If a website requires the ability to verify that a user has a valid credit card without making a purchase, than this is the tool to use. Forward visitors to Confirm18.com to verify the authenticity of a credit card, accepting the following inputs: it's first six digits, the name of the affiliated bank, and the type of card. (VISA, Mastercard, AMEX, etc.). This makes this tool ideal for situations where you need to limit access to users over 18. If a user passes this confirmation test, they will be returned to the original site. 18confirm.com is a free service that inculdes easy developer integration.
The following is a list of libraries from ProgrammableWeb's Library Directory that matched your search term. Although there many different interpretations of the word "library" among software developers, ProgrammableWeb adheres to a specific definition so as to clearly distinguish libraries from SDKs and frameworks in a way that will facilitate clean search results. In ProgrammableWeb's parlance, the term "library" is strictly used to describe a platform-specific software tool that, when installed, results in the provisioning a specific API. Conversely, SDKs are exclusively for consuming APIs and Frameworks are agnostic to specific APIs. If you think a library, SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.