# Bitbucket Webhooks

## 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:

```javascript
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:

```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/](https://github.com/hookdeck/webhook-skills/tree/main/skills/bitbucket-webhooks/examples/express/)
> * [examples/nextjs/](https://github.com/hookdeck/webhook-skills/tree/main/skills/bitbucket-webhooks/examples/nextjs/)
> * [examples/fastapi/](https://github.com/hookdeck/webhook-skills/tree/main/skills/bitbucket-webhooks/examples/fastapi/)

## Common Event Types

| Event Key | Description |
| --- | --- |
| `repo:push` | Commits pushed to a branch or tag |
| `pullrequest:created` | Pull request opened |
| `pullrequest:updated` | Pull request title/description/commits updated |
| `pullrequest:approved` | Pull request approved by a reviewer |
| `pullrequest:fulfilled` | Pull request merged |
| `pullrequest:rejected` | Pull request declined |
| `pullrequest:comment_created` | Comment added to a pull request |
| `issue:created` | Issue created |

> For full event reference, see [Bitbucket Event Payloads](https://support.atlassian.com/bitbucket-cloud/docs/event-payloads/)

## Important Headers

| Header | Description |
| --- | --- |
| `X-Hub-Signature` | HMAC SHA-256 signature as `sha256=<hex>` (only when a secret is set) |
| `X-Event-Key` | Event type (e.g. `repo:push`, `pullrequest:created`) |
| `X-Request-UUID` | Unique delivery ID |
| `X-Attempt-Number` | Retry attempt number for this delivery |

## Environment Variables

```bash
BITBUCKET_WEBHOOK_SECRET=your_webhook_secret   # Set when creating the webhook in Bitbucket

```

## Local Development

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

```

## Reference Materials

* [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/bitbucket-webhooks/references/overview.md) - Bitbucket webhook concepts and events
* [references/setup.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/bitbucket-webhooks/references/setup.md) - Repository/workspace configuration guide
* [references/verification.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/bitbucket-webhooks/references/verification.md) - Signature verification details