When using the Form module, you have to ability enable POST integration. With this setting enabled, when the users clicks the “Submit” button in the Form, the values entered by the user will be sent via a POST request to the endpoint specified under the Form Settings.
The setting needed for enabling POST integration, is shown below:
Receiving data from Form POST integration
The values received by the endpoint, will come in form of standard Web Form values. Each value will have a key corresponding the the “Name” value of the form element. Looking at the overview of your Form, you will a list of all Name of all form fields.
Please note that the “Name” value is an internal name not visible by the end-user, as not to confuse with the “Label” value
For the form in the figure below, the data received by the endpoint would be: