# Slack MCP Server

> Slack MCP Server is an officially published MCP server from Slack. Anomity scores its risk at 20 out of 100 (low).

- **Canonical URL:** https://catalog.anomity.ai/mcp/slack-mcp-server
- **Kind:** MCP server
- **Publisher:** Slack
- **Trust level:** official
- **Risk score:** 20/100 (low)
- **Website:** https://api.slack.com/docs/mcp
- **Documentation:** https://api.slack.com/docs/mcp
- **Last updated:** 2026-09-02
- **JSON:** https://catalog.anomity.ai/api/entries/mcp/slack-mcp-server

## Description

Slack's official remote MCP server gives agents access to messages, channels, users, and canvases — reading conversation history for context and posting on your behalf.

Capabilities are outbound network access and credential access. Slack is simultaneously the richest informal knowledge base in most companies and the least curated one: an integration that can search history can surface things said in confidence years ago. It is also a first-class injection surface, since anyone in a shared channel can write text an agent will later read. Scope to specific channels, prefer read-only, and treat an agent that can post as an agent that can be socially engineered into posting.

## Why it scored 20

The score starts at the catalog's neutral base of 50 and moves only through the signals below. The formula is published at https://catalog.anomity.ai/about — there is no model and no hidden heuristic.

| Signal | Contribution | Severity | Evidence |
| --- | --- | --- | --- |
| Published by the vendor | -40 | trust offset |  |
| 1 high-risk capability: credentials:access | +10 | high |  |

Clamped result: **20/100**, band **low**.

## Capabilities

| Capability | Name | Security implication |
| --- | --- | --- |
| `network:outbound` | Outbound network | Can make outbound network requests. Required for hosted model providers and remote APIs; also the path for data exfiltration if combined with read access. |
| `credentials:access` | Credentials access | Reads provider API keys, OAuth tokens, or other secrets from the host keychain or environment. |

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- [Airtable MCP Server](https://catalog.anomity.ai/mcp/airtable-mcp-server) — risk 45 (medium)
- [Cloudflare MCP Server](https://catalog.anomity.ai/mcp/cloudflare-mcp-server) — risk 45 (medium)
- [ElevenLabs MCP Server](https://catalog.anomity.ai/mcp/elevenlabs-mcp-server) — risk 45 (medium)
- [MiniMax MCP Server](https://catalog.anomity.ai/mcp/minimax-mcp-server) — risk 45 (medium)
- [MongoDB MCP Server](https://catalog.anomity.ai/mcp/mongodb-mcp-server) — risk 45 (medium)
- [Neon MCP Server](https://catalog.anomity.ai/mcp/neon-mcp-server) — risk 45 (medium)

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Source: Anomity Catalog (https://catalog.anomity.ai/). Scoring methodology: https://catalog.anomity.ai/about. Machine-readable index: https://catalog.anomity.ai/llms.txt · https://catalog.anomity.ai/openapi.json