Hey all, I am trying to prepare for the changes that are to come in November regarding the move from the API key to private apps.
currently, I only use this route from the API: “submissions/v3/integration/submit” which does not require the API key only the portal id and the form id. I am unsure as to what changes need to be done if any since I am not using the API key currently.
If someone can please clarify this situation, it will be greatly appreciated
Thank you!
Hey, @TanyaTikhonov 
To clarify, you are using the non-Authenticated endpoint, correct? — Submit data to a form
POST https://api.hsforms.com/submissions/v3/integration/submit/:portalId/:formGuid
If so, this endpoint is not changing. Legacy endpoints are stable and supported and, unless explicitly noted, continue to be supported.
The documentation recommends switching to the authenticated version of the form submit endpoint, but it is not required:
HubSpot recommends using the authenticated v3 endpoint documented here. This endpoint has higher rate limits, and does not require listing the submitted form fields in the definition beforehand.
In summary, this non-authenticated endpoint is not affected by the HAPI key sunset.
Have fun building! — Jaycee