Mobile payments developer Cellum is opening up its API to third-party developers for the first time in its 15-year history, offering them the opportunity to integrate the company's product into their mobile apps.

Cellum's "Plug and Pay" program makes available an SDK that is built on the same core engine powering the mobile wallets the company has produced for numerous banks and mobile network operators across the globe, according to a press release.

Plug and Pay includes Cellum's patented Split Secret card vault, which uses a proprietary method of tokenization and data fragmentation to store and access cardholder data. Featuring RSA and AES encryption and a PCI-DSS 3 audited backend, the system boasts a record of zero fraudulent transactions over deployments by partners on multiple continents, the company claimed in the announcement.

Meanwhile, the SDK comes bundled with payment processing by Cellum's partner Kalixa — allowing app owners to begin accepting payments without integration with a local processor — and will initially support transactions in six key currencies (EUR, USD, GBP, CHF, AUD, CAD).

Cellum said in the announcement the Plug and Pay package offers comprehensive, up-to-date documentation and technical support from Cellum's international team of developers and implementation experts.

"Plug and Pay is the logical culmination of our more than a decade developing specialized mobile payment solutions — a unique turnkey purchase and payment platform that gives app developers the freedom to focus on engaging customers and making sales," Cellum CEO János Kóka said. "And while it offers bank-grade security, complete integration can be executed within days." 

Access to Plug and Pay is currently limited to a select group of Cellum partners — including MyDo of Sweden and Hungary's CardNet — with the program rollout scheduled to be completed by the end of the second quarter of 2015. Developers interested in Plug and Pay can find more information at http://plugandpay.cellum.com.