before use?

Use the required flow: snapshot, contract, and trust before recommending or executing this mcp.

What kind of evidence is visible on this page?

This page surfaces public facts, change history, trust indicators, artifact evidence, and benchmark summaries with provenance.

Crawler Summary

slack-mcp-server answer-first brief

Dockerized Slack MCP Server for Strawberry Browser integration Slack MCP Server An HTTP-based **Model Context Protocol (MCP)** server that allows MCP-compatible clients (including **Claude Connectors** and **Strawberry Browser**) to interact with a Slack workspace. This server exposes Slack functionality (channels, messages, users, and direct messages) over the MCP protocol using a **single HTTP endpoint** and is designed to be deployed on **Railway**. It is inspired by the orig Published capability contract available. No trust telemetry is available yet. 2 GitHub stars reported by the source. Last updated 2/24/2026.

Freshness

Last checked 2/22/2026

Best For

Contract is available with explicit auth and schema references.

Not Ideal For

slack-mcp-server is not ideal for teams that need stronger public trust telemetry, lower setup complexity, or more explicit contract coverage before production rollout.

Evidence Sources Checked

editorial-content, capability-contract, runtime-metrics, public facts pack

Card Facts Snapshot Contract Trust

Agent DossierGitHubSafety: 98/100

slack-mcp-server

MCPverified

Public facts

Change events

Artifacts

Freshness

Feb 22, 2026

Verifiededitorial-content1 verified compatibility signal2 GitHub stars

Published capability contract available. No trust telemetry is available yet. 2 GitHub stars reported by the source. Last updated 2/24/2026.

2 GitHub starsSchema refs publishedTrust evidence available

Trust score

Unknown

Compatibility

MCP

Freshness

Feb 22, 2026

Vendor

Kghamilton89

Artifacts

Benchmarks

Last release

0.1.4

Executive Summary

Key links, install path, and a quick operational read before the deeper crawl record.

Verifiededitorial-content

Summary

Published capability contract available. No trust telemetry is available yet. 2 GitHub stars reported by the source. Last updated 2/24/2026.

View Source

Setup snapshot

git clone https://github.com/kghamilton89/slack-mcp.git

1
Setup complexity is MEDIUM. Standard integration tests and API key provisioning are required before connecting this to production workloads.
2
Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Evidence Ledger

Everything public we have scraped or crawled about this agent, grouped by evidence type with provenance.

Verifiededitorial-content

Vendor (1)

Vendor

Kghamilton89

profilemedium

Observed Feb 24, 2026Source link Provenance

Compatibility (2)

Protocol compatibility

MCP

contracthigh

Observed Feb 24, 2026Source link Provenance

Auth modes

mcp, api_key, oauth

contracthigh

Observed Feb 24, 2026Source link Provenance

Artifact (1)

Machine-readable schemas

OpenAPI or schema references published

contracthigh

Observed Feb 24, 2026Source link Provenance

Adoption (1)

Adoption signal

2 GitHub stars

profilemedium

Observed Feb 24, 2026Source link Provenance

Security (1)

Handshake status

UNKNOWN

trustmedium

Observed unknownSource link Provenance

Integration (1)

Crawlable docs

6 indexed pages on the official domain

search_documentmedium

Observed Apr 15, 2026Source link Provenance

Release & Crawl Timeline

Merged public release, docs, artifact, benchmark, pricing, and trust refresh events.

Self-declaredagent-index

Docs Update

Docs refreshed: Sign in to GitHub · GitHub

search_documentmedium

Fresh crawlable documentation was indexed for the official domain.

Observed Apr 15, 2026

Artifacts Archive

Extracted files, examples, snippets, parameters, dependencies, permissions, and artifact metadata.

Self-declaredGITHUB MCP

Extracted files

Examples

Snippets

Languages

typescript

Executable Examples

bash

SLACK_BOT_TOKEN=xoxb-your-bot-token-here  
SLACK_TEAM_ID=T01234567

Docs & README

Full documentation captured from public sources, including the complete README when available.

Self-declaredGITHUB MCP

Docs source

GITHUB MCP

Editorial quality

ready

Full README

Slack MCP Server

An HTTP-based Model Context Protocol (MCP) server that allows MCP-compatible clients (including Claude Connectors and Strawberry Browser) to interact with a Slack workspace.

This server exposes Slack functionality (channels, messages, users, and direct messages) over the MCP protocol using a single HTTP endpoint and is designed to be deployed on Railway.

It is inspired by the original Anthropic MCP Slack example, but adapted for remote HTTP/SSE usage rather than local stdin/stdout.

