Webhooks are how Mercura tells your system that something happened without you having to poll. Instead of asking GET /jobs/{job_id} every few seconds, you register an HTTPS endpoint once and Mercura delivers a signed POST whenever a relevant event fires.

For the end-to-end sequence — how a completed tender flows from Mercura into your ERP via a webhook, and the polling alternative — see Getting Started → Integration patterns: webhook vs polling.