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 programmatically. To get your form keys just go to your form's Settings tab and enable the "HTTP API" toggle:
Each form has a public Read-only API key and a Master API 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.