Submit Form API has NO Authentication

ShekarC

I'm looking to integrate my Web Form to HubSpot using the API recommended in https://legacydocs.hubspot.com/docs/methods/forms/submit_form
It works well
But the biggest drawback of this API is that there is NO AUTHENTICATION
Anyone who knows or intercepts the API call from the Website will find out the Portal ID & Form Guid and can flood my hubspot instance with lot of Form Submissions.

Any reason this API is designed this way ?

How to secure it ?

 

https://community.hubspot.com/t5/APIs-Integrations/Submit-Form-API-has-NO-Authentication/m-p/498947#...

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