Pinterest returns 403 PINNER_DATA_ACCESS_DENIED for apps registered from September 14, 2026

What changed

Pinterest's docs state that apps registered on or after September 14, 2026 may receive an HTTP 403 error with the code PINNER_DATA_ACCESS_DENIED when requesting a board or Pin without Pinterest's authorization for non-business users. The changelog lists this as Pinner data access denial error under pins and boards in September 2026. The detailed entry text was not readable, so the day it was announced is not stated.

What it means

New apps may get a 403 error when requesting a board or Pin without Pinterest's authorization for non-business users.

Who is affected

Developers registering a new Pinterest app after September 13, 2026, and tools that read other people's boards or Pins.

What to do by 14 Sept 2026

Expect the 403 error with the PINNER_DATA_ACCESS_DENIED code on apps registered on or after September 14, 2026 and do not retry in a loop. If your app needs other users' boards or Pins, you need Pinterest's authorization first; the docs do not say how to request it.