Read and write Slack with session tokens — no OAuth, no bot, no admin approval.
Connect Runs on your machine
claude mcp add slack-mcp -e SLACK_MCP_XOXC_TOKEN=<SLACK_MCP_XOXC_TOKEN> -e SLACK_MCP_XOXD_TOKEN=<SLACK_MCP_XOXD_TOKEN> -- npx -y @aaronsb/[email protected]{
"mcpServers": {
"slack-mcp": {
"command": "npx",
"args": [
"-y",
"@aaronsb/[email protected]"
],
"env": {
"SLACK_MCP_XOXC_TOKEN": "<SLACK_MCP_XOXC_TOKEN>",
"SLACK_MCP_XOXD_TOKEN": "<SLACK_MCP_XOXD_TOKEN>"
}
}
}
}{
"mcpServers": {
"slack-mcp": {
"command": "npx",
"args": [
"-y",
"@aaronsb/[email protected]"
],
"env": {
"SLACK_MCP_XOXC_TOKEN": "<SLACK_MCP_XOXC_TOKEN>",
"SLACK_MCP_XOXD_TOKEN": "<SLACK_MCP_XOXD_TOKEN>"
}
}
}
}{
"servers": {
"slack-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@aaronsb/[email protected]"
],
"env": {
"SLACK_MCP_XOXC_TOKEN": "<SLACK_MCP_XOXC_TOKEN>",
"SLACK_MCP_XOXD_TOKEN": "<SLACK_MCP_XOXD_TOKEN>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
SLACK_MCP_XOXC_TOKENOptional | Slack session token. Optional — the auth tool extracts it from your browser and stores it in the config file. |
SLACK_MCP_XOXD_TOKENOptional | Slack session cookie. Optional — the auth tool extracts it from your browser and stores it in the config file. |
Details
| Package | @aaronsb/[email protected] (NPM, stdio) |
| First published | 21 Oct 2026 |
| Last updated | 21 Oct 2026 |
| Registry name | io.github.aaronsb/slack-mcp |
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