Accepts an array of 1ā20 National Producer Numbers and returns NIPR data for each, indicating whether the NPN belongs to a firm (agency), individual (agent), or is not found.Duplicate NPNs in the request body are deduplicated before lookup. Results are returned for the unique set of NPNs only.Only one request per account can be in progress at a time. If you send a second request while the first is still processing, you will receive a 429 Too Many Requests error.