Billing is based on the number of API requests in correspondence with your use cases (if applicable). Retrieving encrypted device details via our SDK or JavaScript Agent (in base64 format) is free. However, decrypting these details using the session parameter in a Fraud API request incurs a charge as part of your API call count for the billing period. Running the device fingerprinting module alongside other Fraud API features (such as Email, IP, Phone or AML checks) comes at no additional cost.