Slack

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "io.github.mindstone/mcp-server-slack",
  "description": "Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages",
  "title": "Slack",
  "repository": {
    "url": "https://github.com/mindstone/mcp-servers",
    "source": "github",
    "subfolder": "connectors/slack"
  },
  "version": "0.3.0",
  "packages": [
    {
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "identifier": "@mindstone/mcp-server-slack",
      "version": "0.3.0",
      "runtimeHint": "npx",
      "transport": {
        "type": "stdio"
      },
      "environmentVariables": [
        {
          "description": "Path to the host-managed Slack config directory",
          "isRequired": true,
          "format": "filepath",
          "name": "SLACK_CONFIG_PATH"
        },
        {
          "description": "Slack workspace team ID (one process per workspace)",
          "isRequired": true,
          "format": "string",
          "name": "SLACK_TEAM_ID"
        },
        {
          "description": "Slack OAuth Connected App client ID. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.",
          "format": "string",
          "name": "SLACK_CLIENT_ID"
        },
        {
          "description": "Slack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.",
          "format": "string",
          "isSecret": true,
          "name": "SLACK_CLIENT_SECRET"
        },
        {
          "description": "Set to 1 to disable token refresh on this surface (cloud surface)",
          "format": "string",
          "name": "SLACK_DISABLE_REFRESH"
        },
        {
          "description": "Override the upstream timeout (max 300000ms = 5 min)",
          "format": "number",
          "default": "60000",
          "name": "SLACK_REQUEST_TIMEOUT_MS"
        },
        {
          "description": "WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.",
          "format": "number",
          "default": "10",
          "name": "SLACK_MAX_RETRIES"
        },
        {
          "description": "Workspace directory upload_slack_file reads are constrained to (defaults to the system temp dir when unset)",
          "format": "filepath",
          "name": "MCP_WORKSPACE_PATH"
        }
      ]
    }
  ],
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "com.mindstone.rebel": {
        "catalogId": "bundled-slack",
        "provider": "rebel-oss"
      }
    }
  }
}