: Automatic Online Payments I'm building a site which will notify users via SMS when there is a new job that meets their criteria. Currently they then have to login to the site and pay (via

@Pope3001725

Authorize.Net's Customer Information Manager (CIM) API offers this functionality. Basically you create a customer payment profile on their server (i.e. they store the credit card details) and then you charge against it by passing them the profile ID whenever payment needs to be made.

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@Jessie594

Chargify.com's usage based billing

"Chargify supports several kinds of usage-based billing, including metered-usage (ie, sales leads and text messages) and per-seat (ie, software license fees per user). This allows you to mix and match flat-rate product fees with variable usage-based fees to match your business and market needs. Usage of metered components is tallied throughout the billing cycle and the charge is seamlessly integrated as a line item on Customers’ next invoice."
chargify.com/

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@Ravi8258870

Have you considered using reverse SMS billing or direct mobile billing. One of these two would provide you with a faster way of charging for your service without the hassle for the user. Reverse SMS is pretty easy and quick to implement, though it might lead to bill shock so be careful.

Parkers car valuations is a good example of this type of service. You input your registration information and they provide an immediate valuation for 1.50 charged via your mobile account.

You may also find wiki's article on mobile payments interesting as it outlines the most popular mobile solutions in the field.

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