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GibSend/packages/python-sdk/example/webhook-test-project/README.md
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KM Koushik 09bdb8aaad feat(python-sdk): add webhook verification and event handling (#344)
* feat(python-sdk): add webhook verification and event handling

Add webhook support to the Python SDK matching the JS SDK implementation:
- Add Webhooks class with verify() and construct_event() methods
- Implement HMAC-SHA256 signature verification with timing-safe comparison
- Add timestamp validation with configurable tolerance (default 5 minutes)
- Add comprehensive webhook event types (18 events: email, contact, domain, test)
- Add WebhookVerificationError with typed error codes
- Export webhook constants (headers) and types

* fix(python-sdk): harden webhook parsing and typing

Normalize invalid UTF-8 webhook payloads to INVALID_BODY errors so verify() safely returns false, and narrow base email webhook event types to avoid discriminated-union overlap. Add regression tests for both paths.

* chore(python-sdk): bump package version to 0.2.9

* feat(python-sdk): add local webhook test example project

Add a runnable Flask receiver and signed webhook sender under packages/python-sdk/example, and link it from the Python SDK README for local verification.

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-02-08 08:18:14 +11:00

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# Webhook Test Project (Flask)
This example project helps you validate Python SDK webhook signature verification locally.
## What it includes
- `receiver.py`: local webhook endpoint that verifies and parses events
- `send_test_webhook.py`: sends a signed test webhook request to your local endpoint
## Setup
```bash
cd packages/python-sdk/example/webhook-test-project
python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
```
## Run
Terminal 1:
```bash
python receiver.py
```
Terminal 2:
```bash
python send_test_webhook.py
```
You should see:
- `200` response from the receiver
- parsed webhook event output in the receiver terminal
## Environment variables
- `USESEND_WEBHOOK_SECRET` (default: `whsec_test`)
- `WEBHOOK_URL` (default: `http://127.0.0.1:8000/webhook`)
Use the same `USESEND_WEBHOOK_SECRET` for both scripts.