Send form submission data to HubSpot. Form submissions from external sources can be made to any registered HubSpot form. You can see a list of forms on your portal by going to the Contacts > Forms page.
We suggest that you create a unique form within HubSpot to parallel your custom website form. This will make it easy to track submissions on that particular custom form in the future. More information can be found here.
The Form GUID can be found in one of two ways. First, you can pull a list of Contact Forms using the Forms API, as documented here
You can also find the Form GUID in the HubSpot UI: navigate to Contacts > Forms from the navigation menu > click to edit a specifc form > when editing a specific form, you can find the Form GUID in the URL. In the URL https://app.hubspot.com/forms/62515/78c2891f-ebdd-44c0-bd94-15c012bbbfbf/edit/, the form GUID is 78c2891f-ebdd-44c0-bd94-15c012bbbfbf
Please Note You should also note that the HS Context and HubSpot tracking cookie listed as optional parameters are very important to users - they provide additional context about the form submission and the user submitting the form. While optional, you should pass these parameters in whenever possible for the best customer experience.