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npm

slack-mcp-server

Model Context Protocol (MCP) server for Slack Workspaces. This integration supports both Stdio and SSE transports, proxy settings and does not require any permissions or bots being created or approved by Workspace admins

→ korotovsky/slack-mcp-server· npm: slack-mcp-server· listed on npm
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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 4 credentials: SLACK_MCP_XOXB_TOKEN, SLACK_MCP_XOXC_TOKEN, SLACK_MCP_XOXD_TOKEN, SLACK_MCP_XOXP_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// required environment variables
This server reads these from process.env. You'll be asked to provide them before it can run.
configSLACK_MCP_ADD_MESSAGE_TOOL
configSLACK_MCP_DXT
🔐 secretSLACK_MCP_XOXB_TOKEN— Yes nil Bot token (xoxb-...) — alternative to xoxp/xoxc/xoxd. Bot has limited access (invited channels only, no search)
🔐 secretSLACK_MCP_XOXC_TOKEN— Yes nil Slack browser token (xoxc-...)
🔐 secretSLACK_MCP_XOXD_TOKEN— Yes nil Slack browser cookie d (xoxd-...)
🔐 secretSLACK_MCP_XOXP_TOKEN— Yes nil User OAuth token (xoxp-...) — alternative to xoxc/xoxd
// full audit trail
The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.
// improvement guidance — verified publishers only
We have 2 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/npm-https-github-com-korotovsky-slack-mcp-server)](https://m8ven.ai/mcp/npm-https-github-com-korotovsky-slack-mcp-server)
commit: b88c0de3f706f4f07337c9eda7133c736d1c9524
code hash: b558ae2da1bf8a2fa36422dc39a7615810abcae13c33641b72aef65d995ce6b7
verified: 6/14/2026, 11:10:15 AM
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