Available on: Professional, Business plans
On upgraded plans, each form is provided a set of API keys that can be used to access form submissions programatically. To get your form keys just go to your form's settings page and enable the "API" toggle.
Each form has a public read-only key and a master key for read and write operations. You can embed your read-only key in frontend applications, but only if you intend for the forms submissions to be public.