Integration with e-commerce site


I have a e-commerce site for which i want to integrate erpnext for accounting part.

Integration entities will be like sales, purchase, payments & receipts, i have these screens in my e-commerce site and i want to post this transaction data to erpnext so that i can download financial statements from erpnext.

From where I can get the api’s to get integrated with the above entities.

First of all, Welcome!
Next, here’s a tip: If you share the name of the platform you will be able to get better answers.