Preview a Live Data search

<Warning> **Coming soon.** This endpoint will be available by early July 2026. </Warning>

<small>Requires the contacts:write scope (or a broader one that includes it).</small>

Starts a Live Data preview for the given filters and returns a background job to poll. The job is tracked by GET /v3/background-jobs/{id}; on completion its jsonDataResult carries { contactsCount, companiesCount, sampleContacts }, where sampleContacts is a capped sample of matching contacts. A preview adds no prospects and consumes no credits.