Prerequisites
The connector should already be set up, with a Connector Profile and a Linked Account. See Getting Started on the Cin7 Core connector page.How Cin7 Core webhooks are set up
StackOne registers the webhooks for you. When you enable an event, StackOne calls the Cin7 Core API to create a webhook of that type pointing at a StackOne receiver URL, and deletes it again when you disable the event or disconnect the account. You do not need to paste a URL into Cin7 Core.
Limits and delivery behaviour
Cin7 Core allows a maximum of five webhooks of the same type per account, so registration fails if that limit is already reached. Cin7 Core retries a failed delivery six times and then deactivates the webhook, which you can see in Integrations then API then Webhooks.