Create CourtListener docket alerts and receive new-filing webhook notifications

Steps

1. Obtain a CourtListener API token by registering at courtlistener.com and retrieving your token from the account settings page
2. Create a docket alert with POST /api/rest/v4/docket-alerts/ passing the docket URL or docket ID and your preferred alert_type (RT for real-time); include the Authorization: Token {token} header
3. Register a webhook endpoint in your CourtListener account; webhooks are configured in the account settings and receive POST events whenever a docket covered by your alerts is updated
4. Parse the incoming webhook payload; the event object contains a webhook key (with the event_type such as DOCKET_ALERT) and a payload key with a results array of new docket entries including description, date_filed, and document download URLs
5. Use the document URLs in the payload to download newly filed PDFs; if the document is not yet in RECAP (free), use the Fetch API to instruct CourtListener to retrieve it from PACER on your behalf using your PACER credentials