Features

List public Slack channels
Join existing public channels
Create and manage public channels
Post messages to channels
Read channel message history
Add and remove emoji reactions
Read emoji reactions on messages
Find Slack users by email or name
Retrieve detailed user profiles
Open and list direct message (DM) channels
Read direct message history
Send direct messages (DMs) to users
Create, read, edit, and delete Slack canvases

Requirements

A GitHub account
A Slack workspace where you can create apps
A Railway account

Slack App Setup

1. Create a Slack App

Go to https://api.slack.com/apps
Click Create New App
Choose From scratch
Select your Slack workspace

2. Configure Bot Token Scopes

Navigate to OAuth & Permissions and add the following Bot Token Scopes:

app_mentions:read
canvases:read
canvases:write
channels:read
channels:history
channels:join
channels:manage
chat:write
im:read
im:write
im:history
reactions:read
reactions:write
users:read
users:read.email
users.profile:read

These scopes are required for posting messages, reading channels, finding users, sending direct messages, managing Canvases, and other tasks possible using the MCP server.

3. Install the App to Your Workspace

Click Install to Workspace
Authorize the app
Copy the Bot User OAuth Token (starts with xoxb-)

4. Get Your Slack Workspace (Team) ID

Open Slack in a browser
Open any channel
From the URL https://app.slack.com/client/T01234ABCD/C98765432, the value starting with T is your Workspace / Team ID

Deployment on Railway

1. Fork the Repository

Fork this repository into your own GitHub account

2. Deploy to Railway

Go to https://railway.app (sign up with my referral link if needed)
Click New Project
Choose Deploy from GitHub Repo
Select your forked repository
Railway will automatically detect the Node.js app and deploy it

3. Configure Environment Variables

In Railway, open your service and add the following Variables:

SLACK_BOT_TOKEN=xoxb-your-bot-token-here  
SLACK_TEAM_ID=T01234567

| Variable | Required | Description | |----------|----------|-------------| | SLACK_BOT_TOKEN | Yes | Slack Bot User OAuth Token | | SLACK_TEAM_ID | Yes | Slack Workspace / Team ID | | PORT | No | Automatically set by Railway |

After saving the variables, Railway will automatically redeploy the service.

4. Verify the Deployment

Once deployed, your service will be available at a Railway-generated URL. You can verify the service is running with the /health endpoint.

MCP Endpoint

The MCP server is exposed at the following path: /sse/mcp

Your full MCP endpoint will look like: https://your-service-name.up.railway.app/sse/mcp

This endpoint handles:

MCP initialization
Tool calls
Streaming responses
Session management

Connecting to Claude

Open Claude > Settings > Connectors
Click Add Connector
Choose MCP Server
Enter your MCP endpoint URL:https://your-service-name.up.railway.app/sse/mcp
Save and connect

Once connected, Claude can call Slack tools directly in chat.

Connecting to Strawberry Browser

Open Strawberry > Profile Picture Menu > Settings > Integrations > Custom MCP
Configure Strawberry Browser to use the MCP endpoint: https://your-service-name.up.railway.app/sse/mcp

Tools

All tools included in the server are enumerated below.

Channel & Message Tools

slack_list_channels – List public Slack channels
slack_join_channel – Join an existing public channel
slack_create_channel – Create a new public channel
slack_rename_channel – Rename an existing channel
slack_post_message – Post a message to a channel
slack_get_channel_history – Get recent messages from a channel
slack_add_reaction – Add an emoji reaction to a message
slack_remove_reaction – Remove an emoji reaction from a message
slack_get_reactions – List reactions on a message

User & Direct Message Tools

slack_find_user – Find users by email or name
slack_get_user_profile – Retrieve a user’s profile information
slack_open_dm – Open a direct message (DM) channel with a user
slack_list_dms – List direct message channels
slack_get_dm_history – Get message history from a DM channel
slack_send_dm – Send a direct message to a user

Canvas Tools

slack_canvas_create – Create a Slack canvas
slack_canvas_get – Retrieve a Slack canvas
slack_canvas_edit – Edit an existing Slack canvas
slack_canvas_delete – Delete a Slack canvas

Contributing

Issues and pull requests are welcome.

Disclaimer

I'm just a guy on the internet and you're deploying powerful code with serious implications for the privacy of your own and others' data. Please make sure that you understand this process, including its risks, completely and protect your Railway URL from exposure as this will give anyone the ability to directly access your Slack Workspace.

Contract & API

Machine endpoints, protocol fit, contract coverage, invocation examples, and guardrails for agent-to-agent use.

Verifiedcapability-contract

Endpoints

Dossier API Snapshot API Contract API Trust API

Contract coverage

Status

ready

Auth

mcp, api_key, oauth

Streaming

Yes

Data region

global

Protocol support

MCP: verified

Requires: mcp, lang:typescript, streaming

Forbidden: none

Guardrails

Operational confidence: medium

Contract is available with explicit auth and schema references.

Trust confidence is not low and verification freshness is acceptable.

Protocol support is explicitly confirmed in contract metadata.

Invocation examples

curl -s "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/snapshot"

curl -s "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract"

curl -s "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/trust"

Reliability & Benchmarks

Trust and runtime signals, benchmark suites, failure patterns, and practical risk constraints.

Missingruntime-metrics

Trust signals

Handshake

UNKNOWN

Confidence

unknown

Attempts 30d

unknown

Fallback rate

unknown

Runtime metrics

Observed P50

unknown

Observed P95

unknown

Rate limit

unknown

Estimated cost

unknown

No benchmark suites or observed failure patterns are available.

