Your app has Parallel watch the web for a query on a schedule and reads the new events it finds.
POST /v1/parallel/monitors on the gateway.curl https://api.routerplus.com/v1/parallel/monitors \
-H "Authorization: Bearer $TM_API_KEY" \
-H "Content-Type: application/json" \
-d '{"type": "event_stream", "frequency": "1d", "processor": "lite",
"settings": {"query": "New releases or security advisories of the PostgreSQL database"},
"spend_limit_usd": 2}'
The price is the provider's list price with no markup, charged to your RouterPlus balance as the page above says.