Update contact fields during a live campaign via API or webhook

Update a contact's field values while they are enrolled in a running campaign, via the API or an inbound webhook, and have the sequence react to the new values. For example: write a custom message received by webhook into a "message1" field and use it as a variable in a later text step, or update a status field so a Condition node sends the contact down a different path.

Why it helps: Campaigns can respond to real-time changes in an external CRM. Example flow: a contact's details change in HubSpot, a new status is written to the contact's field in Sendr, and the campaign treats that contact differently further down the sequence via a Condition node.