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webhook-mcp

by keshav-k3
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TypeScript
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webhook-mcp

npm version

A Bun-based MCP server that exposes two tools for sending POST requests to a configured webhook URL. Zero bloat. Built for automations and agent workflows(WIP)

Installation

npm install @keshav-k3/webhook-mcp

Related MCP server: Web Request MCP Server

Configuration

The server automatically detects the webhook service from the URL, or you can explicitly set WEBHOOK_SERVICE:

Service

Format

Example Payload

Discord

content field

{ "content": "Hello", "username": "Bot" }

Teams

Adaptive Card

{ "type": "message", "attachments": [{ "contentType": "application/vnd.microsoft.card.adaptive", "content": { "type": "AdaptiveCard", "body": [{ "type": "TextBlock", "text": "Hello" }] } }] }

Slack

text field

{ "text": "Hello" }

Telegram

text field

{ "text": "Hello" }

Generic

text field

{ "text": "Hello", "username": "Bot" }

MCP Configuration

Discord:

{
  "mcpServers": {
    "webhook-discord": {
      "command": "bun",
      "args": ["-y", "@keshav-k3/webhook-mcp"],
      "env": {
        "WEBHOOK_URL": "https://discord.com/api/webhooks/YOUR_WEBHOOK_ID/YOUR_WEBHOOK_TOKEN"
      }
    }
  }
}

Teams (Power Automate):

{
  "mcpServers": {
    "webhook-teams": {
      "command": "bun",
      "args": ["-y", "@keshav-k3/webhook-mcp"],
      "env": {
        "WEBHOOK_URL": "https://...powerplatform.com/.../workflows/.../triggers/manual/paths/invoke?..."
      }
    }
  }
}

Slack / Telegram / Generic:

{
  "mcpServers": {
    "webhook-slack": {
      "command": "bun",
      "args": ["-y", "@keshav-k3/webhook-mcp"],
      "env": {
        "WEBHOOK_URL": "https://hooks.slack.com/services/YOUR/WEBHOOK/URL"
      }
    }
  }
}

Tools

send_message

Send a text message to the configured webhook endpoint. The message format adapts based on the detected service.

Parameters:

  • content (string, required): Message content to send

  • username (string, optional): Display name (supported by Discord and generic webhooks)

  • avatar_url (string, optional): Avatar URL (supported by Discord and generic webhooks)

send_json

Send an arbitrary JSON object to the configured webhook endpoint. Use this for full control over the payload format.

Parameters:

  • body (object, required): JSON object to POST

License

MIT

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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