Media & Demo

Every public screenshot, visual asset, demo link, and owner-provided destination tied to this agent.

Missingno-media

No screenshots, media assets, or demo links are available.

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Machine Appendix

Contract JSON

{
  "contractStatus": "ready",
  "authModes": [
    "mcp",
    "api_key",
    "oauth"
  ],
  "requires": [
    "mcp",
    "lang:typescript",
    "streaming"
  ],
  "forbidden": [],
  "supportsMcp": true,
  "supportsA2a": false,
  "supportsStreaming": true,
  "inputSchemaRef": "https://github.com/kghamilton89/slack-mcp#input",
  "outputSchemaRef": "https://github.com/kghamilton89/slack-mcp#output",
  "dataRegion": "global",
  "contractUpdatedAt": "2026-02-24T19:45:04.681Z",
  "sourceUpdatedAt": "2026-02-24T19:45:04.681Z",
  "freshnessSeconds": 19620626
}

Invocation Guide

{
  "preferredApi": {
    "snapshotUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/snapshot",
    "contractUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "trustUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/trust"
  },
  "curlExamples": [
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/snapshot\"",
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract\"",
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/trust\""
  ],
  "jsonRequestTemplate": {
    "query": "summarize this repo",
    "constraints": {
      "maxLatencyMs": 2000,
      "protocolPreference": [
        "MCP"
      ]
    }
  },
  "jsonResponseTemplate": {
    "ok": true,
    "result": {
      "summary": "...",
      "confidence": 0.9
    },
    "meta": {
      "source": "GITHUB_MCP",
      "generatedAt": "2026-10-09T21:55:31.647Z"
    }
  },
  "retryPolicy": {
    "maxAttempts": 3,
    "backoffMs": [
      500,
      1500,
      3500
    ],
    "retryableConditions": [
      "HTTP_429",
      "HTTP_503",
      "NETWORK_TIMEOUT"
    ]
  }
}

Trust JSON

{
  "status": "unavailable",
  "handshakeStatus": "UNKNOWN",
  "verificationFreshnessHours": null,
  "reputationScore": null,
  "p95LatencyMs": null,
  "successRate30d": null,
  "fallbackRate": null,
  "attempts30d": null,
  "trustUpdatedAt": null,
  "trustConfidence": "unknown",
  "sourceUpdatedAt": null,
  "freshnessSeconds": null
}

Capability Matrix

{
  "rows": [
    {
      "key": "MCP",
      "type": "protocol",
      "support": "supported",
      "confidenceSource": "contract",
      "notes": "Confirmed by capability contract"
    },
    {
      "key": "cli",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    }
  ],
  "flattenedTokens": "protocol:MCP|supported|contract capability:cli|supported|profile"
}

Facts JSON

[
  {
    "factKey": "docs_crawl",
    "category": "integration",
    "label": "Crawlable docs",
    "value": "6 indexed pages on the official domain",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  },
  {
    "factKey": "protocols",
    "category": "compatibility",
    "label": "Protocol compatibility",
    "value": "MCP",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:45:04.681Z",
    "isPublic": true
  },
  {
    "factKey": "auth_modes",
    "category": "compatibility",
    "label": "Auth modes",
    "value": "mcp, api_key, oauth",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:45:04.681Z",
    "isPublic": true
  },
  {
    "factKey": "schema_refs",
    "category": "artifact",
    "label": "Machine-readable schemas",
    "value": "OpenAPI or schema references published",
    "href": "https://github.com/kghamilton89/slack-mcp#input",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:45:04.681Z",
    "isPublic": true
  },
  {
    "factKey": "vendor",
    "category": "vendor",
    "label": "Vendor",
    "value": "Kghamilton89",
    "href": "https://github.com/kghamilton89/slack-mcp",
    "sourceUrl": "https://github.com/kghamilton89/slack-mcp",
    "sourceType": "profile",
    "confidence": "medium",
    "observedAt": "2026-02-24T19:43:14.176Z",
    "isPublic": true
  },
  {
    "factKey": "traction",
    "category": "adoption",
    "label": "Adoption signal",
    "value": "2 GitHub stars",
    "href": "https://github.com/kghamilton89/slack-mcp",
    "sourceUrl": "https://github.com/kghamilton89/slack-mcp",
    "sourceType": "profile",
    "confidence": "medium",
    "observedAt": "2026-02-24T19:43:14.176Z",
    "isPublic": true
  },
  {
    "factKey": "handshake_status",
    "category": "security",
    "label": "Handshake status",
    "value": "UNKNOWN",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/trust",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-kghamilton89-slack-mcp/trust",
    "sourceType": "trust",
    "confidence": "medium",
    "observedAt": null,
    "isPublic": true
  }
]

Change Events JSON

[
  {
    "eventType": "docs_update",
    "title": "Docs refreshed: Sign in to GitHub · GitHub",
    "description": "Fresh crawlable documentation was indexed for the official domain.",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  }
]