Bitbucket Webhooks Skill

When to Use This Skill

• Setting up Bitbucket Cloud webhook handlers
• Debugging Bitbucket signature verification failures
• Understanding Bitbucket event keys and payloads
• Handling repo:push, pull request, or issue events

Verification (core)

Bitbucket signs the raw request body with HMAC-SHA256 keyed on your webhook secret and sends the digest in the X-Hub-Signature header formatted as sha256=<hex> (the prefix names the algorithm — currently sha256). Pass the raw body, and compare timing-safe. Webhooks configured without a secret are unsigned and send no X-Hub-Signature header.

Node:

const crypto = require('crypto');

function verify(rawBody, signatureHeader, secret) {
  const [algo, sig] = (signatureHeader || '').split('=');
  if (algo !== 'sha256' || !sig) return false;
  const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('hex');
  try {
    return crypto.timingSafeEqual(Buffer.from(sig), Buffer.from(expected));
  } catch {
    return false;
  }
}

Python:

import hmac, hashlib

def verify(raw_body: bytes, signature_header: str, secret: str) -> bool:
    algo, _, sig = (signature_header or "").partition("=")
    if algo != "sha256" or not sig:
        return False
    expected = hmac.new(secret.encode(), raw_body, hashlib.sha256).hexdigest()
    return hmac.compare_digest(sig, expected)

For complete handlers with route wiring, event dispatch, and tests, see:

• examples/express/
• examples/nextjs/
• examples/fastapi/

Common Event Types

For full event reference, see Bitbucket Event Payloads

Important Headers

Environment Variables

BITBUCKET_WEBHOOK_SECRET=your_webhook_secret   # Set when creating the webhook in Bitbucket

Local Development

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

Reference Materials

• references/overview.md - Bitbucket webhook concepts and events
• references/setup.md - Repository/workspace configuration guide
• references/verification.md - Signature verification details