MCP Index
Official MCPGenerally availablePublishes llms.txt

Slack MCP Server

Solid all-round agent support with no single blocker.

Use the official server, not the popular community ones — same permissions model as the user, plus admin approval. Covers a curated subset of the Web API, not all 200+ methods.

Communication
4/5

Agent-readiness

Good overall

Weighted across four pillars

Reach4.5
Cost5
Control2.5
Trust5
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What an agent can do here

Slack's own remote MCP server went GA in February 2026 — agents search, read and post inside the authenticating user's existing permissions.

Action depth
Core write

Agents can do the product’s core job — edit the timeline, ship the deploy, update the record.

Hosting
Vendor-hosted

Connect with a URL — nothing to install.

Auth
OAuth
Unattended
Needs a human

Interactive OAuth only — it cannot be provisioned without someone clicking through.

Blast radius
High

A wrong call is expensive, public, or irreversible.

Permission scoping: Granular scopes

What it costs to let an agent act

FreeUnmetered

Server is free; some capabilities (canvases) require a paid Slack plan, and a workspace admin must approve the app.

How the score breaks down

Every factor below is scored by a fixed rubric, not by opinion — so two tools with the same shape always get the same number.

Reach

Excellent4.5/5

Can an agent actually do the job?

  • MCP serverFirst-party2/2
  • Action depthCore write1/1.5
  • HostingVendor-hosted1/1
  • Fallback pathAPI + CLI0.5/0.5

Cost

Excellent5/5

What does it cost to let the agent act?

  • Plan requiredFree3/3
  • Usage meteringUnmetered2/2

Control

Workable2.5/5

Can I let it run unattended?

  • Permission scopingGranular scopes1.5/1.5
  • Unattended authHuman OAuth0/1.5
  • Blast radiusHigh0.5/1.5
  • Auth frictionOAuth0.5/0.5

Trust

Excellent5/5

Will this still work next month?

  • MaintainerVendor2/2
  • MaturityGenerally available1.5/1.5
  • Research confidenceHigh1/1
  • FreshnessVerified 2d ago0.5/0.5

Slack vs other communication tools

Sorted by overall score. Filter and sort the full category →

Communication MCP servers compared
ToolOverallReachCostControlTrustCost to actCan doRisk
ZoomExcellentOfficial MCP docs exist and the API underneath is mature; the practical gate is that the useful data (recordings, transcripts) lives on paid plans.
4.5
4.5
5
4
4.5
FreeUnmeteredCore writeHeadlessMediumblast radius
SlackGoodUse the official server, not the popular community ones — same permissions model as the user, plus admin approval. Covers a curated subset of the Web API, not all 200+ methods.
4
4.5
5
2.5
5
FreeUnmeteredCore writeNeeds a humanHighblast radius
IntercomGoodClean official server with read/write on conversations; the only gate is that Intercom itself is paid.
4
4.5
3.5
3.5
5
Paid planUnmeteredCore writeHeadlessHighblast radius
TwilioGoodGenuinely agent-ready, and genuinely dangerous: write actions send real SMS and calls. Use a scoped API key, not account credentials.
3.5
4
4
2.5
3.5
FreeUsage-meteredCore writeHeadlessHighblast radius
DiscordWorkableCommunity-only and bot-token shaped: capable, but you own the security review and the setup. No llms.txt anywhere on discord.com.
2.5
3
5
0.5
2.5
FreeUnmeteredCore writeNeeds a humanHighblast radius
Microsoft TeamsLimitedHardest auth story in this category. No dedicated first-party Teams MCP server confirmed — plan for Graph, Entra consent and an admin in the room.
2
2.5
2.5
1
2
EnterpriseUnmeteredShallow writeNeeds a humanMediumblast radius

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Setup

How we know

Last verified
2026-09-29 · 2d ago
Research confidence
high
Maturity
Generally available

GA 2026-02-17 alongside the Real-Time Search API.

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