http://doc.wakanda.org/Using-JSON-RPC-Services/About-JSON-RPC-Services-in-Wakanda.300-306542.en.html

“Separate bulk storage of encrypted credit card information from the cardholder’s personally identifiable information not only complies with PCI DSS requirements, but renders the sensitive data useless to hackers. PaymentVault Tokenization provides safe and secure off-site data storage for tokenized credit card account numbers. Hosted in geographically distributed PCI Compliant hosting facilities, PaymentVault also provides transparent and automatic data replication. Data and the decryption/encryption keys are widely separated. PaymentVault is also developer friendly! Written by developers for developers. The JSON-RPC API and multiple leading language implementation samples make getting started easy and affordable.”

http://auricvault-api.readthedocs.org/en/latest/

http://dev.ripple.com/rippled-apis.html

https://packages.debian.org/testing/python-transmissionrpc