Billeo, a startup that eases shopping and paying bills online, announced its Active eWallet API tool this morning:

“Once a credit, debit, prepaid or gift card issuer uses the API, the issuer’s card appears as an option in Billeo’s iPad and browser apps (ShopSmart, Offer Assistant and Bill Pay Assistant) allowing cardholders using any of Billeo’s free apps to easily add the card into their eWallet and use it while shopping or paying bills online.”

In addition, card issuers are able to use Billeo’s API to enhance their own apps and services to create. The API will allow issuers to connect to the 1.5 million Billeo users who pay online using Billeo’s iPad and browser apps.

To learn more about Billeo, watch its FinovateSpring 2011 demo.