mcp-server-slack

mcp-server-slack is an MCP (Model Context Protocol) server that integrates a client/agent with Slack, enabling the agent to perform Slack-related actions and/or fetch information via MCP tools.

Evaluated Apr 04, 2026 (25d ago)
Homepage ↗ Repo ↗ Communication mcp slack chatops agents automation
⚙ Agent Friendliness
40
/ 100
Can an agent use this?
🔒 Security
48
/ 100
Is it safe for agents?
⚡ Reliability
20
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
55
Documentation
35
Error Messages
0
Auth Simplicity
55
Rate Limits
20

🔒 Security

TLS Enforcement
70
Auth Strength
50
Scope Granularity
40
Dep. Hygiene
35
Secret Handling
40

Specific security controls (TLS requirement in transport, how secrets are passed/stored, and Slack scope minimization) are not verifiable from the provided information. Treat Slack credentials and tool permissions as high-sensitivity.

⚡ Reliability

Uptime/SLA
0
Version Stability
50
Breaking Changes
0
Error Recovery
30
AF Security Reliability

Best When

You want an agent-driven Slack integration using the MCP tool standard rather than building custom Slack logic.

Avoid When

You need a strict REST/GraphQL/SDK interface instead of MCP, or you cannot obtain/handle required Slack credentials securely.

Use Cases

  • ChatOps: letting an agent respond to Slack messages
  • Automating Slack workflows (e.g., posting updates, creating summaries)
  • Retrieving Slack context (messages/channels) for agent reasoning
  • Building internal support/ops assistants backed by Slack data

Not For

  • High-security environments without clear Slack auth scoping and secrets management documentation
  • Latency-sensitive realtime applications where Slack tool calls would be too slow
  • Use cases requiring complex enterprise compliance guarantees not documented by the package

Interface

REST API
No
GraphQL
No
gRPC
No
MCP Server
Yes
SDK
No
Webhooks
No

Authentication

Methods: Slack OAuth or Slack token-based authentication (exact method not confirmed from provided data)
OAuth: No Scopes: No

Authentication details (OAuth vs token, required scopes, and how credentials are supplied) are not present in the provided content, so exact auth strength/scoping cannot be verified.

Pricing

Free tier: No
Requires CC: No

No pricing information provided; as an MCP server, cost is typically determined by your hosting/infrastructure and any Slack plan/API limits.

Agent Metadata

Pagination
unknown
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • Slack API rate limits can cause tool failures; agents may need retry/backoff logic if not documented
  • Agents may unintentionally post/DM sensitive content if message-posting tools are not permissioned/scoped carefully
  • Slack message retrieval may require correct channel identifiers and/or pagination handling

Alternatives

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Scores are editorial opinions as of 2026-04-04.

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