Retrieve a job

Retrieve a background job by id to follow its progress. An operation that touches more contacts than fits in one request (for example Delete a custom contact field or Rename a custom field's key above 5,000 holders, or a campaign validation over more than 5,000 recipients) answers 202 with a job. Poll this until status is COMPLETED, FAILED or CANCELED; processed of total is the progress. A failed job keeps the work it finished; retry it from the dashboard (Settings → Jobs). Reading a job takes the read capability of the resource it changes (contacts:read for a custom-field job, campaigns:read for a campaign check). Requires the contacts:read capability.