Looking for online commerce merchant integratable to form/page.

Which integratable online commerce merchant will permit me to easily customize my "store front" --or embed pay buttons on a jotform or squarespace landing page to describe and offer services?

Do you mean you want to provide a way for your customers to see your products/services and let them pay using JotForm? I am happy to inform you that we have a variety of payment gateways/integrations (e.g. Square, PayPal, Stripe) which you can use with your form. To see them, while building your form, open Form Elements and click on Payments.

 

If you need more information regarding integrating your form with payment gateways, please see Setting Up Your First Order Form.