The disclosure herein describes handling tokenization requests associated with electronic transactions at a
payment network at a throttled
processing rate. Tokenization requests are received by tokenization
stream brokers from request sources. The tokenization requests include primary account numbers (PANs) to be tokenized. The tokenization requests are then consumed from the tokenization
stream brokers, at a request storage rate, for storage in a request
data store. Tokenization operations are then performed, at a request
processing rate, based on the tokenization requests stored in the request
data store. The tokenization operations include providing at least the primary account numbers to be tokenized to issuers associated with the tokenization requests at issuer tokenization rates associated with the issuers, whereby the request
processing rate is throttled for compatibility with capabilities of the
system and the issuers without unnecessary limitations placed on request sources.