Slack

Overview

Property	Value
Slug	`slack`
Category	Communication
Auth	OAuth 2.0 + PKCE
Base URL	`https://slack.com/api`
Tool count	134
Rate limit	1 req/sec, 50 req/min

Tool catalogue

Slack tools are surfaced through the MCP runtime (POST /api/v1/mcp/:serverId) and the HTTP chat endpoint (POST /api/v1/mcp/:serverId/chat). In router mode the model uses SEARCH_TOOLS to discover the right slug at runtime — you don’t bind a fixed REST resource ahead of time. The catalogue covers:

Area	Sample slugs	Approx. count
Channels & conversations	`SLACK_CREATE_CHANNEL`, `SLACK_LIST_ALL_CHANNELS`, `SLACK_INVITE_USERS_TO_A_SLACK_CHANNEL`, `SLACK_ARCHIVE_A_PUBLIC_OR_PRIVATE_CHANNEL`	30+
Messages & search	`SLACK_SEND_MESSAGE`, `SLACK_CHAT_POST_MESSAGE`, `SLACK_UPDATES_A_SLACK_MESSAGE`, `SLACK_SEARCH_MESSAGES`	16+
Scheduled messages	`SLACK_SCHEDULE_MESSAGE`, `SLACK_LIST_SCHEDULED_MESSAGES`, `SLACK_DELETE_A_SCHEDULED_MESSAGE_IN_A_CHAT`	5
Users & profile	`SLACK_LIST_ALL_USERS`, `SLACK_FIND_USER_BY_EMAIL_ADDRESS`, `SLACK_GET_USER_PRESENCE_INFO`, `SLACK_SET_SLACK_USER_PROFILE_INFORMATION`	23+
User groups	`SLACK_CREATE_A_SLACK_USER_GROUP`, `SLACK_UPDATE_USER_GROUP_MEMBERS`, `SLACK_LIST_USER_GROUPS_FOR_TEAM_WITH_OPTIONS`	7
Files	`SLACK_UPLOAD_OR_CREATE_A_FILE_IN_SLACK`, `SLACK_LIST_FILES_WITH_FILTERS_IN_SLACK`, `SLACK_ENABLE_PUBLIC_SHARING_OF_A_FILE`	15+
Reactions & stars	`SLACK_ADD_REACTION_TO_AN_ITEM`, `SLACK_FETCH_ITEM_REACTIONS`, `SLACK_ADD_A_STAR_TO_AN_ITEM`	6
Reminders	`SLACK_CREATE_A_REMINDER`, `SLACK_LIST_REMINDERS`, `SLACK_MARK_REMINDER_AS_COMPLETE`	5
Do Not Disturb	`SLACK_ACTIVATE_OR_MODIFY_DO_NOT_DISTURB_DURATION`, `SLACK_SET_DND_DURATION`, `SLACK_END_SNOOZE`	4
Emoji, team & workspace	`SLACK_ADD_EMOJI`, `SLACK_LIST_TEAM_CUSTOM_EMOJIS`, `SLACK_FETCH_WORKSPACE_SETTINGS_INFORMATION`	8+
Calls	`SLACK_REGISTERS_A_NEW_CALL_WITH_PARTICIPANTS`, `SLACK_ADD_CALL_PARTICIPANTS`, `SLACK_END_A_CALL_WITH_DURATION_AND_ID`	9
Auth	`SLACK_AUTH_TEST`	2

Discover the full list at runtime:

curl -N -X POST "https://api.routemcp.io/api/v1/mcp/<workspace_id>/chat" \
  -H "x-api-key: <YOUR_API_KEY>" \
  -H "x-session-id: <SESSION_ID>" \
  -H "content-type: application/json" \
  -d '{"message": "List every Slack tool that can post or schedule a message."}'

The model will call SEARCH_TOOLS({query: "post message"}) and stream the matched slugs back.

Connect setup

Slack uses OAuth 2.0 with PKCE against a Slack-registered app. One app per platform is enough — your end users authorise their own workspace by going through Slack’s consent screen.

Create a Slack app

Go to api.slack.com/apps → Create New App → From scratch. Under OAuth & Permissions, copy the Client ID and Client Secret.

Add the redirect URL

Under OAuth & Permissions → Redirect URLs, add:

https://api.routemcp.io/api/v1/connect/oauth/callback

Configure bot & user scopes

Add the bot token scopes your integration needs — e.g. channels:read, channels:history, chat:write, users:read, reactions:write, files:read, files:write, pins:write, reminders:write. Message search additionally requires the search:read user scope.

Connect via the widget

The end user opens the Connect widget, picks Slack, and is sent through Slack’s consent screen to authorise the workspace.

Usage

Through the chat endpoint (recommended)

# Post a message
curl -N -X POST "https://api.routemcp.io/api/v1/mcp/<workspace_id>/chat" \
  -H "x-api-key: sk_live_your_key" \
  -H "x-session-id: user-42" \
  -H "content-type: application/json" \
  -d '{"message": "Post `Deploy finished ✅` to the #engineering channel."}'

# Summarise recent activity
curl -N -X POST "https://api.routemcp.io/api/v1/mcp/<workspace_id>/chat" \
  -H "x-api-key: sk_live_your_key" \
  -H "x-session-id: user-42" \
  -H "content-type: application/json" \
  -d '{"message": "Summarise the last 20 messages in #support."}'

The agent loop picks SLACK_CHAT_POST_MESSAGE / SLACK_FETCH_CONVERSATION_HISTORY and streams results back as SSE.

Direct MCP JSON-RPC (Claude Desktop / Cursor / custom MCP clients)

{
  "mcpServers": {
    "routemcp": {
      "url": "https://api.routemcp.io/api/v1/mcp/<workspace_id>",
      "headers": {
        "x-api-key": "<YOUR_API_KEY>",
        "x-session-id": "<SESSION_ID>"
      }
    }
  }
}

Once connected, MCP clients can invoke any of the 134 tools by slug via the standard tools/call JSON-RPC method.

Overview

CRM

Accounting

Calendar

Developer

Productivity

Documents & Storage

Communication

Project Management

Database

Overview

Tool catalogue

Connect setup

Usage

Through the chat endpoint (recommended)

Direct MCP JSON-RPC (Claude Desktop / Cursor / custom MCP clients)

​Overview

​Tool catalogue

​Connect setup

​Usage

​Through the chat endpoint (recommended)

​Direct MCP JSON-RPC (Claude Desktop / Cursor / custom MCP clients)

Overview

Tool catalogue

Connect setup

Usage

Through the chat endpoint (recommended)

Direct MCP JSON-RPC (Claude Desktop / Cursor / custom MCP clients)