hookdeck/webhook-skills/discord-webhooks

const express = require('express');
const { verifyKey } = require('discord-interactions');
const app = express();
// CRITICAL: Use express.raw() - verification needs raw body bytes
// Note: discord-interactions v4 returns a Promise from verifyKey — await it.
app.post('/webhooks/discord',
  express.raw({ type: 'application/json' }),
  async (req, res) => {
    const signature = req.headers['x-signature-ed25519'];
    const timestamp = req.headers['x-signature-timestamp'];
    const publicKey = process.env.DISCORD_PUBLIC_KEY;
    if (!signature || !timestamp) {
      return res.status(401).send('Missing signature headers');
    }
    const isValid = await verifyKey(req.body, signature, timestamp, publicKey);
    if (!isValid) {
      return res.status(401).send('Invalid request signature');
    }
    const payload = JSON.parse(req.body.toString());
    // type: 0 = PING (endpoint validation). Reply 204 empty body.
    if (payload.type === 0) {
      return res.status(204).send();
    }
    // type: 1 = event payload
    if (payload.type === 1) {
      const event = payload.event;
      switch (event.type) {
        case 'APPLICATION_AUTHORIZED':
          console.log('App authorized for user:', event.data.user?.id);
          break;
        case 'APPLICATION_DEAUTHORIZED':
          console.log('App deauthorized for user:', event.data.user?.id);
          break;
        case 'ENTITLEMENT_CREATE':
          console.log('Entitlement created:', event.data.id);
          break;
        case 'LOBBY_MESSAGE_CREATE':
          console.log('Lobby message:', event.data.content);
          break;
        case 'GAME_DIRECT_MESSAGE_CREATE':
          console.log('Game DM:', event.data.content);
          break;
        default:
          console.log('Unhandled event type:', event.type);
      }
    }
    res.status(204).send();
  }
);

import os
import json
from fastapi import FastAPI, Request, Response, HTTPException
from nacl.signing import VerifyKey
from nacl.exceptions import BadSignatureError
app = FastAPI()
PUBLIC_KEY = os.environ["DISCORD_PUBLIC_KEY"]
def verify_discord_signature(body: bytes, signature: str, timestamp: str, public_key: str) -> bool:
    try:
        verify_key = VerifyKey(bytes.fromhex(public_key))
        verify_key.verify(timestamp.encode() + body, bytes.fromhex(signature))
        return True
    except (BadSignatureError, ValueError):
        return False
@app.post("/webhooks/discord")
async def discord_webhook(request: Request):
    signature = request.headers.get("x-signature-ed25519")
    timestamp = request.headers.get("x-signature-timestamp")
    if not signature or not timestamp:
        raise HTTPException(status_code=401, detail="Missing signature headers")
    body = await request.body()
    if not verify_discord_signature(body, signature, timestamp, PUBLIC_KEY):
        raise HTTPException(status_code=401, detail="Invalid request signature")
    payload = json.loads(body)
    # type 0 = PING endpoint validation
    if payload.get("type") == 0:
        return Response(status_code=204)
    # type 1 = event
    if payload.get("type") == 1:
        event = payload.get("event", {})
        event_type = event.get("type")
        # Handle event_type: APPLICATION_AUTHORIZED, ENTITLEMENT_CREATE, etc.
        print(f"Received Discord event: {event_type}")
    return Response(status_code=204)

{
  "version": 1,
  "application_id": "123456789012345678",
  "type": 1,
  "event": {
    "type": "APPLICATION_AUTHORIZED",
    "timestamp": "2024-10-18T14:42:32.000Z",
    "data": { /* event-specific fields */ }
  }
}

# Application Public Key (hex) from Discord Developer Portal → General Information
DISCORD_PUBLIC_KEY=abc123def456...

# Start tunnel (no account needed)
npx hookdeck-cli listen 3000 discord --path /webhooks/discord

// Generated with: discord-webhooks skill
// https://github.com/hookdeck/webhook-skills