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We hope you've managed to come to a firm decision regarding the API
The pages within the Portal Systems menu above describe in detail the vast difference between the two products with respect to one of them being a basic database listing IFrame and the other product comprising of a complete online charter marketing solution.
If you are still not confident enough to use the online order form on this page, please don't hesitate to contact us and we will be able to help you further make the right decision.
The Charter Index IFrame portal system costs $695 USD per year (or is included in Charter Index's Online subscription)
The Charter Index API service costs $500 USD per month.