MCP Discord Webhook

A Model Context Protocol (MCP) server that provides tools to send messages and embeds to Discord webhooks.

Features

• Send simple text messages to Discord webhooks
• Send rich embeds to Discord webhooks with customizable content
• Auto-format content into Discord embeds using OpenAI
• Supports both stdio and HTTP transport modes

Installation

npm install @lmquang/mcp-discord-webhook

Usage

As a CLI Tool

# Install globally
npm install -g @lmquang/mcp-discord-webhook

# Run the CLI
mcp-discord-webhook

Using npx (without installation)

# Run directly with npx
npx -y @lmquang/mcp-discord-webhook

Environment Variables

When using the autoFormat feature, you need to set your OpenAI API key:

export OPENAI_API_KEY=your_openai_api_key

As a Library

import { createDiscordMcpServerInstance } from '@lmquang/mcp-discord-webhook';
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";

async function runServer() {
  const server = createDiscordMcpServerInstance(
    "MyDiscordWebhookService",
    "1.0.0"
  );

  const transport = new StdioServerTransport();
  await server.connect(transport);
}

runServer().catch(console.error);

HTTP Server Mode

import { startHttpServer } from '@lmquang/mcp-discord-webhook/server';

// Start the HTTP server
startHttpServer().catch(console.error);

Available Tools

discord-send-message

Sends a simple text message to a Discord webhook.

Parameters:

• webhookUrl (string, required): The Discord webhook URL
• content (string, required): The message content
• username (string, optional): Override the webhook's default username
• avatarUrl (string, optional): Override the webhook's default avatar

discord-send-embed

Sends a message with one or more embeds to a Discord webhook.

Parameters:

• webhookUrl (string, required): The Discord webhook URL
• embeds (array, required): Array of embed objects
• content (string, optional): Optional text content
• username (string, optional): Override the webhook's default username
• avatarUrl (string, optional): Override the webhook's default avatar
• autoFormat (boolean, optional): When set to true, uses OpenAI to automatically format the content into a Discord embed
• autoFormatPrompt (string, optional): Custom system prompt for the OpenAI formatting (only used when autoFormat is true)

Auto-Formatting with OpenAI

When the autoFormat parameter is set to true, the tool will use OpenAI's API to convert your content into a well-structured Discord embed. This is particularly useful when you want to quickly format plain text or unstructured content into an attractive Discord embed.

The auto-formatting feature includes Zod schema validation to ensure that the generated embeds conform to Discord's requirements. If the AI generates an invalid embed format, the tool will automatically fall back to a simple embed containing the original content.

Note: When autoFormat is enabled, the content is only used to generate the embed and is not included separately in the Discord message. This prevents duplicate content from appearing in your Discord messages.

Example:

{
  "webhookUrl": "https://discord.com/api/webhooks/your_webhook_url",
  "content": "Project Status Update: We've completed the backend API and are now working on the frontend. Current progress is at 65%. Next milestone is scheduled for Friday.",
  "embeds": [], // Can be empty when using autoFormat
  "autoFormat": true
}

You can also customize the formatting by providing a custom system prompt:

{
  "webhookUrl": "https://discord.com/api/webhooks/your_webhook_url",
  "content": "Project Status Update: We've completed the backend API and are now working on the frontend. Current progress is at 65%. Next milestone is scheduled for Friday.",
  "embeds": [],
  "autoFormat": true,
  "autoFormatPrompt": "Format this as a project status report with color-coded sections based on urgency. Use red for critical items, yellow for warnings, and green for completed items."
}

Note: Using the autoFormat feature requires an OpenAI API key set as the OPENAI_API_KEY environment variable.

Development

# Clone the repository
git clone https://github.com/lmquang/mcp-discord-webhook.git
cd mcp-discord-webhook

# Install dependencies
npm install

# Build the project
npm run build

# Run in development mode
npm start

Publishing

This package uses GitHub Actions to automatically publish to npm when a new version tag is pushed.

To publish a new version:

Option 1: Using npm scripts (recommended)

We provide npm scripts that handle versioning and publishing:

# For bug fixes (1.0.0 -> 1.0.1)
npm run publish:patch

# For new features (1.0.0 -> 1.1.0)
npm run publish:minor

# For breaking changes (1.0.0 -> 2.0.0)
npm run publish:major

Option 2: Using the helper script directly

You can also run the helper script directly:

./scripts/publish.sh patch  # or minor/major

The script will:

1. Check for uncommitted changes
2. Update the version in package.json
3. Create a git tag
4. Push changes and tags
5. Trigger the GitHub Action workflow

Option 3: Manual process

1. Update the version in package.json:

   npm version patch  # for bug fixes (1.0.0 -> 1.0.1)
   npm version minor  # for new features (1.0.0 -> 1.1.0)
   npm version major  # for breaking changes (1.0.0 -> 2.0.0)

   Note: The npm version command will automatically create a git tag for you.

2. Push the changes and the new tag:

   git push && git push --tags

3. The GitHub Action will automatically:

   • Check if the version already exists on npm
   • Build the project
   • Publish to npm if the version is new

Version naming convention

Follow semantic versioning (SemVer) principles:

• MAJOR version for incompatible API changes
• MINOR version for adding functionality in a backward compatible manner
• PATCH version for backward compatible bug fixes

Setting up npm authentication

To enable the GitHub Action to publish to npm, you need to add your npm token as a repository secret:

1. Generate an npm access token from your npm account settings
2. Go to your GitHub repository settings > Secrets > Actions
3. Add a new repository secret named NPM_TOKEN with your npm access token as the value

License

MIT