I'm looking to have users go to our site, enter invoice number, amount, and billing info + cc and have real time proccessing.

Does anyone know of or can recommend a merchant for this type of service? I know Verisign API can do this but are there any others?

Thanks

All gateways can provide this service to you. I take it you are in the US? How many transactions a month / monthly volume are you looking at?

Very few say 10-15, but the amounts may vary up to about 5000. I'm looking for somehting similar to this:

https://www.hawcpa.com/payments/

The amount could be a bit difficult to get approved - depending on your past credit history / merchant account history. High amounts like that sometimes raises a flag at a processor, because if there is a chargeback for that amount & you are unable to cover it, it is up to the processor at that point.

well then I would limit the amounts to under 1000 . . . but which merchant would let me customize the form or host my own becuase I need to a place for invoice number etc. ??

Well the three major gateways in the United States (Verisign, LinkPoint, and Authorizenet.com) all offer the API where you can accepts & process CCs on your own secure website.

It is actually the gateway that offers that. As far as the CC processors, most processors have the ability to use one of the above gateways.

Contact startups4less.com (http://startups4less.com). They are excellent at creating customized payment solutions for e-commerce. They work with all the major gateways and merchant account processors. We used them for a custom shopping cart and were very pleased with the quality and price.

It seems to me that they are in serious trouble.
On the homepage you`ll get this type of under construction msg: "Website title here".

:)