Bulk lookup (up to 100)

Full register profiles for up to 100 company numbers in one call (Business plan and above). Each company number in a bulk request counts as one request against your per-minute and daily limits, so a batch of 50 uses 50. A number repeated in the batch, or written with and without its leading zeros, counts once. A batch that is more than you have left of the minute or the day is refused with 429 and counts nothing; the body says how many numbers you sent (requested) and how many would fit (fits). A request the API rejects as invalid (more than 100 numbers, a malformed number) counts as one request. X-RateLimit-Cost on the response is the number of requests the batch counted, and the usual X-RateLimit-* headers show what is left.