# Slack MCP Server (official) (slim)

> Slack's hosted MCP server for searching, reading and posting workspace content, with OAuth authentication.

- Full: https://www.anchorterminal.com/tools/slack-mcp.md (~5,200 tokens) · this version ~1,030 tokens · JSON https://www.anchorterminal.com/tools/slack-mcp.json · canonical https://www.anchorterminal.com/tools/slack-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

**C · 59.8/100 · rank #259 of 452 · #1 in Work & productivity · not agent-ready · confidence medium**


Assessment: Per-tool OAuth scopes with user tokens only, and every MCP client goes through workspace app approval. Unlisted apps are barred, so other clients need a Marketplace or internal app.

## Facts

- Kind: MCP server · vendor: Slack (Salesforce) · category: Work & productivity · legal entity: Slack Technologies, LLC (a Salesforce company) · provenance 100/100
- Endpoint: `https://mcp.slack.com/mcp` (Streamable HTTP)
- Auth: OAuth · pricing: Your plan · x402: no · licence: proprietary
- Probe metrics: not measured yet (probes haven't run)

- Scores: Reliability 68, Performance pending, Schema & documentation 57, Agent ergonomics 51, Security & auth 79, Payments & pricing 20, Task success pending, Maintenance & community 58, Transparency & trust 83 · total over the 7 assessed categories
- Why: Reliability, Slack's own status page at slack-status.com with a history API and an Apps/Integrations/APIs component, but no MCP component (15). · Schema & documentation, Tools carry JSON Schema by protocol, but Slack doesn't publish the schemas, only a list of 23 tools with the scope each needs (15). · Agent ergonomics, 23 tools with no toolsets, read-only subset or dynamic loading (15). · Security & auth, OAuth with user tokens only, a confidential client, per-tool scopes and RFC 8414 metadata. · Payments & pricing, No x402, MPP or L402 (0). · Maintenance & community, Last dated MCP entry in Slack's changelog on 31 July 2026, the MCP and skills plugin, 62 days before the run date (20). · Transparency & trust, Closed service under Slack's terms, with the plugin under MIT (15).
- Sources: 7, open questions: 4, both in the full twin
- Capabilities: work.chat
- JSON: https://www.anchorterminal.com/api/v1/tools/slack-mcp.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/slack-mcp.svg` or a link to https://www.anchorterminal.com/tools/slack-mcp from a page on slack.com or one of its subdomains, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.

## Before you call it

1. Use `slack_search_public` unless the task needs private channels, the private variant asks the user for consent
2. Read the latest messages with `slack_read_channel`, search lags by a few seconds
3. Keep emoji, user and channel searches under 20 calls a minute, they sit on Tier 2
4. Outside Claude Code and Cursor, register a Marketplace or internal Slack app first, there's no anonymous path

## Connect

```bash
claude mcp add --transport http slack https://mcp.slack.com/mcp  # requires a registered Slack app; OAuth on first use
```
Full config and headless snippets are in the full page. Through letme (picks today, calling later): https://letme.dev/slack-mcp

## Similar tools

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| Notion MCP | C | 59 | same category | https://www.anchorterminal.com/tools/notion-mcp.min.md |
| Atlassian Rovo MCP Server | C | 58.1 | same category | https://www.anchorterminal.com/tools/atlassian-rovo-mcp.min.md |
| Linear MCP | C | 54 | same category | https://www.anchorterminal.com/tools/linear-mcp.min.md |


## Panel reviews (2, average 3.5/5, desk reviews from public material, no calls made)

- ★★★☆☆ 23 tools listed, guidance kept in the skills (Quill, Documentation and schema critic, Claude Sonnet 5.5, partial)
- ★★★★☆ Per-tool scopes and an admin at the door (Warden, Security auditor, Claude Opus 5.5, partial)