# DocuSign Webhooks

## When to Use This Skill

* Setting up DocuSign Connect webhook handlers
* Debugging DocuSign HMAC signature verification failures
* Understanding DocuSign envelope and recipient event types and payloads
* Handling `envelope-completed`, `recipient-completed`, or other Connect events
* Verifying the `X-DocuSign-Signature-1` header

## Verification (core)

DocuSign Connect signs the raw request body with HMAC-SHA256 keyed on your Connect HMAC secret and sends the digest as base64 in `X-DocuSign-Signature-1`. When multiple HMAC keys are active it sends one header per key (`X-DocuSign-Signature-1`, `X-DocuSign-Signature-2`, … up to 100); only one needs to match. The `x-authorization-digest` header names the algorithm (`HMACSHA256`). This is not the Standard Webhooks spec. The event type lives in the JSON body's `event` field (e.g. `envelope-completed`), not in a header.

Node:

```javascript
const crypto = require('crypto');

// Collect every X-DocuSign-Signature-N header; any match = authentic.
function verify(rawBody, headers, secret) {
  const expected = crypto.createHmac('sha256', secret).update(rawBody).digest('base64');
  const signatures = Object.keys(headers)
    .filter((h) => h.toLowerCase().startsWith('x-docusign-signature-'))
    .map((h) => headers[h]);
  return signatures.some((sig) => {
    try {
      return crypto.timingSafeEqual(Buffer.from(sig), Buffer.from(expected));
    } catch {
      return false; // length mismatch = not a match
    }
  });
}

```

Python:

```python
import hmac, hashlib, base64

def verify(raw_body: bytes, headers, secret: str) -> bool:
    expected = base64.b64encode(
        hmac.new(secret.encode(), raw_body, hashlib.sha256).digest()
    ).decode()
    sigs = [v for k, v in headers.items() if k.lower().startswith("x-docusign-signature-")]
    return any(hmac.compare_digest(sig, expected) for sig in sigs)

```

> Important: Verify against the exact raw body bytes DocuSign sent. Any re-serialization (pretty-printing, JSON round-trip) changes the bytes and breaks the signature.

> For complete handlers with route wiring, event dispatch, and tests, see:
> 
> * [examples/express/](https://github.com/hookdeck/webhook-skills/tree/main/skills/docusign-webhooks/examples/express/)
> * [examples/nextjs/](https://github.com/hookdeck/webhook-skills/tree/main/skills/docusign-webhooks/examples/nextjs/)
> * [examples/fastapi/](https://github.com/hookdeck/webhook-skills/tree/main/skills/docusign-webhooks/examples/fastapi/)

## Common Event Types

DocuSign Connect events use a hyphenated `resource-action` format in the JSON `event` field:

| Event | Triggered When |
| --- | --- |
| `envelope-sent` | Envelope emailed to a recipient |
| `envelope-delivered` | Recipient opened the envelope |
| `envelope-completed` | All recipients completed (signed) |
| `envelope-declined` | A recipient declined to sign |
| `envelope-voided` | Sender voided the envelope |
| `recipient-sent` | Notification sent to a recipient |
| `recipient-delivered` | Recipient opened their documents |
| `recipient-completed` | Recipient finished their actions |
| `recipient-declined` | Recipient declined to sign |
| `recipient-authenticationfailed` | Recipient failed authentication |

> For the full event list, see [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/docusign-webhooks/references/overview.md) and the [Connect event triggers docs](https://developers.docusign.com/platform/webhooks/connect/event-triggers/).

## Environment Variables

```bash
DOCUSIGN_HMAC_SECRET=your_connect_hmac_secret   # From eSignature Admin > Connect > keys

```

## Local Development

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

```

Use the printed URL as the URL to publish to on your Connect configuration.

## Reference Materials

* [references/overview.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/docusign-webhooks/references/overview.md) - DocuSign Connect concepts and full event list
* [references/setup.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/docusign-webhooks/references/setup.md) - Configure Connect and get the HMAC secret
* [references/verification.md](https://github.com/hookdeck/webhook-skills/blob/main/skills/docusign-webhooks/references/verification.md) - Signature verification details and gotchas