Slack Webhook MCP Server

A Model Context Protocol (MCP) server that enables LLM applications like Claude Desktop to send messages to Slack channels via incoming webhooks.

Local serverstdioTypeScript

What is the Slack Webhook MCP Server?

A Model Context Protocol (MCP) server that enables LLM applications like Claude Desktop to send messages to Slack channels via incoming webhooks.

What the server does

  • Send plain text or markdown-formatted messages to Slack
  • Simple and secure webhook URL management
  • Built with Deno for modern TypeScript development
  • Full test coverage

Credentials and setup notes

  • Deno installed on your system - A Slack workspace with incoming webhooks enabled - Claude Desktop (or another MCP-compatible client)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
send_slack_message

How to install the Slack Webhook MCP Server

{
  "mcpServers": {
    "slack-webhook": {
      "command": "deno",
      "args": [
        "run",
        "--allow-net",
        "--allow-env",
        "--allow-read",
        "/path/to/slack-webhook-mcp/src/index.ts"
      ],
      "env": {
        "SLACK_WEBHOOK_URL": "https://hooks.slack.com/services/YOUR/WEBHOOK/URL"
      }
    }
  }
}

From the project documentation. Replace placeholders and example paths before connecting.

Configuration

  • Deno installed on your system - A Slack workspace with incoming webhooks enabled - Claude Desktop (or another MCP-compatible client)
VariableDescriptionRequired
SLACK_WEBHOOK_URLDeclared in the maintainer’s client configuration.Check documentation

Example prompts to try

  • “Use Slack Webhook MCP to Prerequisites.”
  • “Use Slack Webhook MCP to Setup.”
  • “Use Slack Webhook MCP to send slack message.”

Frequently asked questions

A Model Context Protocol (MCP) server that enables LLM applications like Claude Desktop to send messages to Slack channels via incoming webhooks. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.