The OS Commerce project has a list of merchant account providers/gateways.
http://www.oscommerce.com

Oh, and OS Commerce is GPL if you decide to use their software.  :)

> -----Original Message-----
> From: Ben Bargabus [mailto:ben_b at ppdonline.com] 
> Sent: Friday, July 12, 2002 1:17 AM
> To: tclug-list at mn-linux.org
> Subject: [TCLUG] OT: E-commerce?
> 
> 
> Hello,
> I know this is off topic but some of you are involved in web 
> development and might be able to help me out.  I'm building a 
> site and need to support credit card transactions.  I'm 
> looking for a provider that will allow me to write my own CGI 
> scripts (in C) that will query against their server to verify 
> credit card transactions (my current merchant account doesn't 
> allow me to).  So somebody with a C lib I could use with my 
> code would be great but a well documented protocol without a 
> pre-built library would be fine too (I can write my own if 
> the protocol is well laid out).  Anyway, I'm looking for 
> recommendations, cost of service is always an issue but I'd 
> also like a company that's developer friendly. Thanks and 
> sorry for the OT post, Ben. 
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