The site provides API interface for external program usage.
There are two API drivers: SOAP and GrapqhQL.
SOAP API available with following schema.
To test SOAP API you can download C# client with source codes.
Or you can test SOAP API with this Python script.
GraphQL API available with following schema endpoint.
You can test GraphQL code, downloading this Python script.
Multiple queries example can be found in this Python script.
Conversion by API limited by time and quantity.
Current limits can be found at account page.