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Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages
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Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages
Security Report
9.9
Low Risk9.9Low RiskValid MCP server (1 strong, 1 medium validity signals). 1 code issue detected. No known CVEs in dependencies. ⚠️ Package registry links to a different repository than scanned source. Imported from the Official MCP Registry. Trust signals: trusted author (36/38 approved). 2 finding(s) downgraded by scanner intelligence.
14 files analyzed · 2 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Path to the host-managed Slack config directory
Environment variable: SLACK_CONFIG_PATH
Slack workspace team ID (one process per workspace)
Environment variable: SLACK_TEAM_ID
Slack OAuth Connected App client ID. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.
Environment variable: SLACK_CLIENT_ID
Slack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.Required
Environment variable: SLACK_CLIENT_SECRET
Set to 1 to disable token refresh on this surface (cloud surface)
Environment variable: SLACK_DISABLE_REFRESH
Override the upstream timeout (max 300000ms = 5 min)
Environment variable: SLACK_REQUEST_TIMEOUT_MS
WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.
Environment variable: SLACK_MAX_RETRIES
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-mindstone-mcp-server-slack": {
"env": {
"SLACK_TEAM_ID": "your-slack-team-id-here",
"SLACK_CLIENT_ID": "your-slack-client-id-here",
"SLACK_CONFIG_PATH": "your-slack-config-path-here",
"SLACK_MAX_RETRIES": "your-slack-max-retries-here",
"SLACK_CLIENT_SECRET": "your-slack-client-secret-here",
"SLACK_DISABLE_REFRESH": "your-slack-disable-refresh-here",
"SLACK_REQUEST_TIMEOUT_MS": "your-slack-request-timeout-ms-here"
},
"args": [
"-y",
"@mindstone/mcp-server-slack"
],
"command": "npx"
}
}
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