Slack MCP Server

MIT License

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upload_file

Upload files directly to specified Slack channels. Provide file content, name, title, and an optional initial comment to share documents or updates efficiently.

Instructions

Upload a file to one or more Slack channels.

Args: channels: Comma-separated list of channel IDs content: File content as text filename: Name for the file title: Title of the file initial_comment: Initial comment for the file

Input Schema

Name	Required	Description	Default
`channels`	Yes
`content`	Yes
`filename`	Yes
`initial_comment`	No
`title`	No

Input Schema (JSON Schema)

{
  "properties": {
    "channels": {
      "title": "Channels",
      "type": "string"
    },
    "content": {
      "title": "Content",
      "type": "string"
    },
    "filename": {
      "title": "Filename",
      "type": "string"
    },
    "initial_comment": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Initial Comment"
    },
    "title": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "title": "Title"
    }
  },
  "required": [
    "channels",
    "content",
    "filename"
  ],
  "type": "object"
}

MCP directory API

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