As already mentioned on the page "To begin with", integrating Soisy via API is a procedure divided into 4 sequential steps:
At the end of each of these steps, you can decide whether to redirect the client to our webapp to complete the rest of the steps on our funnel. You will be shown a different page depending on where you arrived with the integration.
In the JSON response, which you will receive at the last call of each of these steps, there will be a field called
redirectUrl containing the complete URL to which to redirect the user. You don't have to worry about building it or analyzing it: we generate it and you think only of the requestor's redirection 😄