What is the fees for taking DOI?
Fees for taking DOI is $68 USD and it is valid for 3 months from the date of payment or up-to 100 DOI numbers, whichever comes first. Maximum 5 requests can be submitted per day.
For Premium Membership of DOI, fees is $168.45 USD, which is valid for the period of 1 Yr. from the date of payment and there is no limit on DOI numbers and maximum 100 requests can be submitted per day.