Slack

io.github.mindstone/mcp-server-slack·v0.1.3·Chat & Messaging

Quality Score

/100

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

Repository →

§00 Trust verdict · v1 advisory · method

UNVERIFIEDno verdict on file

Verdict not yet evaluated for this tool. The hybrid eval runs adversarial cases first; coverage rolls out as the corpus expands. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: hybrid eval, four-state verdict, honest limits.

§01 Install

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<slack_config_path>",
        "SLACK_TEAM_ID": "<slack_team_id>",
        "SLACK_CLIENT_ID": "<slack_client_id>",
        "SLACK_CLIENT_SECRET": "<your-slack_client_secret>",
        "SLACK_DISABLE_REFRESH": "<slack_disable_refresh>",
        "SLACK_REQUEST_TIMEOUT_MS": "60000",
        "SLACK_MAX_RETRIES": "10"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<slack_config_path>",
        "SLACK_TEAM_ID": "<slack_team_id>",
        "SLACK_CLIENT_ID": "<slack_client_id>",
        "SLACK_CLIENT_SECRET": "<your-slack_client_secret>",
        "SLACK_DISABLE_REFRESH": "<slack_disable_refresh>",
        "SLACK_REQUEST_TIMEOUT_MS": "60000",
        "SLACK_MAX_RETRIES": "10"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y @mindstone/mcp-server-slack

§02 Environment variables

SLACK_CONFIG_PATH

required

Path to the host-managed Slack config directory

SLACK_TEAM_ID

required

Slack workspace team ID (one process per workspace)

SLACK_CLIENT_ID

required

Slack OAuth Connected App client ID

SLACK_CLIENT_SECRET

requiredsecret

Slack OAuth Connected App client secret

SLACK_DISABLE_REFRESH

Set to 1 to disable token refresh on this surface (cloud surface)

SLACK_REQUEST_TIMEOUT_MS

Override the upstream timeout (max 300000ms = 5 min)

SLACK_MAX_RETRIES

WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.

§03 MCP Quality Score · methodology

freshness

completeness

installability

documentation

stability

§04 Alternatives in Chat & Messaging

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