The most powerful MCP Slack Server with no permission requirements, Apps support, GovSlack, DMs, Group DMs and smart history fetch logic.
{
"mcpServers": {
"slack-mcp-server": {
"args": [
"-y",
"@modelcontextprotocol/inspector"
],
"command": "npx"
}
}
}The most powerful MCP Slack Server with no permission requirements, Apps support, GovSlack, DMs, Group DMs and smart history fetch logic.
Is it safe?
No package registry to scan.
No authentication — any process on your machine can connect.
MIT. View license →
Is it maintained?
Last commit 8 days ago. 1,504 stars.
Will it work with my client?
Transport: stdio, sse, http. Works with Claude Desktop, Cursor, Claude Code, and most MCP clients.
Context cost
4 tools. ~1,400 tokens (0.7% of 200K).
No automated test available for this server. Check the GitHub README for setup instructions.
conversations_historyGet messages from the channel (or DM) by channel_id, the last row/column in the response is used as 'cursor' parameter for pagination if not empty
conversations_repliesGet a thread of messages posted to a conversation by channelID and thread_ts, the last row/column in the response is used as cursor parameter for pagination if not empty
conversations_add_messageAdd a message to a public channel, private channel, or direct message (DM, or IM) conversation by channel_id and thread_ts. Disabled by default for safety.
conversations_search_messagesSearch messages in a public channel, private channel, or direct message (DM, or IM) conversation using filters. Not available with bot tokens (xoxb-*)
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Add informationLast scanned 3h ago
No known vulnerabilities.
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