@sigmacomputing/slack-mcp-server

MCPattested
v0.1.1Sigma ComputingMITUpdated 7mo agonpmGitHub

MCP server for interacting with Slack

> Fork of zencoderai/slack-mcp-server — customized for read-only access to the Sigma Slack workspace. This is a Sigma-specific fork of the Zencoder Slack MCP server. It is tailored for reading and searching content in the Sigma Slack workspace from Cursor IDE, with no write access (no posting messages or replying to threads). The fork adds tools for file downloads, full-text search, pins,…

Works in
ClaudeCursorCopilotGemini

Inferred from the transports this listing declares (stdio). A client not listed here hasn’t been ruled out — it just isn’t something Forge can confirm.

Attested build
A verified provenance attestation binds this artifact to the listed repository. Nobody has claimed the listing yet — this proves where the code was built, not who stands behind it.
6kDownloads/wk
1Forks
7mo agoLast update
Package
AuthorSigma Computing
LicenseMIT
Version0.1.1
Sourcenpm
npm@sigmacomputing/slack-mcp-server
GitHubsigmacomputing/slack-mcp-server
SBOMCycloneDX 1.6 ↓
Trust Status
A
85/100Trusted
✓Listed in Forge index+10/10
✓Identity verified · attested build+20/20
—Ed25519 publish signature+0/5
→ Included automatically when the publisher runs `forge publish`
—Domain verification+0/5
→ Publisher: host /.well-known/forge.json on the package homepage with { "publisher": "<github-login>" }
✓npm Trusted Publishing (Sigstore)+5/5
—npm maintainer match+0/5
→ Publisher: add the verified GitHub login to the npm package's maintainers (npm owner add <login>)
✓CVE scan · clean+30/30
✓Static analysis · clean+20/20
Paste into Claude Code, Cursor, or any AI assistant to fix all gaps
StatusIdentity verified
PublisherUnverified
SignatureUnsigned
Domain—
Provenance✓ Sigstore-verified · f1a72eb
Dependencies60 resolved · 1 with advisories
Tool surface17 tools · 1 privileged
Security scan⚠ Warnings (3)v0.1.1 · 1mo agoHow well does this scan work?
HIGH@modelcontextprotocol/sdk@1.15.1@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuseHIGH@modelcontextprotocol/sdk@1.15.1Anthropic's MCP TypeScript SDK has a ReDoS vulnerabilityHIGH@modelcontextprotocol/sdk@1.15.1Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
EvalsNone
IndexedMay 24, 2026

Verification confirms publisher identity (repo ownership), not code safety. The security scan covers known CVEs and suspicious install scripts.

Tools

17 tools · 1 privileged
Statically extracted from the published packagev0.1.1 · 1mo ago

Read out of the source npm actually ships, at scan time. The package was never executed. Tools registered dynamically at runtime, or hidden inside bundled or minified code, can be missed — so this is a floor on the tool surface, not a complete census of it.

slack_list_channelsNo description published

This tool published no description. Forge does not invent one.

slack_post_messageNo description published

This tool published no description. Forge does not invent one.

slack_reply_to_threadNo description published

This tool published no description. Forge does not invent one.

slack_add_reactionNo description published

This tool published no description. Forge does not invent one.

slack_get_channel_historyNo description published

This tool published no description. Forge does not invent one.

slack_get_thread_repliesNo description published

This tool published no description. Forge does not invent one.

slack_get_usersNo description published

This tool published no description. Forge does not invent one.

slack_get_user_profileNo description published

This tool published no description. Forge does not invent one.

slack_download_fileNo description published

This tool published no description. Forge does not invent one.

slack_list_filesNo description published

This tool published no description. Forge does not invent one.

slack_join_channelNo description published

This tool published no description. Forge does not invent one.

slack_get_reactionsNo description published

This tool published no description. Forge does not invent one.

slack_remove_reactionprivilegedNo description published

This tool published no description. Forge does not invent one.

slack_list_pinsNo description published

This tool published no description. Forge does not invent one.

slack_list_bookmarksNo description published

This tool published no description. Forge does not invent one.

slack_search_messagesNo description published

This tool published no description. Forge does not invent one.

slack_search_filesNo description published

This tool published no description. Forge does not invent one.

0 of 17 tools published a description.

Tool names and descriptions are written by the publisher and shown verbatim as inert text. They are the strings an MCP client passes to a model, so Forge scans them for prompt-injection patterns — any finding appears with the security scan above. “Privileged” is a keyword match on the tool name, not an audit of what the tool does: a benign-sounding name can still do anything.

About

> Fork of zencoderai/slack-mcp-server — customized for read-only access to the Sigma Slack workspace. This is a Sigma-specific fork of the Zencoder Slack MCP server. It is tailored for reading and searching content in the Sigma Slack workspace from Cursor IDE, with no write access (no posting messages or replying to threads). The fork adds tools for file downloads, full-text search, pins, bookmarks, and reactions that the upstream project does not provide. This project includes code originally

Alternatives
Comparing tool surfaces…

Tools exposed

17 tools · 1 privileged · observed by static extraction. A tool surface is what one scan read on one day, not a live capability list.

Linked names open Forge’s index of every entry observed exposing that tool. Browse all indexed tools.

No dependency coverage

This package was last scanned before Forge began storing the resolved tree. The next scan will record it.

Topics

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