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npx @modelcontextprotocol/inspector{
"mcpServers": {
"slack": {
"command": "npx",
"args": [
"-y",
"slack-mcp-server@latest",
"--transport",
"stdio"
],
"env": {
"SLACK_MCP_XOXC_TOKEN": "xoxc-...",
"SLACK_MCP_XOXD_TOKEN": "xoxd-..."
}
}
}
}conversations_historyRetrieves messages from a specified channel or DM.
Read-only operation; retrieves existing messages.
conversations_repliesRetrieves replies to a specific thread in a channel or DM.
Read-only operation; retrieves existing replies.
conversations_add_messageAdds a message to a specified channel or thread.
Adds content to Slack, but is disabled by default and can be restricted to specific channels.
conversations_search_messagesSearches messages within channels, DMs, and threads based on various filters.
Read-only operation; searches existing messages.
channels_listLists available channels based on specified types.
Read-only operation; lists available channels.
reactions_addAdds an emoji reaction to a message.
Adds a reaction to a message, but is disabled by default and can be restricted to specific channels.
reactions_removeRemoves an emoji reaction from a message.
Removes a reaction from a message, permission follows reactions_add.
users_searchSearches for users by name, email, or display name.
Read-only operation; searches user information.
usergroups_listLists all user groups in the workspace.
Read-only operation; lists user groups.
This server offers a balance of read and write capabilities. It's relatively safe in read-only or stealth mode. Enabling write operations like message posting increases the risk, especially without proper channel restrictions and input validation. Exercise caution when enabling write operations.